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Edit File: underscore-node-f.cjs

//     Underscore.js 1.13.4
//     https://underscorejs.org
//     (c) 2009-2022 Jeremy Ashkenas, Julian Gonggrijp, and DocumentCloud and Investigative Reporters & Editors
//     Underscore may be freely distributed under the MIT license.

Object.defineProperty(exports, '__esModule', { value: true });

// Current version.
var VERSION = '1.13.4';

// Establish the root object, `window` (`self`) in the browser, `global`
// on the server, or `this` in some virtual machines. We use `self`
// instead of `window` for `WebWorker` support.
var root = (typeof self == 'object' && self.self === self && self) ||
          (typeof global == 'object' && global.global === global && global) ||
          Function('return this')() ||
          {};

// Save bytes in the minified (but not gzipped) version:
var ArrayProto = Array.prototype, ObjProto = Object.prototype;
var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null;

// Create quick reference variables for speed access to core prototypes.
var push = ArrayProto.push,
    slice = ArrayProto.slice,
    toString = ObjProto.toString,
    hasOwnProperty = ObjProto.hasOwnProperty;

// Modern feature detection.
var supportsArrayBuffer = typeof ArrayBuffer !== 'undefined',
    supportsDataView = typeof DataView !== 'undefined';

// All **ECMAScript 5+** native function implementations that we hope to use
// are declared here.
var nativeIsArray = Array.isArray,
    nativeKeys = Object.keys,
    nativeCreate = Object.create,
    nativeIsView = supportsArrayBuffer && ArrayBuffer.isView;

// Create references to these builtin functions because we override them.
var _isNaN = isNaN,
    _isFinite = isFinite;

// Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
  'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];

// The largest integer that can be represented exactly.
var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;

// Some functions take a variable number of arguments, or a few expected
// arguments at the beginning and then a variable number of values to operate
// on. This helper accumulates all remaining arguments past the function’s
// argument length (or an explicit `startIndex`), into an array that becomes
// the last argument. Similar to ES6’s "rest parameter".
function restArguments(func, startIndex) {
  startIndex = startIndex == null ? func.length - 1 : +startIndex;
  return function() {
    var length = Math.max(arguments.length - startIndex, 0),
        rest = Array(length),
        index = 0;
    for (; index < length; index++) {
      rest[index] = arguments[index + startIndex];
    }
    switch (startIndex) {
      case 0: return func.call(this, rest);
      case 1: return func.call(this, arguments[0], rest);
      case 2: return func.call(this, arguments[0], arguments[1], rest);
    }
    var args = Array(startIndex + 1);
    for (index = 0; index < startIndex; index++) {
      args[index] = arguments[index];
    }
    args[startIndex] = rest;
    return func.apply(this, args);
  };
}

// Is a given variable an object?
function isObject(obj) {
  var type = typeof obj;
  return type === 'function' || (type === 'object' && !!obj);
}

// Is a given value equal to null?
function isNull(obj) {
  return obj === null;
}

// Is a given variable undefined?
function isUndefined(obj) {
  return obj === void 0;
}

// Is a given value a boolean?
function isBoolean(obj) {
  return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
}

// Is a given value a DOM element?
function isElement(obj) {
  return !!(obj && obj.nodeType === 1);
}

// Internal function for creating a `toString`-based type tester.
function tagTester(name) {
  var tag = '[object ' + name + ']';
  return function(obj) {
    return toString.call(obj) === tag;
  };
}

var isString = tagTester('String');

var isNumber = tagTester('Number');

var isDate = tagTester('Date');

var isRegExp = tagTester('RegExp');

var isError = tagTester('Error');

var isSymbol = tagTester('Symbol');

var isArrayBuffer = tagTester('ArrayBuffer');

var isFunction = tagTester('Function');

// Optimize `isFunction` if appropriate. Work around some `typeof` bugs in old
// v8, IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
var nodelist = root.document && root.document.childNodes;
if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
  isFunction = function(obj) {
    return typeof obj == 'function' || false;
  };
}

var isFunction$1 = isFunction;

var hasObjectTag = tagTester('Object');

// In IE 10 - Edge 13, `DataView` has string tag `'[object Object]'`.
// In IE 11, the most common among them, this problem also applies to
// `Map`, `WeakMap` and `Set`.
var hasStringTagBug = (
      supportsDataView && hasObjectTag(new DataView(new ArrayBuffer(8)))
    ),
    isIE11 = (typeof Map !== 'undefined' && hasObjectTag(new Map));

var isDataView = tagTester('DataView');

// In IE 10 - Edge 13, we need a different heuristic
// to determine whether an object is a `DataView`.
function ie10IsDataView(obj) {
  return obj != null && isFunction$1(obj.getInt8) && isArrayBuffer(obj.buffer);
}

var isDataView$1 = (hasStringTagBug ? ie10IsDataView : isDataView);

// Is a given value an array?
// Delegates to ECMA5's native `Array.isArray`.
var isArray = nativeIsArray || tagTester('Array');

// Internal function to check whether `key` is an own property name of `obj`.
function has$1(obj, key) {
  return obj != null && hasOwnProperty.call(obj, key);
}

var isArguments = tagTester('Arguments');

// Define a fallback version of the method in browsers (ahem, IE < 9), where
// there isn't any inspectable "Arguments" type.
(function() {
  if (!isArguments(arguments)) {
    isArguments = function(obj) {
      return has$1(obj, 'callee');
    };
  }
}());

var isArguments$1 = isArguments;

// Is a given object a finite number?
function isFinite$1(obj) {
  return !isSymbol(obj) && _isFinite(obj) && !isNaN(parseFloat(obj));
}

// Is the given value `NaN`?
function isNaN$1(obj) {
  return isNumber(obj) && _isNaN(obj);
}

// Predicate-generating function. Often useful outside of Underscore.
function constant(value) {
  return function() {
    return value;
  };
}

// Common internal logic for `isArrayLike` and `isBufferLike`.
function createSizePropertyCheck(getSizeProperty) {
  return function(collection) {
    var sizeProperty = getSizeProperty(collection);
    return typeof sizeProperty == 'number' && sizeProperty >= 0 && sizeProperty <= MAX_ARRAY_INDEX;
  }
}

// Internal helper to generate a function to obtain property `key` from `obj`.
function shallowProperty(key) {
  return function(obj) {
    return obj == null ? void 0 : obj[key];
  };
}

// Internal helper to obtain the `byteLength` property of an object.
var getByteLength = shallowProperty('byteLength');

// Internal helper to determine whether we should spend extensive checks against
// `ArrayBuffer` et al.
var isBufferLike = createSizePropertyCheck(getByteLength);

// Is a given value a typed array?
var typedArrayPattern = /\[object ((I|Ui)nt(8|16|32)|Float(32|64)|Uint8Clamped|Big(I|Ui)nt64)Array\]/;
function isTypedArray(obj) {
  // `ArrayBuffer.isView` is the most future-proof, so use it when available.
  // Otherwise, fall back on the above regular expression.
  return nativeIsView ? (nativeIsView(obj) && !isDataView$1(obj)) :
                isBufferLike(obj) && typedArrayPattern.test(toString.call(obj));
}

var isTypedArray$1 = supportsArrayBuffer ? isTypedArray : constant(false);

// Internal helper to obtain the `length` property of an object.
var getLength = shallowProperty('length');

// Internal helper to create a simple lookup structure.
// `collectNonEnumProps` used to depend on `_.contains`, but this led to
// circular imports. `emulatedSet` is a one-off solution that only works for
// arrays of strings.
function emulatedSet(keys) {
  var hash = {};
  for (var l = keys.length, i = 0; i < l; ++i) hash[keys[i]] = true;
  return {
    contains: function(key) { return hash[key] === true; },
    push: function(key) {
      hash[key] = true;
      return keys.push(key);
    }
  };
}

// Internal helper. Checks `keys` for the presence of keys in IE < 9 that won't
// be iterated by `for key in ...` and thus missed. Extends `keys` in place if
// needed.
function collectNonEnumProps(obj, keys) {
  keys = emulatedSet(keys);
  var nonEnumIdx = nonEnumerableProps.length;
  var constructor = obj.constructor;
  var proto = (isFunction$1(constructor) && constructor.prototype) || ObjProto;

// Constructor is a special case.
  var prop = 'constructor';
  if (has$1(obj, prop) && !keys.contains(prop)) keys.push(prop);

while (nonEnumIdx--) {
    prop = nonEnumerableProps[nonEnumIdx];
    if (prop in obj && obj[prop] !== proto[prop] && !keys.contains(prop)) {
      keys.push(prop);
    }
  }
}

// Retrieve the names of an object's own properties.
// Delegates to **ECMAScript 5**'s native `Object.keys`.
function keys(obj) {
  if (!isObject(obj)) return [];
  if (nativeKeys) return nativeKeys(obj);
  var keys = [];
  for (var key in obj) if (has$1(obj, key)) keys.push(key);
  // Ahem, IE < 9.
  if (hasEnumBug) collectNonEnumProps(obj, keys);
  return keys;
}

// Is a given array, string, or object empty?
// An "empty" object has no enumerable own-properties.
function isEmpty(obj) {
  if (obj == null) return true;
  // Skip the more expensive `toString`-based type checks if `obj` has no
  // `.length`.
  var length = getLength(obj);
  if (typeof length == 'number' && (
    isArray(obj) || isString(obj) || isArguments$1(obj)
  )) return length === 0;
  return getLength(keys(obj)) === 0;
}

// Returns whether an object has a given set of `key:value` pairs.
function isMatch(object, attrs) {
  var _keys = keys(attrs), length = _keys.length;
  if (object == null) return !length;
  var obj = Object(object);
  for (var i = 0; i < length; i++) {
    var key = _keys[i];
    if (attrs[key] !== obj[key] || !(key in obj)) return false;
  }
  return true;
}

// If Underscore is called as a function, it returns a wrapped object that can
// be used OO-style. This wrapper holds altered versions of all functions added
// through `_.mixin`. Wrapped objects may be chained.
function _$1(obj) {
  if (obj instanceof _$1) return obj;
  if (!(this instanceof _$1)) return new _$1(obj);
  this._wrapped = obj;
}

_$1.VERSION = VERSION;

// Extracts the result from a wrapped and chained object.
_$1.prototype.value = function() {
  return this._wrapped;
};

// Provide unwrapping proxies for some methods used in engine operations
// such as arithmetic and JSON stringification.
_$1.prototype.valueOf = _$1.prototype.toJSON = _$1.prototype.value;

_$1.prototype.toString = function() {
  return String(this._wrapped);
};

// Internal function to wrap or shallow-copy an ArrayBuffer,
// typed array or DataView to a new view, reusing the buffer.
function toBufferView(bufferSource) {
  return new Uint8Array(
    bufferSource.buffer || bufferSource,
    bufferSource.byteOffset || 0,
    getByteLength(bufferSource)
  );
}

// We use this string twice, so give it a name for minification.
var tagDataView = '[object DataView]';

// Internal recursive comparison function for `_.isEqual`.
function eq(a, b, aStack, bStack) {
  // Identical objects are equal. `0 === -0`, but they aren't identical.
  // See the [Harmony `egal` proposal](https://wiki.ecmascript.org/doku.php?id=harmony:egal).
  if (a === b) return a !== 0 || 1 / a === 1 / b;
  // `null` or `undefined` only equal to itself (strict comparison).
  if (a == null || b == null) return false;
  // `NaN`s are equivalent, but non-reflexive.
  if (a !== a) return b !== b;
  // Exhaust primitive checks
  var type = typeof a;
  if (type !== 'function' && type !== 'object' && typeof b != 'object') return false;
  return deepEq(a, b, aStack, bStack);
}

// Internal recursive comparison function for `_.isEqual`.
function deepEq(a, b, aStack, bStack) {
  // Unwrap any wrapped objects.
  if (a instanceof _$1) a = a._wrapped;
  if (b instanceof _$1) b = b._wrapped;
  // Compare `[[Class]]` names.
  var className = toString.call(a);
  if (className !== toString.call(b)) return false;
  // Work around a bug in IE 10 - Edge 13.
  if (hasStringTagBug && className == '[object Object]' && isDataView$1(a)) {
    if (!isDataView$1(b)) return false;
    className = tagDataView;
  }
  switch (className) {
    // These types are compared by value.
    case '[object RegExp]':
      // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
    case '[object String]':
      // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
      // equivalent to `new String("5")`.
      return '' + a === '' + b;
    case '[object Number]':
      // `NaN`s are equivalent, but non-reflexive.
      // Object(NaN) is equivalent to NaN.
      if (+a !== +a) return +b !== +b;
      // An `egal` comparison is performed for other numeric values.
      return +a === 0 ? 1 / +a === 1 / b : +a === +b;
    case '[object Date]':
    case '[object Boolean]':
      // Coerce dates and booleans to numeric primitive values. Dates are compared by their
      // millisecond representations. Note that invalid dates with millisecond representations
      // of `NaN` are not equivalent.
      return +a === +b;
    case '[object Symbol]':
      return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b);
    case '[object ArrayBuffer]':
    case tagDataView:
      // Coerce to typed array so we can fall through.
      return deepEq(toBufferView(a), toBufferView(b), aStack, bStack);
  }

var areArrays = className === '[object Array]';
  if (!areArrays && isTypedArray$1(a)) {
      var byteLength = getByteLength(a);
      if (byteLength !== getByteLength(b)) return false;
      if (a.buffer === b.buffer && a.byteOffset === b.byteOffset) return true;
      areArrays = true;
  }
  if (!areArrays) {
    if (typeof a != 'object' || typeof b != 'object') return false;

// Objects with different constructors are not equivalent, but `Object`s or `Array`s
    // from different frames are.
    var aCtor = a.constructor, bCtor = b.constructor;
    if (aCtor !== bCtor && !(isFunction$1(aCtor) && aCtor instanceof aCtor &&
                             isFunction$1(bCtor) && bCtor instanceof bCtor)
                        && ('constructor' in a && 'constructor' in b)) {
      return false;
    }
  }
  // Assume equality for cyclic structures. The algorithm for detecting cyclic
  // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.

// Initializing stack of traversed objects.
  // It's done here since we only need them for objects and arrays comparison.
  aStack = aStack || [];
  bStack = bStack || [];
  var length = aStack.length;
  while (length--) {
    // Linear search. Performance is inversely proportional to the number of
    // unique nested structures.
    if (aStack[length] === a) return bStack[length] === b;
  }

// Add the first object to the stack of traversed objects.
  aStack.push(a);
  bStack.push(b);

// Recursively compare objects and arrays.
  if (areArrays) {
    // Compare array lengths to determine if a deep comparison is necessary.
    length = a.length;
    if (length !== b.length) return false;
    // Deep compare the contents, ignoring non-numeric properties.
    while (length--) {
      if (!eq(a[length], b[length], aStack, bStack)) return false;
    }
  } else {
    // Deep compare objects.
    var _keys = keys(a), key;
    length = _keys.length;
    // Ensure that both objects contain the same number of properties before comparing deep equality.
    if (keys(b).length !== length) return false;
    while (length--) {
      // Deep compare each member
      key = _keys[length];
      if (!(has$1(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
    }
  }
  // Remove the first object from the stack of traversed objects.
  aStack.pop();
  bStack.pop();
  return true;
}

// Perform a deep comparison to check if two objects are equal.
function isEqual(a, b) {
  return eq(a, b);
}

// Retrieve all the enumerable property names of an object.
function allKeys(obj) {
  if (!isObject(obj)) return [];
  var keys = [];
  for (var key in obj) keys.push(key);
  // Ahem, IE < 9.
  if (hasEnumBug) collectNonEnumProps(obj, keys);
  return keys;
}

// Since the regular `Object.prototype.toString` type tests don't work for
// some types in IE 11, we use a fingerprinting heuristic instead, based
// on the methods. It's not great, but it's the best we got.
// The fingerprint method lists are defined below.
function ie11fingerprint(methods) {
  var length = getLength(methods);
  return function(obj) {
    if (obj == null) return false;
    // `Map`, `WeakMap` and `Set` have no enumerable keys.
    var keys = allKeys(obj);
    if (getLength(keys)) return false;
    for (var i = 0; i < length; i++) {
      if (!isFunction$1(obj[methods[i]])) return false;
    }
    // If we are testing against `WeakMap`, we need to ensure that
    // `obj` doesn't have a `forEach` method in order to distinguish
    // it from a regular `Map`.
    return methods !== weakMapMethods || !isFunction$1(obj[forEachName]);
  };
}

// In the interest of compact minification, we write
// each string in the fingerprints only once.
var forEachName = 'forEach',
    hasName = 'has',
    commonInit = ['clear', 'delete'],
    mapTail = ['get', hasName, 'set'];

// `Map`, `WeakMap` and `Set` each have slightly different
// combinations of the above sublists.
var mapMethods = commonInit.concat(forEachName, mapTail),
    weakMapMethods = commonInit.concat(mapTail),
    setMethods = ['add'].concat(commonInit, forEachName, hasName);

var isMap = isIE11 ? ie11fingerprint(mapMethods) : tagTester('Map');

var isWeakMap = isIE11 ? ie11fingerprint(weakMapMethods) : tagTester('WeakMap');

var isSet = isIE11 ? ie11fingerprint(setMethods) : tagTester('Set');

var isWeakSet = tagTester('WeakSet');

// Retrieve the values of an object's properties.
function values(obj) {
  var _keys = keys(obj);
  var length = _keys.length;
  var values = Array(length);
  for (var i = 0; i < length; i++) {
    values[i] = obj[_keys[i]];
  }
  return values;
}

// Convert an object into a list of `[key, value]` pairs.
// The opposite of `_.object` with one argument.
function pairs(obj) {
  var _keys = keys(obj);
  var length = _keys.length;
  var pairs = Array(length);
  for (var i = 0; i < length; i++) {
    pairs[i] = [_keys[i], obj[_keys[i]]];
  }
  return pairs;
}

// Invert the keys and values of an object. The values must be serializable.
function invert(obj) {
  var result = {};
  var _keys = keys(obj);
  for (var i = 0, length = _keys.length; i < length; i++) {
    result[obj[_keys[i]]] = _keys[i];
  }
  return result;
}

// Return a sorted list of the function names available on the object.
function functions(obj) {
  var names = [];
  for (var key in obj) {
    if (isFunction$1(obj[key])) names.push(key);
  }
  return names.sort();
}

// An internal function for creating assigner functions.
function createAssigner(keysFunc, defaults) {
  return function(obj) {
    var length = arguments.length;
    if (defaults) obj = Object(obj);
    if (length < 2 || obj == null) return obj;
    for (var index = 1; index < length; index++) {
      var source = arguments[index],
          keys = keysFunc(source),
          l = keys.length;
      for (var i = 0; i < l; i++) {
        var key = keys[i];
        if (!defaults || obj[key] === void 0) obj[key] = source[key];
      }
    }
    return obj;
  };
}

// Extend a given object with all the properties in passed-in object(s).
var extend = createAssigner(allKeys);

// Assigns a given object with all the own properties in the passed-in
// object(s).
// (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
var extendOwn = createAssigner(keys);

// Fill in a given object with default properties.
var defaults = createAssigner(allKeys, true);

// Create a naked function reference for surrogate-prototype-swapping.
function ctor() {
  return function(){};
}

// An internal function for creating a new object that inherits from another.
function baseCreate(prototype) {
  if (!isObject(prototype)) return {};
  if (nativeCreate) return nativeCreate(prototype);
  var Ctor = ctor();
  Ctor.prototype = prototype;
  var result = new Ctor;
  Ctor.prototype = null;
  return result;
}

// Creates an object that inherits from the given prototype object.
// If additional properties are provided then they will be added to the
// created object.
function create(prototype, props) {
  var result = baseCreate(prototype);
  if (props) extendOwn(result, props);
  return result;
}

// Create a (shallow-cloned) duplicate of an object.
function clone(obj) {
  if (!isObject(obj)) return obj;
  return isArray(obj) ? obj.slice() : extend({}, obj);
}

// Invokes `interceptor` with the `obj` and then returns `obj`.
// The primary purpose of this method is to "tap into" a method chain, in
// order to perform operations on intermediate results within the chain.
function tap(obj, interceptor) {
  interceptor(obj);
  return obj;
}

// Normalize a (deep) property `path` to array.
// Like `_.iteratee`, this function can be customized.
function toPath$1(path) {
  return isArray(path) ? path : [path];
}
_$1.toPath = toPath$1;

// Internal wrapper for `_.toPath` to enable minification.
// Similar to `cb` for `_.iteratee`.
function toPath(path) {
  return _$1.toPath(path);
}

// Internal function to obtain a nested property in `obj` along `path`.
function deepGet(obj, path) {
  var length = path.length;
  for (var i = 0; i < length; i++) {
    if (obj == null) return void 0;
    obj = obj[path[i]];
  }
  return length ? obj : void 0;
}

// Get the value of the (deep) property on `path` from `object`.
// If any property in `path` does not exist or if the value is
// `undefined`, return `defaultValue` instead.
// The `path` is normalized through `_.toPath`.
function get(object, path, defaultValue) {
  var value = deepGet(object, toPath(path));
  return isUndefined(value) ? defaultValue : value;
}

// Shortcut function for checking if an object has a given property directly on
// itself (in other words, not on a prototype). Unlike the internal `has`
// function, this public version can also traverse nested properties.
function has(obj, path) {
  path = toPath(path);
  var length = path.length;
  for (var i = 0; i < length; i++) {
    var key = path[i];
    if (!has$1(obj, key)) return false;
    obj = obj[key];
  }
  return !!length;
}

// Keep the identity function around for default iteratees.
function identity(value) {
  return value;
}

// Returns a predicate for checking whether an object has a given set of
// `key:value` pairs.
function matcher(attrs) {
  attrs = extendOwn({}, attrs);
  return function(obj) {
    return isMatch(obj, attrs);
  };
}

// Creates a function that, when passed an object, will traverse that object’s
// properties down the given `path`, specified as an array of keys or indices.
function property(path) {
  path = toPath(path);
  return function(obj) {
    return deepGet(obj, path);
  };
}

// Internal function that returns an efficient (for current engines) version
// of the passed-in callback, to be repeatedly applied in other Underscore
// functions.
function optimizeCb(func, context, argCount) {
  if (context === void 0) return func;
  switch (argCount == null ? 3 : argCount) {
    case 1: return function(value) {
      return func.call(context, value);
    };
    // The 2-argument case is omitted because we’re not using it.
    case 3: return function(value, index, collection) {
      return func.call(context, value, index, collection);
    };
    case 4: return function(accumulator, value, index, collection) {
      return func.call(context, accumulator, value, index, collection);
    };
  }
  return function() {
    return func.apply(context, arguments);
  };
}

// An internal function to generate callbacks that can be applied to each
// element in a collection, returning the desired result — either `_.identity`,
// an arbitrary callback, a property matcher, or a property accessor.
function baseIteratee(value, context, argCount) {
  if (value == null) return identity;
  if (isFunction$1(value)) return optimizeCb(value, context, argCount);
  if (isObject(value) && !isArray(value)) return matcher(value);
  return property(value);
}

// External wrapper for our callback generator. Users may customize
// `_.iteratee` if they want additional predicate/iteratee shorthand styles.
// This abstraction hides the internal-only `argCount` argument.
function iteratee(value, context) {
  return baseIteratee(value, context, Infinity);
}
_$1.iteratee = iteratee;

// The function we call internally to generate a callback. It invokes
// `_.iteratee` if overridden, otherwise `baseIteratee`.
function cb(value, context, argCount) {
  if (_$1.iteratee !== iteratee) return _$1.iteratee(value, context);
  return baseIteratee(value, context, argCount);
}

// Returns the results of applying the `iteratee` to each element of `obj`.
// In contrast to `_.map` it returns an object.
function mapObject(obj, iteratee, context) {
  iteratee = cb(iteratee, context);
  var _keys = keys(obj),
      length = _keys.length,
      results = {};
  for (var index = 0; index < length; index++) {
    var currentKey = _keys[index];
    results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
  }
  return results;
}

// Predicate-generating function. Often useful outside of Underscore.
function noop(){}

// Generates a function for a given object that returns a given property.
function propertyOf(obj) {
  if (obj == null) return noop;
  return function(path) {
    return get(obj, path);
  };
}

// Run a function **n** times.
function times(n, iteratee, context) {
  var accum = Array(Math.max(0, n));
  iteratee = optimizeCb(iteratee, context, 1);
  for (var i = 0; i < n; i++) accum[i] = iteratee(i);
  return accum;
}

// Return a random integer between `min` and `max` (inclusive).
function random(min, max) {
  if (max == null) {
    max = min;
    min = 0;
  }
  return min + Math.floor(Math.random() * (max - min + 1));
}

// A (possibly faster) way to get the current timestamp as an integer.
var now = Date.now || function() {
  return new Date().getTime();
};

// Internal helper to generate functions for escaping and unescaping strings
// to/from HTML interpolation.
function createEscaper(map) {
  var escaper = function(match) {
    return map[match];
  };
  // Regexes for identifying a key that needs to be escaped.
  var source = '(?:' + keys(map).join('|') + ')';
  var testRegexp = RegExp(source);
  var replaceRegexp = RegExp(source, 'g');
  return function(string) {
    string = string == null ? '' : '' + string;
    return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
  };
}

// Internal list of HTML entities for escaping.
var escapeMap = {
  '&': '&amp;',
  '<': '&lt;',
  '>': '&gt;',
  '"': '&quot;',
  "'": '&#x27;',
  '`': '&#x60;'
};

// Function for escaping strings to HTML interpolation.
var _escape = createEscaper(escapeMap);

// Internal list of HTML entities for unescaping.
var unescapeMap = invert(escapeMap);

// Function for unescaping strings from HTML interpolation.
var _unescape = createEscaper(unescapeMap);

// By default, Underscore uses ERB-style template delimiters. Change the
// following template settings to use alternative delimiters.
var templateSettings = _$1.templateSettings = {
  evaluate: /<%([\s\S]+?)%>/g,
  interpolate: /<%=([\s\S]+?)%>/g,
  escape: /<%-([\s\S]+?)%>/g
};

// When customizing `_.templateSettings`, if you don't want to define an
// interpolation, evaluation or escaping regex, we need one that is
// guaranteed not to match.
var noMatch = /(.)^/;

// Certain characters need to be escaped so that they can be put into a
// string literal.
var escapes = {
  "'": "'",
  '\\': '\\',
  '\r': 'r',
  '\n': 'n',
  '\u2028': 'u2028',
  '\u2029': 'u2029'
};

var escapeRegExp = /\\|'|\r|\n|\u2028|\u2029/g;

function escapeChar(match) {
  return '\\' + escapes[match];
}

// In order to prevent third-party code injection through
// `_.templateSettings.variable`, we test it against the following regular
// expression. It is intentionally a bit more liberal than just matching valid
// identifiers, but still prevents possible loopholes through defaults or
// destructuring assignment.
var bareIdentifier = /^\s*(\w|\$)+\s*$/;

// JavaScript micro-templating, similar to John Resig's implementation.
// Underscore templating handles arbitrary delimiters, preserves whitespace,
// and correctly escapes quotes within interpolated code.
// NB: `oldSettings` only exists for backwards compatibility.
function template(text, settings, oldSettings) {
  if (!settings && oldSettings) settings = oldSettings;
  settings = defaults({}, settings, _$1.templateSettings);

// Combine delimiters into one regular expression via alternation.
  var matcher = RegExp([
    (settings.escape || noMatch).source,
    (settings.interpolate || noMatch).source,
    (settings.evaluate || noMatch).source
  ].join('|') + '|$', 'g');

// Compile the template source, escaping string literals appropriately.
  var index = 0;
  var source = "__p+='";
  text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
    source += text.slice(index, offset).replace(escapeRegExp, escapeChar);
    index = offset + match.length;

if (escape) {
      source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
    } else if (interpolate) {
      source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
    } else if (evaluate) {
      source += "';\n" + evaluate + "\n__p+='";
    }

// Adobe VMs need the match returned to produce the correct offset.
    return match;
  });
  source += "';\n";

source = "var __t,__p='',__j=Array.prototype.join," +
    "print=function(){__p+=__j.call(arguments,'');};\n" +
    source + 'return __p;\n';

var render;
  try {
    render = new Function(argument, '_', source);
  } catch (e) {
    e.source = source;
    throw e;
  }

var template = function(data) {
    return render.call(this, data, _$1);
  };

// Provide the compiled source as a convenience for precompilation.
  template.source = 'function(' + argument + '){\n' + source + '}';

return template;
}

// Traverses the children of `obj` along `path`. If a child is a function, it
// is invoked with its parent as context. Returns the value of the final
// child, or `fallback` if any child is undefined.
function result(obj, path, fallback) {
  path = toPath(path);
  var length = path.length;
  if (!length) {
    return isFunction$1(fallback) ? fallback.call(obj) : fallback;
  }
  for (var i = 0; i < length; i++) {
    var prop = obj == null ? void 0 : obj[path[i]];
    if (prop === void 0) {
      prop = fallback;
      i = length; // Ensure we don't continue iterating.
    }
    obj = isFunction$1(prop) ? prop.call(obj) : prop;
  }
  return obj;
}

// Generate a unique integer id (unique within the entire client session).
// Useful for temporary DOM ids.
var idCounter = 0;
function uniqueId(prefix) {
  var id = ++idCounter + '';
  return prefix ? prefix + id : id;
}

// Start chaining a wrapped Underscore object.
function chain(obj) {
  var instance = _$1(obj);
  instance._chain = true;
  return instance;
}

// Internal function to execute `sourceFunc` bound to `context` with optional
// `args`. Determines whether to execute a function as a constructor or as a
// normal function.
function executeBound(sourceFunc, boundFunc, context, callingContext, args) {
  if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
  var self = baseCreate(sourceFunc.prototype);
  var result = sourceFunc.apply(self, args);
  if (isObject(result)) return result;
  return self;
}

// Partially apply a function by creating a version that has had some of its
// arguments pre-filled, without changing its dynamic `this` context. `_` acts
// as a placeholder by default, allowing any combination of arguments to be
// pre-filled. Set `_.partial.placeholder` for a custom placeholder argument.
var partial = restArguments(function(func, boundArgs) {
  var placeholder = partial.placeholder;
  var bound = function() {
    var position = 0, length = boundArgs.length;
    var args = Array(length);
    for (var i = 0; i < length; i++) {
      args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i];
    }
    while (position < arguments.length) args.push(arguments[position++]);
    return executeBound(func, bound, this, this, args);
  };
  return bound;
});

partial.placeholder = _$1;

// Create a function bound to a given object (assigning `this`, and arguments,
// optionally).
var bind = restArguments(function(func, context, args) {
  if (!isFunction$1(func)) throw new TypeError('Bind must be called on a function');
  var bound = restArguments(function(callArgs) {
    return executeBound(func, bound, context, this, args.concat(callArgs));
  });
  return bound;
});

// Internal helper for collection methods to determine whether a collection
// should be iterated as an array or as an object.
// Related: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
// Avoids a very nasty iOS 8 JIT bug on ARM-64. #2094
var isArrayLike = createSizePropertyCheck(getLength);

// Internal implementation of a recursive `flatten` function.
function flatten$1(input, depth, strict, output) {
  output = output || [];
  if (!depth && depth !== 0) {
    depth = Infinity;
  } else if (depth <= 0) {
    return output.concat(input);
  }
  var idx = output.length;
  for (var i = 0, length = getLength(input); i < length; i++) {
    var value = input[i];
    if (isArrayLike(value) && (isArray(value) || isArguments$1(value))) {
      // Flatten current level of array or arguments object.
      if (depth > 1) {
        flatten$1(value, depth - 1, strict, output);
        idx = output.length;
      } else {
        var j = 0, len = value.length;
        while (j < len) output[idx++] = value[j++];
      }
    } else if (!strict) {
      output[idx++] = value;
    }
  }
  return output;
}

// Bind a number of an object's methods to that object. Remaining arguments
// are the method names to be bound. Useful for ensuring that all callbacks
// defined on an object belong to it.
var bindAll = restArguments(function(obj, keys) {
  keys = flatten$1(keys, false, false);
  var index = keys.length;
  if (index < 1) throw new Error('bindAll must be passed function names');
  while (index--) {
    var key = keys[index];
    obj[key] = bind(obj[key], obj);
  }
  return obj;
});

// Memoize an expensive function by storing its results.
function memoize(func, hasher) {
  var memoize = function(key) {
    var cache = memoize.cache;
    var address = '' + (hasher ? hasher.apply(this, arguments) : key);
    if (!has$1(cache, address)) cache[address] = func.apply(this, arguments);
    return cache[address];
  };
  memoize.cache = {};
  return memoize;
}

// Delays a function for the given number of milliseconds, and then calls
// it with the arguments supplied.
var delay = restArguments(function(func, wait, args) {
  return setTimeout(function() {
    return func.apply(null, args);
  }, wait);
});

// Defers a function, scheduling it to run after the current call stack has
// cleared.
var defer = partial(delay, _$1, 1);

// Returns a function, that, when invoked, will only be triggered at most once
// during a given window of time. Normally, the throttled function will run
// as much as it can, without ever going more than once per `wait` duration;
// but if you'd like to disable the execution on the leading edge, pass
// `{leading: false}`. To disable execution on the trailing edge, ditto.
function throttle(func, wait, options) {
  var timeout, context, args, result;
  var previous = 0;
  if (!options) options = {};

var later = function() {
    previous = options.leading === false ? 0 : now();
    timeout = null;
    result = func.apply(context, args);
    if (!timeout) context = args = null;
  };

throttled.cancel = function() {
    clearTimeout(timeout);
    previous = 0;
    timeout = context = args = null;
  };

return throttled;
}

// When a sequence of calls of the returned function ends, the argument
// function is triggered. The end of a sequence is defined by the `wait`
// parameter. If `immediate` is passed, the argument function will be
// triggered at the beginning of the sequence instead of at the end.
function debounce(func, wait, immediate) {
  var timeout, previous, args, result, context;

var debounced = restArguments(function(_args) {
    context = this;
    args = _args;
    previous = now();
    if (!timeout) {
      timeout = setTimeout(later, wait);
      if (immediate) result = func.apply(context, args);
    }
    return result;
  });

debounced.cancel = function() {
    clearTimeout(timeout);
    timeout = args = context = null;
  };

return debounced;
}

// Returns the first function passed as an argument to the second,
// allowing you to adjust arguments, run code before and after, and
// conditionally execute the original function.
function wrap(func, wrapper) {
  return partial(wrapper, func);
}

// Returns a negated version of the passed-in predicate.
function negate(predicate) {
  return function() {
    return !predicate.apply(this, arguments);
  };
}

// Returns a function that is the composition of a list of functions, each
// consuming the return value of the function that follows.
function compose() {
  var args = arguments;
  var start = args.length - 1;
  return function() {
    var i = start;
    var result = args[start].apply(this, arguments);
    while (i--) result = args[i].call(this, result);
    return result;
  };
}

// Returns a function that will only be executed on and after the Nth call.
function after(times, func) {
  return function() {
    if (--times < 1) {
      return func.apply(this, arguments);
    }
  };
}

// Returns a function that will only be executed up to (but not including) the
// Nth call.
function before(times, func) {
  var memo;
  return function() {
    if (--times > 0) {
      memo = func.apply(this, arguments);
    }
    if (times <= 1) func = null;
    return memo;
  };
}

// Returns a function that will be executed at most one time, no matter how
// often you call it. Useful for lazy initialization.
var once = partial(before, 2);

// Returns the first key on an object that passes a truth test.
function findKey(obj, predicate, context) {
  predicate = cb(predicate, context);
  var _keys = keys(obj), key;
  for (var i = 0, length = _keys.length; i < length; i++) {
    key = _keys[i];
    if (predicate(obj[key], key, obj)) return key;
  }
}

// Internal function to generate `_.findIndex` and `_.findLastIndex`.
function createPredicateIndexFinder(dir) {
  return function(array, predicate, context) {
    predicate = cb(predicate, context);
    var length = getLength(array);
    var index = dir > 0 ? 0 : length - 1;
    for (; index >= 0 && index < length; index += dir) {
      if (predicate(array[index], index, array)) return index;
    }
    return -1;
  };
}

// Returns the first index on an array-like that passes a truth test.
var findIndex = createPredicateIndexFinder(1);

// Returns the last index on an array-like that passes a truth test.
var findLastIndex = createPredicateIndexFinder(-1);

// Use a comparator function to figure out the smallest index at which
// an object should be inserted so as to maintain order. Uses binary search.
function sortedIndex(array, obj, iteratee, context) {
  iteratee = cb(iteratee, context, 1);
  var value = iteratee(obj);
  var low = 0, high = getLength(array);
  while (low < high) {
    var mid = Math.floor((low + high) / 2);
    if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
  }
  return low;
}

// Internal function to generate the `_.indexOf` and `_.lastIndexOf` functions.
function createIndexFinder(dir, predicateFind, sortedIndex) {
  return function(array, item, idx) {
    var i = 0, length = getLength(array);
    if (typeof idx == 'number') {
      if (dir > 0) {
        i = idx >= 0 ? idx : Math.max(idx + length, i);
      } else {
        length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
      }
    } else if (sortedIndex && idx && length) {
      idx = sortedIndex(array, item);
      return array[idx] === item ? idx : -1;
    }
    if (item !== item) {
      idx = predicateFind(slice.call(array, i, length), isNaN$1);
      return idx >= 0 ? idx + i : -1;
    }
    for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
      if (array[idx] === item) return idx;
    }
    return -1;
  };
}

// Return the position of the first occurrence of an item in an array,
// or -1 if the item is not included in the array.
// If the array is large and already in sort order, pass `true`
// for **isSorted** to use binary search.
var indexOf = createIndexFinder(1, findIndex, sortedIndex);

// Return the position of the last occurrence of an item in an array,
// or -1 if the item is not included in the array.
var lastIndexOf = createIndexFinder(-1, findLastIndex);

// Return the first value which passes a truth test.
function find(obj, predicate, context) {
  var keyFinder = isArrayLike(obj) ? findIndex : findKey;
  var key = keyFinder(obj, predicate, context);
  if (key !== void 0 && key !== -1) return obj[key];
}

// Convenience version of a common use case of `_.find`: getting the first
// object containing specific `key:value` pairs.
function findWhere(obj, attrs) {
  return find(obj, matcher(attrs));
}

// The cornerstone for collection functions, an `each`
// implementation, aka `forEach`.
// Handles raw objects in addition to array-likes. Treats all
// sparse array-likes as if they were dense.
function each(obj, iteratee, context) {
  iteratee = optimizeCb(iteratee, context);
  var i, length;
  if (isArrayLike(obj)) {
    for (i = 0, length = obj.length; i < length; i++) {
      iteratee(obj[i], i, obj);
    }
  } else {
    var _keys = keys(obj);
    for (i = 0, length = _keys.length; i < length; i++) {
      iteratee(obj[_keys[i]], _keys[i], obj);
    }
  }
  return obj;
}

// Return the results of applying the iteratee to each element.
function map(obj, iteratee, context) {
  iteratee = cb(iteratee, context);
  var _keys = !isArrayLike(obj) && keys(obj),
      length = (_keys || obj).length,
      results = Array(length);
  for (var index = 0; index < length; index++) {
    var currentKey = _keys ? _keys[index] : index;
    results[index] = iteratee(obj[currentKey], currentKey, obj);
  }
  return results;
}

// Internal helper to create a reducing function, iterating left or right.
function createReduce(dir) {
  // Wrap code that reassigns argument variables in a separate function than
  // the one that accesses `arguments.length` to avoid a perf hit. (#1991)
  var reducer = function(obj, iteratee, memo, initial) {
    var _keys = !isArrayLike(obj) && keys(obj),
        length = (_keys || obj).length,
        index = dir > 0 ? 0 : length - 1;
    if (!initial) {
      memo = obj[_keys ? _keys[index] : index];
      index += dir;
    }
    for (; index >= 0 && index < length; index += dir) {
      var currentKey = _keys ? _keys[index] : index;
      memo = iteratee(memo, obj[currentKey], currentKey, obj);
    }
    return memo;
  };

return function(obj, iteratee, memo, context) {
    var initial = arguments.length >= 3;
    return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
  };
}

// **Reduce** builds up a single result from a list of values, aka `inject`,
// or `foldl`.
var reduce = createReduce(1);

// The right-associative version of reduce, also known as `foldr`.
var reduceRight = createReduce(-1);

// Return all the elements that pass a truth test.
function filter(obj, predicate, context) {
  var results = [];
  predicate = cb(predicate, context);
  each(obj, function(value, index, list) {
    if (predicate(value, index, list)) results.push(value);
  });
  return results;
}

// Return all the elements for which a truth test fails.
function reject(obj, predicate, context) {
  return filter(obj, negate(cb(predicate)), context);
}

// Determine whether all of the elements pass a truth test.
function every(obj, predicate, context) {
  predicate = cb(predicate, context);
  var _keys = !isArrayLike(obj) && keys(obj),
      length = (_keys || obj).length;
  for (var index = 0; index < length; index++) {
    var currentKey = _keys ? _keys[index] : index;
    if (!predicate(obj[currentKey], currentKey, obj)) return false;
  }
  return true;
}

// Determine if at least one element in the object passes a truth test.
function some(obj, predicate, context) {
  predicate = cb(predicate, context);
  var _keys = !isArrayLike(obj) && keys(obj),
      length = (_keys || obj).length;
  for (var index = 0; index < length; index++) {
    var currentKey = _keys ? _keys[index] : index;
    if (predicate(obj[currentKey], currentKey, obj)) return true;
  }
  return false;
}

// Determine if the array or object contains a given item (using `===`).
function contains(obj, item, fromIndex, guard) {
  if (!isArrayLike(obj)) obj = values(obj);
  if (typeof fromIndex != 'number' || guard) fromIndex = 0;
  return indexOf(obj, item, fromIndex) >= 0;
}

// Invoke a method (with arguments) on every item in a collection.
var invoke = restArguments(function(obj, path, args) {
  var contextPath, func;
  if (isFunction$1(path)) {
    func = path;
  } else {
    path = toPath(path);
    contextPath = path.slice(0, -1);
    path = path[path.length - 1];
  }
  return map(obj, function(context) {
    var method = func;
    if (!method) {
      if (contextPath && contextPath.length) {
        context = deepGet(context, contextPath);
      }
      if (context == null) return void 0;
      method = context[path];
    }
    return method == null ? method : method.apply(context, args);
  });
});

// Convenience version of a common use case of `_.map`: fetching a property.
function pluck(obj, key) {
  return map(obj, property(key));
}

// Convenience version of a common use case of `_.filter`: selecting only
// objects containing specific `key:value` pairs.
function where(obj, attrs) {
  return filter(obj, matcher(attrs));
}

// Return the maximum element (or element-based computation).
function max(obj, iteratee, context) {
  var result = -Infinity, lastComputed = -Infinity,
      value, computed;
  if (iteratee == null || (typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null)) {
    obj = isArrayLike(obj) ? obj : values(obj);
    for (var i = 0, length = obj.length; i < length; i++) {
      value = obj[i];
      if (value != null && value > result) {
        result = value;
      }
    }
  } else {
    iteratee = cb(iteratee, context);
    each(obj, function(v, index, list) {
      computed = iteratee(v, index, list);
      if (computed > lastComputed || (computed === -Infinity && result === -Infinity)) {
        result = v;
        lastComputed = computed;
      }
    });
  }
  return result;
}

// Return the minimum element (or element-based computation).
function min(obj, iteratee, context) {
  var result = Infinity, lastComputed = Infinity,
      value, computed;
  if (iteratee == null || (typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null)) {
    obj = isArrayLike(obj) ? obj : values(obj);
    for (var i = 0, length = obj.length; i < length; i++) {
      value = obj[i];
      if (value != null && value < result) {
        result = value;
      }
    }
  } else {
    iteratee = cb(iteratee, context);
    each(obj, function(v, index, list) {
      computed = iteratee(v, index, list);
      if (computed < lastComputed || (computed === Infinity && result === Infinity)) {
        result = v;
        lastComputed = computed;
      }
    });
  }
  return result;
}

// Safely create a real, live array from anything iterable.
var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;
function toArray(obj) {
  if (!obj) return [];
  if (isArray(obj)) return slice.call(obj);
  if (isString(obj)) {
    // Keep surrogate pair characters together.
    return obj.match(reStrSymbol);
  }
  if (isArrayLike(obj)) return map(obj, identity);
  return values(obj);
}

// Sample **n** random values from a collection using the modern version of the
// [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
// If **n** is not specified, returns a single random element.
// The internal `guard` argument allows it to work with `_.map`.
function sample(obj, n, guard) {
  if (n == null || guard) {
    if (!isArrayLike(obj)) obj = values(obj);
    return obj[random(obj.length - 1)];
  }
  var sample = toArray(obj);
  var length = getLength(sample);
  n = Math.max(Math.min(n, length), 0);
  var last = length - 1;
  for (var index = 0; index < n; index++) {
    var rand = random(index, last);
    var temp = sample[index];
    sample[index] = sample[rand];
    sample[rand] = temp;
  }
  return sample.slice(0, n);
}

// Shuffle a collection.
function shuffle(obj) {
  return sample(obj, Infinity);
}

// Sort the object's values by a criterion produced by an iteratee.
function sortBy(obj, iteratee, context) {
  var index = 0;
  iteratee = cb(iteratee, context);
  return pluck(map(obj, function(value, key, list) {
    return {
      value: value,
      index: index++,
      criteria: iteratee(value, key, list)
    };
  }).sort(function(left, right) {
    var a = left.criteria;
    var b = right.criteria;
    if (a !== b) {
      if (a > b || a === void 0) return 1;
      if (a < b || b === void 0) return -1;
    }
    return left.index - right.index;
  }), 'value');
}

// An internal function used for aggregate "group by" operations.
function group(behavior, partition) {
  return function(obj, iteratee, context) {
    var result = partition ? [[], []] : {};
    iteratee = cb(iteratee, context);
    each(obj, function(value, index) {
      var key = iteratee(value, index, obj);
      behavior(result, value, key);
    });
    return result;
  };
}

// Groups the object's values by a criterion. Pass either a string attribute
// to group by, or a function that returns the criterion.
var groupBy = group(function(result, value, key) {
  if (has$1(result, key)) result[key].push(value); else result[key] = [value];
});

// Indexes the object's values by a criterion, similar to `_.groupBy`, but for
// when you know that your index values will be unique.
var indexBy = group(function(result, value, key) {
  result[key] = value;
});

// Counts instances of an object that group by a certain criterion. Pass
// either a string attribute to count by, or a function that returns the
// criterion.
var countBy = group(function(result, value, key) {
  if (has$1(result, key)) result[key]++; else result[key] = 1;
});

// Split a collection into two arrays: one whose elements all pass the given
// truth test, and one whose elements all do not pass the truth test.
var partition = group(function(result, value, pass) {
  result[pass ? 0 : 1].push(value);
}, true);

// Return the number of elements in a collection.
function size(obj) {
  if (obj == null) return 0;
  return isArrayLike(obj) ? obj.length : keys(obj).length;
}

// Internal `_.pick` helper function to determine whether `key` is an enumerable
// property name of `obj`.
function keyInObj(value, key, obj) {
  return key in obj;
}

// Return a copy of the object only containing the allowed properties.
var pick = restArguments(function(obj, keys) {
  var result = {}, iteratee = keys[0];
  if (obj == null) return result;
  if (isFunction$1(iteratee)) {
    if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]);
    keys = allKeys(obj);
  } else {
    iteratee = keyInObj;
    keys = flatten$1(keys, false, false);
    obj = Object(obj);
  }
  for (var i = 0, length = keys.length; i < length; i++) {
    var key = keys[i];
    var value = obj[key];
    if (iteratee(value, key, obj)) result[key] = value;
  }
  return result;
});

// Return a copy of the object without the disallowed properties.
var omit = restArguments(function(obj, keys) {
  var iteratee = keys[0], context;
  if (isFunction$1(iteratee)) {
    iteratee = negate(iteratee);
    if (keys.length > 1) context = keys[1];
  } else {
    keys = map(flatten$1(keys, false, false), String);
    iteratee = function(value, key) {
      return !contains(keys, key);
    };
  }
  return pick(obj, iteratee, context);
});

// Returns everything but the last entry of the array. Especially useful on
// the arguments object. Passing **n** will return all the values in
// the array, excluding the last N.
function initial(array, n, guard) {
  return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
}

// Get the first element of an array. Passing **n** will return the first N
// values in the array. The **guard** check allows it to work with `_.map`.
function first(array, n, guard) {
  if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
  if (n == null || guard) return array[0];
  return initial(array, array.length - n);
}

// Returns everything but the first entry of the `array`. Especially useful on
// the `arguments` object. Passing an **n** will return the rest N values in the
// `array`.
function rest(array, n, guard) {
  return slice.call(array, n == null || guard ? 1 : n);
}

// Get the last element of an array. Passing **n** will return the last N
// values in the array.
function last(array, n, guard) {
  if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
  if (n == null || guard) return array[array.length - 1];
  return rest(array, Math.max(0, array.length - n));
}

// Trim out all falsy values from an array.
function compact(array) {
  return filter(array, Boolean);
}

// Flatten out an array, either recursively (by default), or up to `depth`.
// Passing `true` or `false` as `depth` means `1` or `Infinity`, respectively.
function flatten(array, depth) {
  return flatten$1(array, depth, false);
}

// Take the difference between one array and a number of other arrays.
// Only the elements present in just the first array will remain.
var difference = restArguments(function(array, rest) {
  rest = flatten$1(rest, true, true);
  return filter(array, function(value){
    return !contains(rest, value);
  });
});

// Return a version of the array that does not contain the specified value(s).
var without = restArguments(function(array, otherArrays) {
  return difference(array, otherArrays);
});

// Produce a duplicate-free version of the array. If the array has already
// been sorted, you have the option of using a faster algorithm.
// The faster algorithm will not work with an iteratee if the iteratee
// is not a one-to-one function, so providing an iteratee will disable
// the faster algorithm.
function uniq(array, isSorted, iteratee, context) {
  if (!isBoolean(isSorted)) {
    context = iteratee;
    iteratee = isSorted;
    isSorted = false;
  }
  if (iteratee != null) iteratee = cb(iteratee, context);
  var result = [];
  var seen = [];
  for (var i = 0, length = getLength(array); i < length; i++) {
    var value = array[i],
        computed = iteratee ? iteratee(value, i, array) : value;
    if (isSorted && !iteratee) {
      if (!i || seen !== computed) result.push(value);
      seen = computed;
    } else if (iteratee) {
      if (!contains(seen, computed)) {
        seen.push(computed);
        result.push(value);
      }
    } else if (!contains(result, value)) {
      result.push(value);
    }
  }
  return result;
}

// Produce an array that contains the union: each distinct element from all of
// the passed-in arrays.
var union = restArguments(function(arrays) {
  return uniq(flatten$1(arrays, true, true));
});

// Produce an array that contains every item shared between all the
// passed-in arrays.
function intersection(array) {
  var result = [];
  var argsLength = arguments.length;
  for (var i = 0, length = getLength(array); i < length; i++) {
    var item = array[i];
    if (contains(result, item)) continue;
    var j;
    for (j = 1; j < argsLength; j++) {
      if (!contains(arguments[j], item)) break;
    }
    if (j === argsLength) result.push(item);
  }
  return result;
}

// Complement of zip. Unzip accepts an array of arrays and groups
// each array's elements on shared indices.
function unzip(array) {
  var length = (array && max(array, getLength).length) || 0;
  var result = Array(length);

for (var index = 0; index < length; index++) {
    result[index] = pluck(array, index);
  }
  return result;
}

// Zip together multiple lists into a single array -- elements that share
// an index go together.
var zip = restArguments(unzip);

// Converts lists into objects. Pass either a single array of `[key, value]`
// pairs, or two parallel arrays of the same length -- one of keys, and one of
// the corresponding values. Passing by pairs is the reverse of `_.pairs`.
function object(list, values) {
  var result = {};
  for (var i = 0, length = getLength(list); i < length; i++) {
    if (values) {
      result[list[i]] = values[i];
    } else {
      result[list[i][0]] = list[i][1];
    }
  }
  return result;
}

// Generate an integer Array containing an arithmetic progression. A port of
// the native Python `range()` function. See
// [the Python documentation](https://docs.python.org/library/functions.html#range).
function range(start, stop, step) {
  if (stop == null) {
    stop = start || 0;
    start = 0;
  }
  if (!step) {
    step = stop < start ? -1 : 1;
  }

var length = Math.max(Math.ceil((stop - start) / step), 0);
  var range = Array(length);

for (var idx = 0; idx < length; idx++, start += step) {
    range[idx] = start;
  }

return range;
}

// Chunk a single array into multiple arrays, each containing `count` or fewer
// items.
function chunk(array, count) {
  if (count == null || count < 1) return [];
  var result = [];
  var i = 0, length = array.length;
  while (i < length) {
    result.push(slice.call(array, i, i += count));
  }
  return result;
}

// Helper function to continue chaining intermediate results.
function chainResult(instance, obj) {
  return instance._chain ? _$1(obj).chain() : obj;
}

// Add your own custom functions to the Underscore object.
function mixin(obj) {
  each(functions(obj), function(name) {
    var func = _$1[name] = obj[name];
    _$1.prototype[name] = function() {
      var args = [this._wrapped];
      push.apply(args, arguments);
      return chainResult(this, func.apply(_$1, args));
    };
  });
  return _$1;
}

// Add all mutator `Array` functions to the wrapper.
each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
  var method = ArrayProto[name];
  _$1.prototype[name] = function() {
    var obj = this._wrapped;
    if (obj != null) {
      method.apply(obj, arguments);
      if ((name === 'shift' || name === 'splice') && obj.length === 0) {
        delete obj[0];
      }
    }
    return chainResult(this, obj);
  };
});

// Add all accessor `Array` functions to the wrapper.
each(['concat', 'join', 'slice'], function(name) {
  var method = ArrayProto[name];
  _$1.prototype[name] = function() {
    var obj = this._wrapped;
    if (obj != null) obj = method.apply(obj, arguments);
    return chainResult(this, obj);
  };
});

// Named Exports

var allExports = {
  __proto__: null,
  VERSION: VERSION,
  restArguments: restArguments,
  isObject: isObject,
  isNull: isNull,
  isUndefined: isUndefined,
  isBoolean: isBoolean,
  isElement: isElement,
  isString: isString,
  isNumber: isNumber,
  isDate: isDate,
  isRegExp: isRegExp,
  isError: isError,
  isSymbol: isSymbol,
  isArrayBuffer: isArrayBuffer,
  isDataView: isDataView$1,
  isArray: isArray,
  isFunction: isFunction$1,
  isArguments: isArguments$1,
  isFinite: isFinite$1,
  isNaN: isNaN$1,
  isTypedArray: isTypedArray$1,
  isEmpty: isEmpty,
  isMatch: isMatch,
  isEqual: isEqual,
  isMap: isMap,
  isWeakMap: isWeakMap,
  isSet: isSet,
  isWeakSet: isWeakSet,
  keys: keys,
  allKeys: allKeys,
  values: values,
  pairs: pairs,
  invert: invert,
  functions: functions,
  methods: functions,
  extend: extend,
  extendOwn: extendOwn,
  assign: extendOwn,
  defaults: defaults,
  create: create,
  clone: clone,
  tap: tap,
  get: get,
  has: has,
  mapObject: mapObject,
  identity: identity,
  constant: constant,
  noop: noop,
  toPath: toPath$1,
  property: property,
  propertyOf: propertyOf,
  matcher: matcher,
  matches: matcher,
  times: times,
  random: random,
  now: now,
  escape: _escape,
  unescape: _unescape,
  templateSettings: templateSettings,
  template: template,
  result: result,
  uniqueId: uniqueId,
  chain: chain,
  iteratee: iteratee,
  partial: partial,
  bind: bind,
  bindAll: bindAll,
  memoize: memoize,
  delay: delay,
  defer: defer,
  throttle: throttle,
  debounce: debounce,
  wrap: wrap,
  negate: negate,
  compose: compose,
  after: after,
  before: before,
  once: once,
  findKey: findKey,
  findIndex: findIndex,
  findLastIndex: findLastIndex,
  sortedIndex: sortedIndex,
  indexOf: indexOf,
  lastIndexOf: lastIndexOf,
  find: find,
  detect: find,
  findWhere: findWhere,
  each: each,
  forEach: each,
  map: map,
  collect: map,
  reduce: reduce,
  foldl: reduce,
  inject: reduce,
  reduceRight: reduceRight,
  foldr: reduceRight,
  filter: filter,
  select: filter,
  reject: reject,
  every: every,
  all: every,
  some: some,
  any: some,
  contains: contains,
  includes: contains,
  include: contains,
  invoke: invoke,
  pluck: pluck,
  where: where,
  max: max,
  min: min,
  shuffle: shuffle,
  sample: sample,
  sortBy: sortBy,
  groupBy: groupBy,
  indexBy: indexBy,
  countBy: countBy,
  partition: partition,
  toArray: toArray,
  size: size,
  pick: pick,
  omit: omit,
  first: first,
  head: first,
  take: first,
  initial: initial,
  last: last,
  rest: rest,
  tail: rest,
  drop: rest,
  compact: compact,
  flatten: flatten,
  without: without,
  uniq: uniq,
  unique: uniq,
  union: union,
  intersection: intersection,
  difference: difference,
  unzip: unzip,
  transpose: unzip,
  zip: zip,
  object: object,
  range: range,
  chunk: chunk,
  mixin: mixin,
  'default': _$1
};

// Default Export

// Add all of the Underscore functions to the wrapper object.
var _ = mixin(allExports);
// Legacy Node.js API.
_._ = _;

exports.VERSION = VERSION;
exports._ = _;
exports._escape = _escape;
exports._unescape = _unescape;
exports.after = after;
exports.allKeys = allKeys;
exports.before = before;
exports.bind = bind;
exports.bindAll = bindAll;
exports.chain = chain;
exports.chunk = chunk;
exports.clone = clone;
exports.compact = compact;
exports.compose = compose;
exports.constant = constant;
exports.contains = contains;
exports.countBy = countBy;
exports.create = create;
exports.debounce = debounce;
exports.defaults = defaults;
exports.defer = defer;
exports.delay = delay;
exports.difference = difference;
exports.each = each;
exports.every = every;
exports.extend = extend;
exports.extendOwn = extendOwn;
exports.filter = filter;
exports.find = find;
exports.findIndex = findIndex;
exports.findKey = findKey;
exports.findLastIndex = findLastIndex;
exports.findWhere = findWhere;
exports.first = first;
exports.flatten = flatten;
exports.functions = functions;
exports.get = get;
exports.groupBy = groupBy;
exports.has = has;
exports.identity = identity;
exports.indexBy = indexBy;
exports.indexOf = indexOf;
exports.initial = initial;
exports.intersection = intersection;
exports.invert = invert;
exports.invoke = invoke;
exports.isArguments = isArguments$1;
exports.isArray = isArray;
exports.isArrayBuffer = isArrayBuffer;
exports.isBoolean = isBoolean;
exports.isDataView = isDataView$1;
exports.isDate = isDate;
exports.isElement = isElement;
exports.isEmpty = isEmpty;
exports.isEqual = isEqual;
exports.isError = isError;
exports.isFinite = isFinite$1;
exports.isFunction = isFunction$1;
exports.isMap = isMap;
exports.isMatch = isMatch;
exports.isNaN = isNaN$1;
exports.isNull = isNull;
exports.isNumber = isNumber;
exports.isObject = isObject;
exports.isRegExp = isRegExp;
exports.isSet = isSet;
exports.isString = isString;
exports.isSymbol = isSymbol;
exports.isTypedArray = isTypedArray$1;
exports.isUndefined = isUndefined;
exports.isWeakMap = isWeakMap;
exports.isWeakSet = isWeakSet;
exports.iteratee = iteratee;
exports.keys = keys;
exports.last = last;
exports.lastIndexOf = lastIndexOf;
exports.map = map;
exports.mapObject = mapObject;
exports.matcher = matcher;
exports.max = max;
exports.memoize = memoize;
exports.min = min;
exports.mixin = mixin;
exports.negate = negate;
exports.noop = noop;
exports.now = now;
exports.object = object;
exports.omit = omit;
exports.once = once;
exports.pairs = pairs;
exports.partial = partial;
exports.partition = partition;
exports.pick = pick;
exports.pluck = pluck;
exports.property = property;
exports.propertyOf = propertyOf;
exports.random = random;
exports.range = range;
exports.reduce = reduce;
exports.reduceRight = reduceRight;
exports.reject = reject;
exports.rest = rest;
exports.restArguments = restArguments;
exports.result = result;
exports.sample = sample;
exports.shuffle = shuffle;
exports.size = size;
exports.some = some;
exports.sortBy = sortBy;
exports.sortedIndex = sortedIndex;
exports.tap = tap;
exports.template = template;
exports.templateSettings = templateSettings;
exports.throttle = throttle;
exports.times = times;
exports.toArray = toArray;
exports.toPath = toPath$1;
exports.union = union;
exports.uniq = uniq;
exports.uniqueId = uniqueId;
exports.unzip = unzip;
exports.values = values;
exports.where = where;
exports.without = without;
exports.wrap = wrap;
exports.zip = zip;
//# sourceMappingURL=underscore-node-f.cjs.map

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