158 lines
4.4 KiB
JavaScript
158 lines
4.4 KiB
JavaScript
'use strict';
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var ctx = require('./_ctx');
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var $export = require('./_export');
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var createDesc = require('./_property-desc');
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var assign = require('./_object-assign');
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var create = require('./_object-create');
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var getPrototypeOf = require('./_object-gpo');
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var getKeys = require('./_object-keys');
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var dP = require('./_object-dp');
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var keyOf = require('./_keyof');
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var aFunction = require('./_a-function');
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var forOf = require('./_for-of');
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var isIterable = require('./core.is-iterable');
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var $iterCreate = require('./_iter-create');
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var step = require('./_iter-step');
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var isObject = require('./_is-object');
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var toIObject = require('./_to-iobject');
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var DESCRIPTORS = require('./_descriptors');
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var has = require('./_has');
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// 0 -> Dict.forEach
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// 1 -> Dict.map
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// 2 -> Dict.filter
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// 3 -> Dict.some
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// 4 -> Dict.every
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// 5 -> Dict.find
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// 6 -> Dict.findKey
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// 7 -> Dict.mapPairs
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var createDictMethod = function (TYPE) {
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var IS_MAP = TYPE == 1;
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var IS_EVERY = TYPE == 4;
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return function (object, callbackfn, that /* = undefined */) {
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var f = ctx(callbackfn, that, 3);
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var O = toIObject(object);
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var result = IS_MAP || TYPE == 7 || TYPE == 2
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? new (typeof this == 'function' ? this : Dict)() : undefined;
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var key, val, res;
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for (key in O) if (has(O, key)) {
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val = O[key];
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res = f(val, key, object);
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if (TYPE) {
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if (IS_MAP) result[key] = res; // map
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else if (res) switch (TYPE) {
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case 2: result[key] = val; break; // filter
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case 3: return true; // some
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case 5: return val; // find
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case 6: return key; // findKey
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case 7: result[res[0]] = res[1]; // mapPairs
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} else if (IS_EVERY) return false; // every
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}
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}
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return TYPE == 3 || IS_EVERY ? IS_EVERY : result;
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};
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};
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var findKey = createDictMethod(6);
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var createDictIter = function (kind) {
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return function (it) {
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return new DictIterator(it, kind);
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};
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};
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var DictIterator = function (iterated, kind) {
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this._t = toIObject(iterated); // target
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this._a = getKeys(iterated); // keys
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this._i = 0; // next index
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this._k = kind; // kind
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};
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$iterCreate(DictIterator, 'Dict', function () {
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var that = this;
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var O = that._t;
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var keys = that._a;
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var kind = that._k;
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var key;
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do {
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if (that._i >= keys.length) {
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that._t = undefined;
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return step(1);
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}
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} while (!has(O, key = keys[that._i++]));
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if (kind == 'keys') return step(0, key);
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if (kind == 'values') return step(0, O[key]);
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return step(0, [key, O[key]]);
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});
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function Dict(iterable) {
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var dict = create(null);
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if (iterable != undefined) {
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if (isIterable(iterable)) {
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forOf(iterable, true, function (key, value) {
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dict[key] = value;
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});
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} else assign(dict, iterable);
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}
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return dict;
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}
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Dict.prototype = null;
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function reduce(object, mapfn, init) {
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aFunction(mapfn);
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var O = toIObject(object);
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var keys = getKeys(O);
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var length = keys.length;
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var i = 0;
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var memo, key;
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if (arguments.length < 3) {
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if (!length) throw TypeError('Reduce of empty object with no initial value');
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memo = O[keys[i++]];
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} else memo = Object(init);
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while (length > i) if (has(O, key = keys[i++])) {
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memo = mapfn(memo, O[key], key, object);
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}
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return memo;
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}
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function includes(object, el) {
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// eslint-disable-next-line no-self-compare
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return (el == el ? keyOf(object, el) : findKey(object, function (it) {
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// eslint-disable-next-line no-self-compare
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return it != it;
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})) !== undefined;
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}
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function get(object, key) {
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if (has(object, key)) return object[key];
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}
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function set(object, key, value) {
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if (DESCRIPTORS && key in Object) dP.f(object, key, createDesc(0, value));
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else object[key] = value;
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return object;
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}
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function isDict(it) {
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return isObject(it) && getPrototypeOf(it) === Dict.prototype;
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}
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$export($export.G + $export.F, { Dict: Dict });
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$export($export.S, 'Dict', {
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keys: createDictIter('keys'),
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values: createDictIter('values'),
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entries: createDictIter('entries'),
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forEach: createDictMethod(0),
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map: createDictMethod(1),
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filter: createDictMethod(2),
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some: createDictMethod(3),
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every: createDictMethod(4),
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find: createDictMethod(5),
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findKey: findKey,
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mapPairs: createDictMethod(7),
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reduce: reduce,
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keyOf: keyOf,
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includes: includes,
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has: has,
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get: get,
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set: set,
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isDict: isDict
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});
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