77 lines
2 KiB
JavaScript
77 lines
2 KiB
JavaScript
'use strict';
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var hasSymbols = require('has-symbols')();
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var ES2015 = require('./es2015');
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var assign = require('./helpers/assign');
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var callBound = require('./helpers/callBound');
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var $arrayPush = callBound('Array.prototype.push');
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var $arraySlice = callBound('Array.prototype.slice');
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var $arrayJoin = callBound('Array.prototype.join');
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var ES2016 = assign(assign({}, ES2015), {
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// https://www.ecma-international.org/ecma-262/7.0/#sec-samevaluenonnumber
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SameValueNonNumber: function SameValueNonNumber(x, y) {
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if (typeof x === 'number' || typeof x !== typeof y) {
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throw new TypeError('SameValueNonNumber requires two non-number values of the same type.');
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}
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return this.SameValue(x, y);
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},
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// https://www.ecma-international.org/ecma-262/7.0/#sec-iterabletoarraylike
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IterableToArrayLike: function IterableToArrayLike(items) {
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var usingIterator;
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if (hasSymbols) {
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usingIterator = this.GetMethod(items, Symbol.iterator);
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} else if (this.IsArray(items)) {
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usingIterator = function () {
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var i = -1;
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var arr = this; // eslint-disable-line no-invalid-this
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return {
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next: function () {
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i += 1;
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return {
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done: i >= arr.length,
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value: arr[i]
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};
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}
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};
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};
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} else if (this.Type(items) === 'String') {
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var ES = this;
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usingIterator = function () {
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var i = 0;
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return {
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next: function () {
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var nextIndex = ES.AdvanceStringIndex(items, i, true);
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var value = $arrayJoin($arraySlice(items, i, nextIndex), '');
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i = nextIndex;
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return {
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done: nextIndex > items.length,
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value: value
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};
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}
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};
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};
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}
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if (typeof usingIterator !== 'undefined') {
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var iterator = this.GetIterator(items, usingIterator);
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var values = [];
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var next = true;
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while (next) {
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next = this.IteratorStep(iterator);
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if (next) {
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var nextValue = this.IteratorValue(next);
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$arrayPush(values, nextValue);
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}
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}
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return values;
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}
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return this.ToObject(items);
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}
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});
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module.exports = ES2016;
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