92 lines
2.5 KiB
JavaScript
92 lines
2.5 KiB
JavaScript
////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2016 Realm Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////
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'use strict';
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var arrayPrototype = Array.prototype;
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// eslint-disable-next-line no-undef
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var iteratorSymbol = typeof Symbol != 'undefined' && Symbol.iterator;
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var iteratorPrototype = {};
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if (iteratorSymbol) {
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// These iterators should themselves be iterable.
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Object.defineProperty(iteratorPrototype, iteratorSymbol, {
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value: function() {
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return this;
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}
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});
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}
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[
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'join',
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'slice',
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'forEach',
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'every',
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'some',
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'find',
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'findIndex',
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'map',
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'reduce',
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'reduceRight',
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].forEach(function(methodName) {
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var method = arrayPrototype[methodName];
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if (method) {
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exports[methodName] = {value: method};
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}
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});
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['entries', 'keys', 'values'].forEach(function(methodName) {
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var method = function() {
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var self = this;
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var index = 0;
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return Object.create(iteratorPrototype, {
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next: {
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value: function() {
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if (!self || index >= self.length) {
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self = null;
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return {done: true, value: undefined};
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}
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var value;
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switch (methodName) {
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case 'entries':
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value = [index, self[index]];
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break;
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case 'keys':
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value = index;
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break;
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default:
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value = self[index];
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}
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index++;
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return {done: false, value: value};
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}
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}
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});
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};
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exports[methodName] = {value: method};
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});
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if (iteratorSymbol) {
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exports[iteratorSymbol] = exports.values;
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}
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