Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// Copyright (C) 2015 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-map.prototype.forEach description: > New keys are visited if created during forEach execution. info: | Map.prototype.forEach ( callbackfn [ , thisArg ] ) ... 5. If thisArg was supplied, let T be thisArg; else let T be undefined. 6. Let entries be the List that is the value of M’s [[MapData]] internal slot. 7. Repeat for each Record {[[key]], [[value]]} e that is an element of entries, in original key insertion order a. If e.[[key]] is not empty, then i. Let funcResult be Call(callbackfn, T, «e.[[value]], e.[[key]], M»). ii. ReturnIfAbrupt(funcResult). ... ---*/ var map = new Map(); map.set('foo', 0); map.set('bar', 1); var count = 0; var results = []; map.forEach(function(value, key) { if (count === 0) { map.set('baz', 2); } results.push({ value: value, key: key }); count++; }); assert.sameValue(count, 3); assert.sameValue(map.size, 3); assert.sameValue(results[0].key, 'foo'); assert.sameValue(results[0].value, 0); assert.sameValue(results[1].key, 'bar'); assert.sameValue(results[1].value, 1); assert.sameValue(results[2].key, 'baz'); assert.sameValue(results[2].value, 2);