mirror of https://github.com/tc39/test262.git
27 lines
529 B
JavaScript
27 lines
529 B
JavaScript
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// Copyright (c) 2023 Ecma International. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-map.groupby
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description: Map.groupBy returns a Map instance
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info: |
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Map.groupBy ( items, callbackfn )
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...
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2. Let map be ! Construct(%Map%).
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...
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4. Return map.
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...
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features: [array-grouping, Map]
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---*/
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const array = [1, 2, 3];
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const map = Map.groupBy(array, function (i) {
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return i % 2 === 0 ? 'even' : 'odd';
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});
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assert.sameValue(map instanceof Map, true);
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