forked from lix-project/lix-website
21 lines
671 B
JavaScript
21 lines
671 B
JavaScript
'use strict';
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var CreateDataPropertyOrThrow = require('es-abstract/2024/CreateDataPropertyOrThrow');
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var OrdinaryObjectCreate = require('es-abstract/2024/OrdinaryObjectCreate');
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var forEach = require('es-abstract/helpers/forEach');
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var GroupBy = require('es-abstract/2024/GroupBy'); // TODO: replace with es-abstract 2024 implementation
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module.exports = function groupBy(items, callbackfn) {
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var groups = GroupBy(items, callbackfn, 'PROPERTY'); // step 1
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var obj = OrdinaryObjectCreate(null); // step 2
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forEach(groups, function (g) { // step 3
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CreateDataPropertyOrThrow(obj, g['[[Key]]'], g['[[Elements]]']); // steps 3.a - 3.b
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});
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return obj; // step 4
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};
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