mirror of
https://github.com/musix-org/musix-oss
synced 2024-12-23 19:23:18 +00:00
19 lines
666 B
JavaScript
19 lines
666 B
JavaScript
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'use strict';
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var $ = require('../internals/export');
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var IS_PURE = require('../internals/is-pure');
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var anObject = require('../internals/an-object');
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var aFunction = require('../internals/a-function');
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// `Set.prototype.updateOrInsert` method
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// https://docs.google.com/presentation/d/1_xtrGSoN1-l2Q74eCXPHBbbrBHsVyqArWN0ebnW-pVQ/
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$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {
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updateOrInsert: function updateOrInsert(key, onUpdate, onInsert) {
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var map = anObject(this);
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aFunction(onUpdate);
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aFunction(onInsert);
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var value = map.has(key) ? onUpdate(map.get(key)) : onInsert();
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map.set(key, value);
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return value;
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}
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});
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