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Last change
on this file since e29cc2e was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
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| 1 | 'use strict';
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| 2 | var anObject = require('../internals/an-object');
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| 3 |
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| 4 | // `Map.prototype.emplace` method
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| 5 | // https://github.com/thumbsupep/proposal-upsert
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| 6 | module.exports = function emplace(key, handler) {
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| 7 | var map = anObject(this);
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| 8 | var value = (map.has(key) && 'update' in handler)
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| 9 | ? handler.update(map.get(key), key, map)
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| 10 | : handler.insert(key, map);
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| 11 | map.set(key, value);
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| 12 | return value;
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| 13 | };
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