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| 'use strict';
| var anObject = require('../internals/an-object');
|
| // `Map.prototype.emplace` method
| // https://github.com/thumbsupep/proposal-upsert
| module.exports = function emplace(key, handler) {
| var map = anObject(this);
| var value = (map.has(key) && 'update' in handler)
| ? handler.update(map.get(key), key, map)
| : handler.insert(key, map);
| map.set(key, value);
| return value;
| };
|
|
