| 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var aMap = require('../internals/a-map');
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| 4 | var iterate = require('../internals/iterate');
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| 5 | var set = require('../internals/map-helpers').set;
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| 6 |
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| 7 | // `Map.prototype.merge` method
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| 8 | // https://github.com/tc39/proposal-collection-methods
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| 9 | $({ target: 'Map', proto: true, real: true, arity: 1, forced: true }, {
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| 10 |
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| 11 | merge: function merge(iterable /* ...iterables */) {
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| 12 | var map = aMap(this);
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| 13 | var argumentsLength = arguments.length;
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| 14 | var i = 0;
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| 15 | while (i < argumentsLength) {
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| 16 | iterate(arguments[i++], function (key, value) {
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| 17 | set(map, key, value);
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| 18 | }, { AS_ENTRIES: true });
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| 19 | }
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| 20 | return map;
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| 21 | }
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| 22 | });
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