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1 | 'use strict';
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2 | var $ = require('../internals/export');
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3 | var IS_PURE = require('../internals/is-pure');
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4 | var anObject = require('../internals/an-object');
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5 | var aFunction = require('../internals/a-function');
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6 | var iterate = require('../internals/iterate');
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7 |
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8 | // `Map.prototype.merge` method
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9 | // https://github.com/tc39/proposal-collection-methods
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10 | $({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {
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11 | // eslint-disable-next-line no-unused-vars -- required for `.length`
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12 | merge: function merge(iterable /* ...iterbles */) {
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13 | var map = anObject(this);
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14 | var setter = aFunction(map.set);
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15 | var argumentsLength = arguments.length;
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16 | var i = 0;
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17 | while (i < argumentsLength) {
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18 | iterate(arguments[i++], setter, { that: map, 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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