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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 getBuiltIn = require('../internals/get-built-in');
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5 | var anObject = require('../internals/an-object');
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6 | var aFunction = require('../internals/a-function');
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7 | var speciesConstructor = require('../internals/species-constructor');
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8 | var iterate = require('../internals/iterate');
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9 |
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10 | // `Set.prototype.symmetricDifference` method
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11 | // https://github.com/tc39/proposal-set-methods
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12 | $({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {
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13 | symmetricDifference: function symmetricDifference(iterable) {
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14 | var set = anObject(this);
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15 | var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set);
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16 | var remover = aFunction(newSet['delete']);
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17 | var adder = aFunction(newSet.add);
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18 | iterate(iterable, function (value) {
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19 | remover.call(newSet, value) || adder.call(newSet, value);
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20 | });
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21 | return newSet;
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22 | }
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23 | });
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