| 1 | var unique = require('./unique');
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| 2 | var filter = require('./filter');
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| 3 | var contains = require('./contains');
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| 4 |
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| 5 |
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| 6 | /**
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| 7 | * Exclusive OR. Returns items that are present in a single array.
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| 8 | * - like ptyhon's `symmetric_difference`
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| 9 | */
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| 10 | function xor(arr1, arr2) {
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| 11 | arr1 = unique(arr1);
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| 12 | arr2 = unique(arr2);
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| 13 |
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| 14 | var a1 = filter(arr1, function(item){
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| 15 | return !contains(arr2, item);
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| 16 | }),
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| 17 | a2 = filter(arr2, function(item){
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| 18 | return !contains(arr1, item);
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| 19 | });
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| 20 |
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| 21 | return a1.concat(a2);
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| 22 | }
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| 23 |
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| 24 | module.exports = xor;
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| 25 |
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| 26 |
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