| 1 | Gives values not present in both arrays.
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| 2 | [:package:](https://www.npmjs.com/package/@extra-array/symmetric-difference)
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| 3 | [:smiley_cat:](https://github.com/orgs/nodef/packages?repo_name=extra-array)
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| 4 | [:running:](https://npm.runkit.com/@extra-array/symmetric-difference)
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| 5 | [:vhs:](https://asciinema.org/a/339833)
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| 6 | [:moon:](https://www.npmjs.com/package/@extra-array/symmetric-difference.min)
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| 7 | [:scroll:](https://unpkg.com/@extra-array/symmetric-difference/)
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| 8 | [:newspaper:](https://nodef.github.io/extra-array/)
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| 9 | [:blue_book:](https://github.com/nodef/extra-array/wiki/)
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| 10 |
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| 11 | > Similar: [union], [intersection], [difference], [symmetricDifference].
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| 12 |
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| 13 | > This is part of package [extra-array].
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| 14 |
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| 15 | [extra-array]: https://www.npmjs.com/package/extra-array
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| 16 |
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| 17 | <br>
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| 18 |
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| 19 | ```javascript
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| 20 | array.symmetricDifference(x, y, [fc], [fm]);
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| 21 | // x: an array
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| 22 | // y: another array
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| 23 | // fc: compare function (a, b)
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| 24 | // fm: map function (v, i, x)
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| 25 | ```
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| 26 | > :stopwatch: Compare function => O(n²).
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| 27 |
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| 28 | ```javascript
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| 29 | const array = require("extra-array");
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| 30 |
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| 31 | var x = [1, 2, 3, 4];
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| 32 | var y = [3, 4, 5];
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| 33 | array.symmetricDifference(x, y);
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| 34 | // [ 1, 2, 5 ]
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| 35 |
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| 36 | var y = [-3, -4, -5];
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| 37 | array.symmetricDifference(x, y);
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| 38 | // [
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| 39 | // 1, 2, 3, 4,
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| 40 | // -3, -4, -5
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| 41 | // ]
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| 42 |
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| 43 | array.symmetricDifference(x, y, (a, b) => Math.abs(a) - Math.abs(b));
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| 44 | // [ 1, 2, -5 ]
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| 45 |
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| 46 | array.symmetricDifference(x, y, null, v => Math.abs(v));
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| 47 | // [ 1, 2, -5 ]
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| 48 | ```
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| 49 |
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| 50 | <br>
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| 51 | <br>
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| 52 |
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| 53 |
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| 54 | ## References
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| 55 |
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| 56 | - [Data.List.\\: Haskell](https://hackage.haskell.org/package/base-4.12.0.0/docs/Data-List.html#v:-92--92-)
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| 57 | - [Data.Set.difference: Haskell](http://hackage.haskell.org/package/containers-0.6.2.1/docs/Data-Set.html#v:difference)
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| 58 | - [Set.difference: Python](https://www.programiz.com/python-programming/methods/set/difference)
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| 59 |
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| 60 | [union]: https://github.com/nodef/extra-array/wiki/union
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| 61 | [intersection]: https://github.com/nodef/extra-array/wiki/intersection
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| 62 | [difference]: https://github.com/nodef/extra-array/wiki/difference
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| 63 | [symmetricDifference]: https://github.com/nodef/extra-array/wiki/symmetricDifference
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