| 1 | Appends values from arrays.
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| 2 | [:package:](https://www.npmjs.com/package/@extra-array/concat-update)
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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/concat-update)
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| 5 | [:vhs:](https://asciinema.org/a/332027)
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| 6 | [:moon:](https://www.npmjs.com/package/@extra-array/concat-update.min)
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| 7 | [:scroll:](https://unpkg.com/@extra-array/concat-update/)
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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 | > Alternatives: [concat], [concat$].<br>
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| 12 | > Similar: [concat], [join].
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| 13 |
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| 14 | > This is part of package [extra-array].
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| 15 |
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| 16 | [extra-array]: https://www.npmjs.com/package/extra-array
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| 17 |
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| 18 | <br>
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| 19 |
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| 20 | ```javascript
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| 21 | array.concat$(x, ...ys);
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| 22 | // x: an array (updated)
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| 23 | // ys: arrays to append
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| 24 | // → x
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| 25 | ```
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| 26 |
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| 27 | ```javascript
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| 28 | const array = require("extra-array");
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| 29 |
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| 30 | var x = [1, 2];
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| 31 | var y = [3, 4];
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| 32 | array.concat$(x, y);
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| 33 | // [ 1, 2, 3, 4 ]
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| 34 |
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| 35 | x;
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| 36 | // [ 1, 2, 3, 4 ]
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| 37 |
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| 38 | var x = [1, 2];
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| 39 | array.concat$(x, y, y);
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| 40 | // [ 1, 2, 3, 4, 3, 4 ]
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| 41 | ```
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| 42 |
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| 43 | <br>
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| 44 | <br>
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| 45 |
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| 46 |
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| 47 | ## References
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| 48 |
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| 49 | - [Array.prototype.concat: MDN web docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/concat)
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| 50 | - [_.concat: lodash](https://lodash.com/docs/4.17.15#concat)
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| 51 | - [Array.append: sugarjs](https://sugarjs.com/docs/#/Array/append)
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| 52 |
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| 53 | [concat]: https://github.com/nodef/extra-array/wiki/concat
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| 54 | [concat$]: https://github.com/nodef/extra-array/wiki/concat$
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| 55 | [join]: https://github.com/nodef/extra-array/wiki/join
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