| 1 | Counts values which satisfy a test.
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| 2 | [:package:](https://www.npmjs.com/package/@extra-array/count)
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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/count)
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| 5 | [:vhs:](https://asciinema.org/a/332033)
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| 6 | [:moon:](https://www.npmjs.com/package/@extra-array/count.min)
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| 7 | [:scroll:](https://unpkg.com/@extra-array/count/)
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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: [count], [countAs].<br>
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| 12 | > Similar: [count], [partition].
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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.count(x, ft);
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| 22 | // x: an array
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| 23 | // ft: test function (v, i, x)
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| 24 | ```
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| 25 |
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| 26 | ```javascript
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| 27 | const array = require("extra-array");
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| 28 |
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| 29 | var x = [1, 1, 2, 2, 4];
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| 30 | array.count(x, v => v % 2 === 1);
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| 31 | // 2
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| 32 |
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| 33 | array.count(x, v => v % 2 === 0);
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| 34 | // 3
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| 35 | ```
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| 36 |
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| 37 | <br>
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| 38 | <br>
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| 39 |
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| 40 |
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| 41 | ## References
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| 42 |
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| 43 | - [List-Extra.count: elm](https://package.elm-lang.org/packages/elm-community/list-extra/7.1.0/List-Extra#count)
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| 44 | - [_.countBy: lodash](https://lodash.com/docs/4.17.15#countBy)
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| 45 | - [Array.count: sugarjs](https://sugarjs.com/docs/#/Array/count)
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| 46 | - [count-iterable-values: @zeke](https://www.npmjs.com/package/count-iterable-values)
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| 47 |
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| 48 | [count]: https://github.com/nodef/extra-array/wiki/count
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| 49 | [countAs]: https://github.com/nodef/extra-array/wiki/countAs
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| 50 | [partition]: https://github.com/nodef/extra-array/wiki/partition
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