@extra-array/filter-at/README.md

Keeps values at given indices only.

Keeps values at given indices only.
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> Alternatives: [filter], [filter$], [filterAt].<br>
> Similar: [map], [filter], [reject], [reduce], [accumulate].

> This is part of package [extra-array].

[extra-array]: https://www.npmjs.com/package/extra-array

<br>

```javascript
array.filterAt(x, is);
// x:  an array (updated)
// is: indices (sorted)
// → x
```

```javascript
const array = require("extra-array");

var x = [2, 4, 6, 8];
array.filterAt(x, [1, 2]);
// [ 4, 6 ]

array.filterAt(x, [1, 3]);
// [ 4, 8 ]
```

<br>
<br>


## References

- [iterableList.get: Java](https://docs.oracle.com/javase/7/docs/api/java/util/iterableList.html#get(int))

[filter]: https://github.com/nodef/extra-array/wiki/filter
[filter$]: https://github.com/nodef/extra-array/wiki/filter$
[filterAt]: https://github.com/nodef/extra-array/wiki/filterAt
[map]: https://github.com/nodef/extra-array/wiki/map
[reject]: https://github.com/nodef/extra-array/wiki/reject
[reduce]: https://github.com/nodef/extra-array/wiki/reduce
[accumulate]: https://github.com/nodef/extra-array/wiki/accumulate