@extra-array/length/README.md

Counts the number of values.

Counts the number of values.
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> Similar: [index], [indexRange], [size], [isEmpty].

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

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

<br>

```javascript
array.length(x, [i], [I]);
// x: an array
// i: start index (-ve: from right) (0)
// I: end index (-ve: from right) (X)
```

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

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

array.length(x, 1);
// 3

array.length(x, 1, 3);
// 2
```

<br>
<br>


## References

- [Array.prototype.slice: MDN web docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice)
- [Array.length: MDN web docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/length)

[index]: https://github.com/nodef/extra-array/wiki/index
[indexRange]: https://github.com/nodef/extra-array/wiki/indexRange
[size]: https://github.com/nodef/extra-array/wiki/size
[isEmpty]: https://github.com/nodef/extra-array/wiki/isEmpty