@extra-array/index-of/README.md

Finds first index of a value.

Finds first index of a value.
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> Alternatives: [indexOf], [lastIndexOf].<br>
> Similar: [search], [indexOf], [isValue], [includes].

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

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

<br>

```javascript
array.indexOf(x, v, [i]);
// x: an array
// v: search value
// i: start index (0)
```

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

var x = [1, 2, 3, 2, 5];
array.indexOf(x, 2);
// 1        ^

var x = [1, 2, 3, 2, 5];
array.indexOf(x, 2, 2);
// 3              ^
```

<br>
<br>


## References

- [List-Extra.elemIndex: elm](https://package.elm-lang.org/packages/elm-community/list-extra/7.1.0/List-Extra#elemIndex)
- [Array.prototype.indexOf: MDN web docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf)
- [_.indexOf: lodash](https://lodash.com/docs/4.17.15#indexOf)
- [Array.indexOf: sugarjs](https://sugarjs.com/docs/#/ES5/Array/indexOf)

[indexOf]: https://github.com/nodef/extra-array/wiki/indexOf
[lastIndexOf]: https://github.com/nodef/extra-array/wiki/lastIndexOf
[search]: https://github.com/nodef/extra-array/wiki/search
[isValue]: https://github.com/nodef/extra-array/wiki/isValue
[includes]: https://github.com/nodef/extra-array/wiki/includes