Picks an arbitrary infix.
[:package:](https://www.npmjs.com/package/@extra-array/infix)
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> Similar: [infix], [infixes], [hasInfix], [searchInfix].

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

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

<br>

```javascript
array.infix(x, [n], [r]);
// x: an array
// n: number of values (-1 => any)
// r: random seed 0->1
```

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

var x = [1, 2, 3];
array.infix(x);
// [ 1, 2 ]

array.infix(x, 1);
// [ 2 ]

array.infix(x, 1, 0.5);
// [ 2 ]
```

[infix]: https://github.com/nodef/extra-array/wiki/infix
[infixes]: https://github.com/nodef/extra-array/wiki/infixes
[hasInfix]: https://github.com/nodef/extra-array/wiki/hasInfix
[searchInfix]: https://github.com/nodef/extra-array/wiki/searchInfix