LearnBoost/stylus — pull request #640 by phaseOne (2012-04-22 15:00:50+00:00)
Title: Added function `contains()`

`contains()` will search for a RegExp match inside of an expression.

Example:

```
testarray = 1 3 a11 9 p8

contains('[a]', testarray)
// => 2

contains('foo', testarray)
// => -1