Extending native JavaScript objects is a bad practice #47
Description
I noticed in a few spots that JavaScript's native Array and String objects are being extended by Liquid with clear, first, last, etc.
With Liquid on our site, we ran into some pretty nasty bugs due to this and had to roll code back. Is there a reason this needs to be done as a property rather than creating helpers for this functionality? I'd be happy to provide a pull request to change this bit of code.