This is a very short script that allows you to use a function called "either" in Twine's <<set>>, <<print>> and <<if>> macros. Give it several string or number values, separated by commas, and it will pick one of them randomly to use in the macro.

window.either = function() { return arguments[~~(Math.random()*arguments.length)];}

This functions largely identically to the Game Maker choose() function. You can use it like this:

<> - Prints one of the strings, chosen randomly.

<> - Sets $value to one of the numbers.

<> - This is true 50% of the time. Equivalent to <>

It's functionally similar to the <<rnd>> macro, but can be used inside <<set>> as well as <<print>>.

_{Feel free to report any bugs to @webbedspace.}