Add CoffeeScript friendly argument order to Underscore.js

underscoreR.coffee

# Five lines of code that will make your underscore + CoffeeScript use cleaner.
# Creates an underscore function for each function in to_reverse with R (short for Reversed) appended to the name.
# The R version moves the function argument (first argument in normal underscore) to the end, 
# so you can write:
$(window).scroll _.throttleR 500, ->
    console.log "This print's at most every 500ms"

# Instead of:
$(window).scroll _.throttle ->
        console.log "This prints at most every 500ms too"
    ,
    500

# The code (Add immediately after you include underscore.js):
to_reverse = ['bind', 'delay', 'defer', 'throttle', 'debounce']
mixin = {}
for name in to_reverse then do (name) ->
    mixin["#{name}R"] = (args..., f) -> _(f)[name](args...)
_.mixin mixin

facepalm Yep, this also works, but needs the ugly leading comma. Slightly better than the ending comma?

The leading comma seems to be idiomatic from my limited exposure to coffeescript and seeing setInterval() in the wild. :o)

You get used to it pretty quickly.