AngularJS filter for displaying acronyms.

acronym.coffee

## Examples
#
# "Turn Around Low" | acronym   -> "TAL"
# "turn_around.low" | acronym   -> "TAL"
# "list_price" | acronym        -> "LP"
# "name" | acronym              -> "N"
# "name" | acronym:2            -> "NA"


module.filter 'acronym', ->
  first = (word) -> word?[0] or ''
  
  (input, min_length = 2) ->
    words = input.split /[^A-Za-z]+/

    if words.length is 1
      words = words[0].slice(0, min_length).split('')

    return words.map(first).join('').toUpperCase()
    
    
    ## or use underscore.js
    # return words.map(_.first).join('').toUpperCase()

Doesn't work on me, could you provide a JS version of it ?