url parsing on coffeescript

gistfile1.coffee

parseUrl = ( url = location.href ) ->
    params = {}
    ( ( parts = part.split( "=" ) ) && params[ parts[0] ] = parts[1] for part in ( url.split "?" ).pop().split "&" if url.indexOf( "?" ) != -1 ) && params || {}

$ ->
    console.log parseUrl( "http://test.com/?a=b" )
    console.log parseUrl( "http://test.com" )
    console.log parseUrl()