My First CoffeeScript

utilities.js.coffee

String.prototype.capitalize = ->
  return @charAt(0).toUpperCase() + @slice(1)

window.remove_fields = (link) -> 
  ($ link).prev("input[type='hidden']").val 1
  ($ link).parent.hide

window.add_fields = (link, association, content) ->
  new_id = new Date().getTime
  regexp = new RegExp("new_" + association, "g")
  ($ link).parent.after content.replace(regexp, new_id) 

window.clearForm = (form) ->
  ($ ':input', form).each ->
    type = @type
    tag = @tagName.toLowerCase()
    if (type=="hidden" || type == 'text' || type == 'password' || tag == 'textarea')
      @value = ""
    else if (type == 'checkbox' || type == 'radio')
      @checked = false
    else if (tag == 'select')
      @selectedIndex = -1

jQuery ->
  $("form")
    .bind "ajax:error", (event, xhr, status) ->
      errors = JSON.parse xhr.responseText
      ($ "#error_explanation").remove
      errors_container = ($ "<div>").attr "id","error_explanation" 
      list = ($ "<ul>")
      number_of_errors = 0
      $.each errors, (k, v) ->
        number_of_errors++
        list.append $("<li>").html(k.capitalize() + " " + v)

      errors_container
        .append($("<h2>").html(number_of_errors + " errors prohibited this resource from being saved"))
        .append list
      ($ @).prepend errors_container

  if ($ "#map").size()
    google.load "maps", "3", {other_params:'sensor=false', callback: -> initialize_map("#map")}