Reusable mixins

gistfile1.coffee

do (root = @) ->
  root.mixinList = {}

  root.mixin = (target, name, params...) ->
    root.mixin(target, n, params) for n in name if Array.isArray name

    if typeof mixinList[name] is 'function'
      mixinList[name].apply(target, params)
    else
      target[key] = value for key, value of mixinList[name] when not Object.hasOwnProperty.call target, key

    null

  root.mixin.define = (name, definition) ->
    return unless name? or definition?
    return if mixinList[name]?

    mixinList[name] = definition

    null
    
  root.mixin.remove = (name) ->
    delete mixinList[name] if name? and mixinList[name]?

    null

  root.mixin.exists = (name) -> Object.hasOwnProperty.call mixinList, name