Object.type

typeOf-alt.coffee

# Execute function immediately
typeOf = do ->
  classToType = {}
  for name in 'Boolean Number String Function Array Date RegExp Undefined Null'.split ' '
    classToType["[object #{name}]"] = name.toLowerCase()

  # Return a function
  (obj) ->
    strType = Object::toString.call obj
    classToType[strType] or 'object'

typeOf.coffee

typeOf = (value) ->
  type = typeof value
  if type is 'object' or type is 'function'
    return 'null'  if value is null
    return 'array' if value instanceof Array

    type = switch value.constructor
      when String   then 'string'
      when Number   then 'number'
      when RegExp   then 'regexp'
      when Function then 'function'
      when Date     then 'date'
      else          type
  type