In javascript how can we identify whether an object is a Hash or an Array?

Question

The output of my JSON call can either be an Array or a Hash. How do I distinguish between these two?

Answer 1

For parsing json could come in handy :)

isArrayHashs = (attr) ->
  !!attr && attr.constructor == Array && isHash(attr[0])

isHash = (attr) ->
  !!attr && !$.isNumeric(attr) && attr.constructor == Object

attr[0].constructor must be:

• String
• Numeric
• Array
• Object
• Undefined