From: Christopher Dicely <cmdicely@...>
Date: 2008-02-10T07:20:07+09:00
Subject: Re: Identifying

On Feb 9, 2008 2:00 PM, Adam Akhtar <adamtemporary@gmail.com> wrote:
> If you have an array which contains a mixture of say intergers and
> nested arrays, how can you determine whether an element is an array or
> not
>
> ie in psedo code
>
> array.each do |x|
>    if x == Array
>      do something
> end
>
> whats the corect way to write the if statement?


Depending on exactly what you want there are two main ways (with
several different ways of expressing the most common):

if x.instance_of? Array ... # tests if x is an Array (strictly)
if x.kind_of? Array ... # test if x is an instance of Array or one of
its descendants
if x.is_a? Array ... # same as kind_of?
if Array === x ... # same as kind_of?, useful to know exists because
it lets you match against classes in case statements