From: dblack@...
Date: 2006-09-25T01:28:43+09:00
Subject: Re: Use of array shift and blocks

Hi --

On Mon, 25 Sep 2006, Toby Rodwell wrote:

> (Something a bit more basic than the other thread about the array shfit
> bug!)
>
> Given the following:
>
> myArray=["a", "b", "c", "d"]
> until myArray.empty?
> 	myArray.shift { |letter|
> 		puts letter
> 	}
> end
>
> ... I would expect the letters a, b, c and d to be printed to the
> screen, but I don't get anything (including no error message).  Have I
> misunderstood something about array shift and/or blocks?

shift doesn't take a block.  You can write one but shift won't call
it.

You could do this:

   until array.empty?
     puts array.shift
   end


David

-- 
                   David A. Black | dblack@wobblini.net
Author of "Ruby for Rails"   [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog)        [2] | Co-director, Ruby Central, Inc.   [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com    | [4] http://www.rubycentral.org