From: Robert Klemme <shortcutter@...>
Date: 2008-06-24T15:33:05+09:00
Subject: Re: Suggestion: Enumerable#all?/any? with argument

On 23.06.2008 23:12, Farrel Lifson wrote:
> I was thinking about Enumerable (one of Ruby's more powerful modules)
> and I was wondering whether the following proposal to extend
> Enumerable#all?/any? would have any merit. In a nutshell I think  any?
> and all?  should take one argument which is then applied to each item
> using the === operator. For example:
>  [ "one", 2, "three"].all?( String )
> would return false, while
>  [ 1, 100, 1000].any?( 50...150 )
> would return true.
> 
> In the case where both an argument and a block is supplied both the
> block and the argument would be applied to the item and the results of
> each operation would be combined with AND. For example:
>  ["one", "two", "six"].all? ( String ) { |item| item.length == 3 }
> would return true while
>   [ 1, 2, "3" ].any? ( String ) { |item| item.to_i > 4 }
> would return false.
> 
> Anyone else see any merit in this? The expression
>   [ "one", "two", "three" ].all? String
> just seems quite nice to me.

+1

	robert