From: Dan Fitzpatrick <dan@...>
Date: 2005-02-22T21:56:16+09:00
Subject: Re: Proposal for nil, 0, and "" in an if statement

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Bertram Scharpf wrote:

>Hi,
>
>Am Dienstag, 22. Feb 2005, 20:49:51 +0900 schrieb Dan Fitzpatrick:
>  
>
>>The following was derived from a portion of the destrutive! operations 
>>thread.
>>
>>Here is a proposal for evaluating "", 0, and nil in an if statement:
>>
>>Add empty? to NilClass and Fixnum
>>
>>nil.empty? => true
>>0.empty?   => true
>>
>>These already exist:
>>"".empty?  => true
>>[].empty?  => true
>>{}.empty?  => true
>>    
>>
>
>Maybe even "true.empty? #=> true", "false.empty? #=> false"?
>
>A good chance to end the discussions started over and over
>about strings and numbers in `if' clauses, I think.
>
>Bertram
>
>
>  
>
I would reverse the true and false:

true.empty?  => false
false.empty? => true

These are not quite as intuitive as NilClass and Fixnum but I agree they would be nice to have as well.

Dan




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