From: Mark Wilson <mwilson13@...>
Date: 2003-06-19T12:00:26+09:00
Subject: Re: [RCR] Array#push(empty array expanded) => no exception


On Tuesday, June 17, 2003, at 02:20 PM, Daniel Berger wrote:

> [snip]

> Already fixed in (later) versions of 1.8
>
> ruby -v -> ruby 1.8.0 (2003-06-14) [sparc-solaris2.9]
>
> irb(main):004:0> [].push(*[])
> => []
>
> Regards,
>
> Dan

In general I think this kind of behavior is good. I like a method to 
return the calling object if the method has no effect on the calling 
object, but might have an effect if the argument had a different value. 
For example, in the Set class,

set = Set.new([1,2])
set.delete(3)

returns set.

If you want to know whether the method did anything, you would do the 
following

set.delete?(3)

which returns nil.

Regards,

Mark