From: Emmanuel Touzery <emmanuel.touzery@...>
Date: 2003-05-26T17:51:07+09:00
Subject: Re: exiting of a block


"Robert Klemme" <bob.news@gmx.net> wrote in message
news:bashj0$33hl9$3@ID-52924.news.dfncis.de...

> > # now find the current program for this
> > # channel.
> > programsForChannel.find { |program|
> > result = false
> > if program.time <= showTime
> > if program.endTime
> > # there is a endtime.
> > # are we now before this end?
> > if program.endTime > showTime
> > result = true
> > end
> > else
> > # program has no registered
> > # end.
> >   result = true
> > end
> > end
> > result
> > }
> >
> > any help appreciated!
>
> In your case you can use "return" even with older versions of ruby if you
> use a method:
>
> def find
>   [1, 2, 3].find { |e|
>     return true if e == 2
>   }
>
>   false
> end
>
> Are you aware of the standard methods Enumerable#include?,
> Enumerable#find, Enumerable#detect, Enumerable#select, Enumerable#find_all
> and Enumerable#grep?  These should provide the functionality you need.

the code you give returns returns true or false, i want the item that is
found; try it.
for the code you gave, i would expect a result of 2. but you get true :O(

i actually want to use Enumerable#find, as I do, but with a complex
condition. the problem is that in my condition i have several places to say
"yes, this is the item i want" or "no, it's not the item i want". in a
function i would use return, but in that case, that pops me out of the whole
function, not only of the block.

actually i want exactly what matz suggested, that's only available in 1.8:
break <return value for the block>.
i'll clean up this code when upgrading to 1.8 :O)

> Regards
>
>     robert

thanks for the suggestion,

emmanuel