From: Robert Dober <robert.dober@...>
Date: 2007-04-13T17:57:47+09:00
Subject: Re: Idiom wanted (now hiring!)

On 4/13/07, Joel VanderWerf <vjoel@path.berkeley.edu> wrote:
> Jonathan wrote:
> > Is there a cool way to do this without calling the function twice?:
> >
> > a = func(b) unless func(b).nil? (AKA)
these two are not equivalent, just imagine func(b) returning false
> > a = func(b) if func(b)

>
> a = func(b) || a
and if a did not exist before?
Well it still works, as I expected given the poster of the message, but I really
feel this is not consistent behavior

@a = f(b) || @a
of course that nicely corresponds to the auto nilification of
undefined instance vars, like it or hate it.

But for local variables?

Cheers
Robert
>
> --
>        vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407
>
>


-- 
You see things; and you say Why?
But I dream things that never were; and I say Why not?
-- George Bernard Shaw