From: Xavier Noria <fxn@...>
Date: 2011-03-25T03:53:36+09:00
Subject: Re: shortcut for add unless nil ?

You could do something like this (untested):

    [a, b, c, d].compact.reduce(:+)

though whether it is more clear is debatable. I think it reads fine if you're fluent.

Sent from my iPhone

El 24/03/2011, a les 19:36, Iain Barnett <iainspeed@gmail.com> va escriure:
> Hi,
> 
> Is was wondering if there's a Ruby idiom for adding variables that should be arrays but that may be nil, for example:
> 
> [1] + (a || [ ]) + (b || [ ]) + (c || [ ])
> 
> but that's a bit ugly IMO. I've had a look, but didn't see anything. I know I could use a fold or something similar, but I was wondering if there was something in the realms of ||= (i.e. nice, idiomatic shortcut) for this kind of thing?
> 
> 
> Iain