From: botp <botpena@...>
Date: 2012-06-22T16:36:00+09:00
Subject: Re: inject was Benchmark obsession?

On Fri, Jun 22, 2012 at 7:30 AM, Henry Maddocks <hmaddocks@me.com> wrote:
> I come across this quite often, especially in Rails apps.
>
> a = {:list => [1,2,3,4]}
> b = {:list => [9,8,7,6,5]}
>
> c = [a,b]
>
> c.inject([]) {|memo, run| memo + run[:list] }
>
> I always cringe when I see it but I haven't found an alternative that is as
> clear and concise.
> collect and flatten looks ugly. I'd love to be able to do...
>
> c.collect {|run| *run[:list]}

c.collect {|run| run[:list]} . flatten

or if there are only few elements,

a[:list] + b[:list]

kind regards -botp