On Mon, Jan 16, 2012 at 16:00, Sigurd <cu9ypd / gmail.com> wrote:

> [4,5,6,4,5,6,6,7].inject(Hash.new(0)) {|res, x| res[x] += 1; res }
>

I think this is a misuse of inject, personally, every time I see it. It's
harder to read and it doesn't give the feeling of actually "reducing"
(inject's alias) the array down to one thing. The required `; res` is a
sign of that. Compare:

[1, 2, 3, 4].inject(5) { |a, b| a + b }