2010/7/20 Vitaliy Yanchuk <fuksito / gmail.com>:
> Jean-Julien Fleck, thanks.
> Maybe have an idea of a one-line version? :)

Well: quite the same using inject:

arr.inject(Hash.new(0)) {|h,e| h[e]+= 1; h}

It all depends on what you call 'one-line' :o)

Cheers,

-- 
JJ Fleck
PCSI1 Lyc˝Ă Kl˝├er