From: Kenichi Kamiya <kachick1@...>
Date: 2012-01-17T01:21:51+09:00
Subject: Re: uniq with count; better way?

I like this

a = [4,5,6,4,5,6,6,7]

# 1
p Hash[a.group_by{|n|n}.map{|k, v|[k, v.size]}]

# 2
p Hash.new(0).tap{|h|a.each{|n|h[n] += 1}}


2012/1/17 Ralph Shnelvar <ralphs@dos32.com>:
> a = [4,5,6,4,5,6,6,7]
>
> result = Hash.new(0)
> a.each { |x|  result[x] += 1 }
>
> p result
>
>
>
> The result I am getting
>   {4=>2, 5=>2, 6=>3, 7=>1}
> is what I want.
>
> Is there a better way; perhaps using uniq?
>
>