From: Josh Cheek <josh.cheek@...>
Date: 2010-01-02T22:05:24+09:00
Subject: Re: can't understand for this each

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On Sat, Jan 2, 2010 at 6:20 AM, Ruby Newbee <rubynewbee@gmail.com> wrote:

> Hello,
>
> Please take a look at below.
> what's each{ .. } in the find_all method?
> I can't understand for it. thanks.
>
> class Hash
>  def find_all
>    new_hash = Hash.new
>    each { |k,v| new_hash[k] = v if yield(k, v) }
>    new_hash
>  end
> end
>
> squares = {0=>0, 1=>1, 2=>4, 3=>9}
> z=squares.find_all { |key, value| key > 1 }
> p z
>
>
An English translation might read "For each key value pair in the hash, add
it to the new hash if the block submitted returns true."

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