From: "David A. Black" <dblack@...>
Date: 2008-12-18T10:25:54+09:00
Subject: Re: Your word frequency calculator?

Hi --

On Wed, 17 Dec 2008, C. Pohjanraito wrote:

> Hi! I am studying various texts and code.
>
> Word frequency calculator is one basic tool. I find it an interesting, 
> elementary problem to solve.
>
> I found this word frequency analyser by William James:
>
>  freq = Hash.new(0)
>  loop {
>    data = (STDIN.read(4095) or break) + (STDIN.gets || "")
>    for word in data.downcase!.tr!('^a-z',' ').split

That's a dangerous technique, because str.downcase! is nil if there's
no change to the string, and nil.tr! will blow up.


David

-- 
David A. Black / Ruby Power and Light, LLC
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