From: Sebastian Hungerecker <sepp2k@...>
Date: 2008-12-18T18:35:39+09:00
Subject: Re: Array problem

John Zoldiark wrote:
> I have an array like this:
> array = [ "manyThings.mp3", "myLike.gif", "moreCoco.bmp",
> "theFormat.bmp"]
>
> and I want to make some comparison to eliminate all the words in the
> array that are NOT of the bmp format.  So at the end the array will look
> like this:
>
> array = ["moreCoco.bmp", "theFormat.bmp"]

Instead of a reject/select you can also use grep when working with regexen:
array.grep(/\.bmp$/)
Instead of using a regex you could also use File.extname here:
array.select {|x| File.extname(x)==".bmp"}
Of course all these only tell you that the filenames end with .bmp, not in 
which format the files actually are.

HTH,
Sebastian
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