From: Thomas Luedeke <tluedeke@...>
Date: 2004-03-06T03:15:08+09:00
Subject: Ruby translation for UNIX scripting command

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Quick (and slightly embarassing) newbie question for the Ruby experts. I'm trying to learn Ruby, and move away from antediluvian UNIX scripting.How do I make a sequence of pattern matching lines in a file, then extract a particular field from the line? For example, in UNIX talk if I were interested in finding all lines with a particular match pattern "test", and printing the fourth field, I'd do a grep plus awk command such as:grep "test" file_name | awk ' { print $4 } ' &gt;&gt; output_fileHowever, in my Ruby books, I don't see any discussion about the function equivalent of printing a field of the type "$4" (i.e. fourth field). I can get the lines out of the search file, but I'm not quite sure how to determine fields.Thanks.TPL


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