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05-11-2009

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what is it called?

Hey,

I've come across and have used things like:
fase1=${QUERY_STRING%%&*}
and I was wondering what this kind of actions is called? (I'm talking about the % and # operators on strings) Does anyone know where i can find more info about it? It looks like a very powerful tool...

Regards,
Karel

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in your 'man ksh' search for 'Parameter expansion':

Code:

     ${parameter%word}
           Remove Smallest  Suffix  Pattern.  The  word  will  be
           expanded to produce a pattern. The parameter expansion
           then will result in parameter, with the smallest  por-
           tion of the suffix matched by the pattern deleted.

     ${parameter%%word}
           Remove  Largest  Suffix  Pattern.  The  word  will  be
           expanded to produce a pattern. The parameter expansion
           then will result in parameter, with the  largest  por-
           tion of the suffix matched by the pattern deleted.

     ${parameter#word}
           Remove Smallest  Prefix  Pattern.  The  word  will  be
           expanded to produce a pattern. The parameter expansion
           then will result in parameter, with the smallest  por-
           tion of the prefix matched by the pattern deleted.

     ${parameter##word}
           Remove  Largest  Prefix  Pattern.  The  word  will  be
           expanded to produce a pattern. The parameter expansion
           then will result in parameter, with the  largest  por-
           tion of the prefix matched by the pattern deleted.

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