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Top Forums Shell Programming and Scripting Help me to understand some regular expresions usage Post 302173514 by cfajohnson on Thursday 6th of March 2008 11:52:10 PM
Old 03-07-2008
Quote:
Originally Posted by alex_5161
Can someone explain me how those
restatements are constructed
Code:
        suffix=${name#*.}
        prefix=${main%%+([0-9])}
        num=10#${num}

1. What is the logic to use a reg-expr in variable name
2. In first string - the '#' seems to mean 'everithing after next
mached', but the '.' in reg-exp is a one character, here it seems it
used litteraly. Why?

You don't use regular expressions in parameter expansion; you use
filename expansion (a.k.a. wildcard) patterns.

See:
POSIX shell parameter expansions
 

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