Grep with wildcard in middle of word


 
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# 1  
Old 01-28-2009
Grep with wildcard in middle of word

How can

grep G.*schema

give me the result: ${Gacntg_dt}""'"'


doesn't G.*schema say give me an unlimited number of characters between G and schema?

Smilie

# 2  
Old 01-28-2009
Quote:
Originally Posted by danmauer
How can
grep G.*schema

give me the result: ${Gacntg_dt}""'"'
doesn't G.*schema say give me an unlimited number of characters between G and schema?

Grep uses regular expressions, not wildcards.

In a regular expression, * stands for 0 or more of the preceding character; a dot is matched by any character.
# 3  
Old 01-29-2009
correct, that what i understood..

so shouldn't G.*schema mean 0 or more of any character between G and schema?

so for ${Gacntg_dt}""'"' i get the 0 or more characters after G but the string schema doesn't get considered as part of the match.

sorry, but i must be missing something...
# 4  
Old 01-29-2009
Quote:
Originally Posted by danmauer
correct, that what i understood..

so shouldn't G.*schema mean 0 or more of any character between G and schema?

Please use [code] tags for code, not [color].
Quote:
so for ${Gacntg_dt}""'"' i get the 0 or more characters after G but the string schema doesn't get considered as part of the match.

sorry, but i must be missing something...

Please post the exact code you are using as well as a sample input file.

Note that a search string containing wildcard cahracters should be quoted.
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