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#1
09-10-2010
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Help with grep / regular expression
Hi, Input file: Code:
-13- -1er- -1xyz1- -1xz12- -2ab1- -2ab2-- -143- Code: Code:
grep '^[\-][0-9][a-z]*[0-9]\-' input.txt Wrong output: Code:
-13- -1xyz1- -2ab1- -2ab2-- Expected output: Code:
-1xyz1- -2ab1- This is what i am trying to do: 1)starts with - as first one 2) second character any number 3) third one any letter a to z 4) penultimate char - any number 5) last one is with - Thanks in advance . 
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#2
09-10-2010
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Hi. Your description could be considered slightly ambiguous, but: Code:
$ egrep '^-[0-9][a-z]+[0-9]-$' file1 -1xyz1- -2ab1- |
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dragon.1431 (09-10-2010) | ||
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#3
09-10-2010
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Hi Scottn,
just curious, is it not possible to do it with grep / awk ? |
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#4
09-10-2010
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He is using grep, ie. egrep is like grep -E.
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#5
09-10-2010
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And the awk is the same: Code:
$ awk '/^-[0-9][a-z]+[0-9]-$/' file1 -1xyz1- -2ab1- |
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