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Top Forums Shell Programming and Scripting Assembling the Pieces of a Regular Expression Post 302680225 by Michael_K on Wednesday 1st of August 2012 01:05:27 PM
Old 08-01-2012
balajesuri,

Thank you for your assistance. The code you supplied...
Code:
 
grep -i -E "([0-2][0-9]|3[01])-(JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)-[0-9][0-9]"

...worked perfectly for me!

I guess my problem was a syntax error; I notice you did not enclose the "-" within brackets.

Thank you for pointing out the potential for illogical dates such as 31-FEB. I know my code isn't 100% fool-proof, but I'm writing my script for (reasonably) experienced users, so hopefully I don't have to code against something that foolish. Smilie

I like your suggestion to use the date -d. It appears I don't have GNU date available to me, though. That would have been a beautiful solution to the problem, however!

Thank you very much for your assistance! I really appreciate it!
 

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ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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