Alternative command to grep -w option Post: 302959204

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Top Forums Shell Programming and Scripting Alternative command to grep -w option Post 302959204 by RudiC on Friday 30th of October 2015 05:13:01 AM

10-30-2015

Registered User

man grep:

Quote:

-w, --word-regexp
Select only those lines containing matches that form whole words. The test is that the matching substring must either be at the beginning of the line, or
preceded by a non-word constituent character. Similarly, it must be either at the end of the line or followed by a non-word constituent character. Word-
constituent characters are letters, digits, and the underscore.

So Corona688's proposal should be slightly modified like

Code:

echo "ABC,123" | awk '$0 ~ "(^|[^A-Za-z0-9_])"P"($|[^A-Za-z0-9_])"' P="ABC"
ABC,123

---------- Post updated at 10:13 ---------- Previous update was at 10:11 ----------

Does your grep understand extended regexes? Try

Code:

echo "ABC,123" | grep -E "(^|[^A-Za-z0-9_])ABC($|[^A-Za-z0-9_])"
ABC,123

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zgrep

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)