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Full Discussion: Help to fetch first two characters from a word in perl
Top Forums Shell Programming and Scripting Help to fetch first two characters from a word in perl Post 302423467 by girish.raos on Friday 21st of May 2010 05:46:24 AM
Old 05-21-2010
Quote:
Originally Posted by pludi
Depends on how you want to proceed with that information. To just print the line if a word matches your requirements:
Code:
perl -ne 'print if /\bDE_[\w_]+?/;' input.txt

If you want just the remainder of the word:
Code:
perl -ne 'print $1 if /\bDE_([\w_]+?)/' input.txt


Thanks a lot Pludi, it was very useful for me.

---------- Post updated at 04:46 AM ---------- Previous update was at 04:45 AM ----------
Quote:
Originally Posted by Yogesh Sawant
check if this is what you are looking for:
Code:
$word = "DE_PR_Package__Basic";
if ($word=~ m/^DE/) {
    print "matches\n";
}
else {
    print "does not match\n";
}

in the regex, ^ is the start of string. You might want to add _ after DE so that the regex is ^DE_
Thanks a lot Yogesh, It was very useful for me.
 

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LEARN ABOUT CENTOS

wc

WC(1)								   User Commands							     WC(1)

NAME

       wc - print newline, word, and byte counts for each file

SYNOPSIS

       wc [OPTION]... [FILE]...
       wc [OPTION]... --files0-from=F

DESCRIPTION

       Print  newline, word, and byte counts for each FILE, and a total line if more than one FILE is specified.  With no FILE, or when FILE is -,
       read standard input.  A word is a non-zero-length sequence of characters delimited by white space.  The options below may be used to select
       which counts are printed, always in the following order: newline, word, character, byte, maximum line length.

       -c, --bytes
	      print the byte counts

       -m, --chars
	      print the character counts

       -l, --lines
	      print the newline counts

       --files0-from=F
	      read input from the files specified by NUL-terminated names in file F; If F is - then read names from standard input

       -L, --max-line-length
	      print the length of the longest line

       -w, --words
	      print the word counts

       --help display this help and exit

       --version
	      output version information and exit

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report wc translation bugs to <http://translationproject.org/team/>

AUTHOR

       Written by Paul Rubin and David MacKenzie.

COPYRIGHT

       Copyright (C) 2013 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for wc is maintained as a Texinfo manual.  If the info and wc programs are properly installed at your site, the com-
       mand

	      info coreutils 'wc invocation'

       should give you access to the complete manual.

GNU coreutils 8.22						     June 2014								     WC(1)
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