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Full Discussion: [Need help] perl script to find the occurance of string from a text file
Top Forums Shell Programming and Scripting [Need help] perl script to find the occurance of string from a text file Post 302932845 by derekludwig on Sunday 25th of January 2015 04:29:21 PM
Old 01-25-2015
This script takes as its first argument the keyword list, and the second and subsequent arguments as the files to parse.
Code:
use strict;
use warnings;
use File::Basename;

$, = '';
$\ = "\n";

my $NAME   = basename $0;
my %COUNTS = ();

#-------------------------------------------------------------------------------
# Read in keyword list

my $keywordlistfile = shift @ARGV;
die $0, ': missing keywordlist' unless defined $keywordlistfile;

open KH, '<', $keywordlistfile or die $keywordlistfile;

while (<KH>) {
    chomp;
    $COUNTS{$_} = 0;
}

close KH;

#-------------------------------------------------------------------------------

while (<>) {
    my ($op) = m{^\s+(?:0x[0-9a-f]+ +)+(\S+)}i;
    next unless defined $op;
    $COUNTS{$op}++ if defined $COUNTS{$op};
}

#-------------------------------------------------------------------------------

while (my ($op, $n) = each %COUNTS) {
    printf "\%10d \%s\n", $n, $op;
}

USAGE:
Code:
parser keywordfile inputfile...

Given your example, the results would be:
Code:
        0 SUB
         0 ADD
         1 BRA.l
         1 MOV
         2 RETI

 

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LEARN ABOUT DEBIAN

gethead

gethead(1)						      General Commands Manual							gethead(1)

Name
       gethead - Print FITS or IRAF header keyword values

Synopsis
       gethead [-hptv] [-d pathname] [-n num] <FITS or IRAF file> kw1 kw2 ... kwn

Description
       Print  values of the specified keywords from the given image header.  By default they are all listed on one line, separated by spaces.  The
       -v flag causes the keyword names and values to be printed, one keyword per line.  To read keywords from a list of files, substitute @<list-
       file>  for  the file names on the command line.	To read a lot of keywords, put them, one per line, in a file and substitute @<keylistfile>
       on the command line.  If two @ commands are present, the program will figure out which contains file names and which contains keywords.

Options
       -a     List file name even if keywords are not found

       -d     Root directory for input files (default is cwd)

       -e     Output keyword=value's on one line per file

       -f     Never print filenames (default is to print them if more than one)

       -g     Output keyword=value's on one line per keyword

       -h     flag causes the keyword names to be printed at top of columns.

       -n     Number of decimal places in numeric output

       -o     OR conditions instead of ANDing them

       -p     Print full pathnames of files

       -t     flag causes the output to be in tab-separated tables with keyword column headings.

       -u     Always print ___ if keyword not found, event if only one keyword in search

       -v     Print output as <keyword>=<value>, one per line

Web Page
       http://tdc-www.harvard.edu/software/wcstools/gethead.html

Author
       Doug Mink, SAO (dmink@cfa.harvard.edu)

6 July 2001							     WCSTools								gethead(1)
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