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Full Discussion: extracting information from lines, put them into arrays
Top Forums Programming extracting information from lines, put them into arrays Post 302476231 by jsmithstl on Wednesday 1st of December 2010 06:36:04 AM
Old 12-01-2010
Here's one way:

Code:
 
$ cat avg.pl
#!/usr/bin/perl
use strict;
my $line;
my $val;
my $school;
my $grades;
my $score;
my $total;
my $avg;
my $i;
open ( INFILE, "<avg.dat" ) or
   die "ERROR:  Unable to open file:  avg.dat" ;
while ($line = <INFILE>) {
   chomp $line;
   ($school,$grades) = split(' ', $line, 2);
   $i = 0;
   $total = 0;
   foreach $score (split(',', $grades)) {
      $i++;
      $total += $score;
   }
   $avg = $total/$i;
   printf "%s:  %.1f\n", $school, $avg;
}
close (INFILE);
exit;

Code:
 
$ cat avg.dat
Highschool 100, 123, 135
Middleschool 41, 67, 54
Elementary 76, 315, 384

$ ./avg.pl
Highschool:  119.3
Middleschool:  54.0
Elementary:  258.3

 

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LEARN ABOUT REDHAT

gzexe

GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME

       gzexe - compress executable files in place

SYNOPSIS

       gzexe [ name ...  ]

DESCRIPTION

       The  gzexe  utility  allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a
       penalty in performance).  For example if you execute ``gzexe /bin/cat'' it will create the following two files:
	   -r-xr-xr-x  1 root  bin   9644 Feb 11 11:16 /bin/cat
	   -r-xr-xr-x  1 bin   bin  24576 Nov 23 13:21 /bin/cat~
       /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file.  You can remove /bin/cat~ once  you  are	sure  that
       /bin/cat works properly.

       This utility is most useful on systems with very small disks.

OPTIONS

       -d     Decompress the given executables instead of compressing them.

SEE ALSO

       gzip(1), znew(1), zmore(1), zcmp(1), zforce(1)

CAVEATS

       The  compressed	executable  is a shell script. This may create some security holes. In particular, the compressed executable relies on the
       PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep).

BUGS

       gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually  in  some  cases,
       using chmod or chown.

																	  GZEXE(1)
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