I need to find in a file a list of number where last two digit end in a range Post: 303042328

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Top Forums UNIX for Beginners Questions & Answers I need to find in a file a list of number where last two digit end in a range Post 303042328 by drl on Saturday 21st of December 2019 05:55:27 PM

12-21-2019

Registered User

Hi.

All in a single perl code: extraction of rightmost 2 digits, omit any containing lines greater than 33, numerically sort left-over lines based on right-most 2 characters:

Code:

#!/usr/bin/env perl

# @(#) p1       Demonstrate filtering, collecting, ordering.

use strict;
use warnings;

my (@a);
while (<>) {    # Eliminate numbers ending in > 33, collect rest
  chomp;
  next if substr( $_, -2, 2 ) > 33;
  push( @a, $_ );
}

# Sort numerically by right-most 2 digits
print join( "\n", sort { substr( $a, -2, 2 ) <=> substr( $b, -2, 2 ) } @a ),
  "\n";

exit(0);

producing:

Code:

343201134806
353201918107
323202132208
32201583126

On system like:

Code:

OS, ker|rel, machine: Linux, 3.16.0-7-amd64, x86_64
Distribution        : Debian 8.11 (jessie) 
perl 5.20.2

Best wishes ... cheers, drl

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LEARN ABOUT BSD

lorder

LORDER(1)						      General Commands Manual							 LORDER(1)

NAME

       lorder - find ordering relation for an object library

SYNOPSIS

       lorder file ...

DESCRIPTION

       The input is one or more object or library archive (see ar(1)) files.  The standard output is a list of pairs of object file names, meaning
       that the first file of the pair refers to external identifiers defined in the second.  The output may be processed by tsort(1) to  find	an
       ordering of a library suitable for one-pass access by ld(1).

       This brash one-liner intends to build a new library from existing `.o' files.

	      ar cr library `lorder *.o | tsort`

       The need for lorder may be vitiated by use of ranlib(1), which converts an ordered archive into a randomly accessed library.

FILES

       *symref, *symdef
       nm(1), sed(1), sort(1), join(1)

SEE ALSO

       tsort(1), ld(1), ar(1), ranlib(1)

BUGS

       The names of object files, in and out of libraries, must end with `.o'; nonsense results otherwise.

4th Berkeley Distribution					  April 29, 1985							 LORDER(1)

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