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Full Discussion: Script to output custom characters in different order
Top Forums Shell Programming and Scripting Script to output custom characters in different order Post 302593880 by drl on Sunday 29th of January 2012 07:56:14 PM
Old 01-29-2012
Hi.

Here's a perl script that uses a module for the hard parts:
Code:
#!/usr/bin/env perl

# @(#) p2	Demonstrate combinations and permutations.

use Math::Combinatorics;

my @n = qw(a b c);
print "combinations of 2 from: " . join( " ", @n ) . "\n";
print "------------------------" . ( "--" x scalar(@n) ) . "\n";
print join( "\n", map { join " ", @$_ } combine( 2, @n ) ), "\n";
print "\n";
print "permutations of 3 from: " . join( " ", @n ) . "\n";
print "------------------------" . ( "--" x scalar(@n) ) . "\n";
print join( "\n", map { join " ", @$_ } permute(@n) ), "\n";

exit(0);

producing:
Code:
% ./p2
combinations of 2 from: a b c
------------------------------
c a
c b
a b

permutations of 3 from: a b c
------------------------------
a b c
a c b
b a c
b c a
c a b
c b a

See perldoc Math::Combinatorics for details ... cheers, drl
 

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LEARN ABOUT DEBIAN

fence_tool

FENCE_TOOL(8)							      cluster							     FENCE_TOOL(8)

NAME

       fence_tool - a utility for the fenced daemon

SYNOPSIS

       fence_tool [COMMAND] [OPTIONS]

DESCRIPTION

       This utility controls and queries the fenced(8) daemon with the following commands:

       join   join the fence domain.

       leave  leave the fence domain.

       dump   print the fenced internal debug buffer ont stdout.

       ls     display internal fenced state.

       The leave command will not be sent to fenced if fence_tool detects that any instances of gfs or dlm are in use.

OPTIONS

       -n     Show all node information in ls.

       -t seconds
	      Retry cman connection for this many seconds.  0 none, -1 indefinite. Default 0.

       -q seconds
	      Delay join up to this many seconds for the cluster to have quorum.  0 none, -1 indefinite. Default 0.

       -m seconds
	      Delay join up to this many seconds for all nodes in cluster.conf to be cluster members.  0 none, -1 indefinite. Default 0.

       -w seconds
	      Wait up to this many seconds for the result of join or leave.  0 none, -1 indefinite. Default 0.

       -h     Print a help message describing available options, then exit.

       -V     Print program version information, then exit.

SEE ALSO

       fenced(8)

cluster 							    2009-12-21							     FENCE_TOOL(8)
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