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Full Discussion: Doubt in integer comparison
Top Forums Shell Programming and Scripting Doubt in integer comparison Post 302580008 by methyl on Wednesday 7th of December 2011 07:26:59 AM
Old 12-07-2011
The [[ ]] syntax is a Conditional Expression and is described in the "Conditonal Expressions" section of your Shell Manual.

The [ ] syntax is a Test and is described in the "test" Shell command which is usually a superset of the unix "test" command.

Though there is much overlap in the syntax, the two forms are not interchangeable.

Code:
Beware of this classic mistake:
a=1
b=2
if [ $a > $b ]
then
        echo ok
else
        echo not ok
fi

Replies "ok" and CREATES A FILE CALLED "2" !

 

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LEARN ABOUT DEBIAN

cpanplus::shell::default::plugins::source

CPANPLUS::Shell::Default::Plugins::Source(3perl)	 Perl Programmers Reference Guide	  CPANPLUS::Shell::Default::Plugins::Source(3perl)

NAME

       CPANPLUS::Shell::Default::Plugins::Source  - read in CPANPLUS commands

SYNOPSIS

	   CPAN Terminal> /source /tmp/list_of_commands /tmp/more_commands

DESCRIPTION

       This is a "CPANPLUS::Shell::Default" plugin that works just like your unix shells source(1) command; it reads in a file that has commands
       in it to execute, and then executes them.

       A sample file might look like this:

	   # first, update all the source files
	   x --update_source

	   # find all of my modules that are on the CPAN
	   # test them, and store the error log
	   a ^KANE$'
	   t *
	   p /home/kane/cpan-autotest/log

	   # and inform us we're good to go
	   ! print "Autotest complete, log stored; please enter your commands!"

       Note how empty lines, and lines starting with a '#' are being skipped in the execution.

BUG REPORTS

       Please report bugs or other issues to <bug-cpanplus@rt.cpan.org<gt>.

AUTHOR

       This module by Jos Boumans <kane@cpan.org>.

COPYRIGHT

       The CPAN++ interface (of which this module is a part of) is copyright (c) 2001 - 2007, Jos Boumans <kane@cpan.org>. All rights reserved.

       This library is free software; you may redistribute and/or modify it under the same terms as Perl itself.

SEE ALSO

       CPANPLUS::Shell::Default, CPANPLUS::Shell, cpanp

perl v5.14.2							    2014-09-29			  CPANPLUS::Shell::Default::Plugins::Source(3perl)
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