Sponsored Content
Top Forums Shell Programming and Scripting ksh, difference between double bracket and single bracket Post 302584147 by methyl on Thursday 22nd of December 2011 09:34:54 AM
Old 12-22-2011
[[ ]] is a Conditional Expression. Explained in the manual for your Shell in the "Conditional Expressions" section.
[ ] is a Test. Explained partially in the manual for your Shell in the "test" section then further in the manual for the "test" command.

Though there is much overlap in the syntax for basic conditions and tests, there are also major differences in the syntax for "and" and "or" etc. .
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Extract string in square bracket

Hi Input text is some message some message some message Expected output is main value1 value2 value3 Any idea how to above values in square brackets using shell scripting? many thanks. (3 Replies)
Discussion started by: hnh
3 Replies

2. Shell Programming and Scripting

Best practice for bracket comparisons?

So, I have no formal higher education in programming at all and am self taught. I am now wondering what would be considered best practices? Like should I hard code a variable, then compare it to what I want to know or achieve, or should I just put the commands with in the brackets? Example, a... (5 Replies)
Discussion started by: tlarkin
5 Replies

3. Shell Programming and Scripting

Split a string with bracket

Hi, Am trying to split a string with bracket in ksh but it is not splitting it correctly. split("Hello, Name(1), Name(2)", main,","); How do i split correctly? (3 Replies)
Discussion started by: nightrider
3 Replies

4. Shell Programming and Scripting

extract word from bracket - shell

Related to : thread : 34769-removing-duplicate-lines-file.html i want to extract the words in () eg: string1="bla bla (aaa) aha hai (aa)" after processing output i need is : aaa aa (2 Replies)
Discussion started by: linuxadmin
2 Replies

5. Shell Programming and Scripting

Double bracket giving error

here is a small script I wrote: #! /bin/bash if ] then echo "argument is null" fi It is giving error: test.sh: any idea, why is it so? (2 Replies)
Discussion started by: vina201unx2011
2 Replies

6. Shell Programming and Scripting

Remove bracket part

Hi I have to remove in a file in first column whatever is written in brackets with brackets so one file hgfd 123 gfhdj 483 jdgfdg 34738 the output shuld be hgfd 123 gfhdj 483 jdgfdg 34738 (9 Replies)
Discussion started by: manigrover
9 Replies

7. Shell Programming and Scripting

variable inside if bracket

Is this possible? The below code not working for me. dir=mydir if ; then echo "found /home/$mydir " else echo "Not found /home/$mydir" fi ---------- Post updated at 05:28 AM ---------- Previous update was at 05:25 AM ---------- Its working for me now (1 Reply)
Discussion started by: anil510
1 Replies

8. Shell Programming and Scripting

Vim : Match all bracket { and fold them (zf%)

Hello ! I'm using a lot the command zf% with the cursor on the first bracket of a function for example, to fold it. Ex : I put my cursor on the first bracket myfunction(){ # body } I type zf% It become : +-- 9 lines : myfunction()... (2 Replies)
Discussion started by: Purgator
2 Replies

9. Shell Programming and Scripting

How to remove contents from file which are under bracket?

hello Friend, In hostgroup file, i have define lots of hostgroups. I need to remove few of them without manually editing file. Need script or syntax. I want to search particular on hostgroup_members and delete hostgoup defination of it. for example. define hostgroup{ hostgroup_name... (8 Replies)
Discussion started by: ghpradeep
8 Replies

10. UNIX for Beginners Questions & Answers

Error in ksh script: missing right bracket

I have no idea how to write ksh script, but i'm really in need of help with this. I using fedora 30 and in attempt of runnig attached script i getting those errors, i solved first error by removing excess bracket, but i do not know what should i do with other. Pls sorry for trash post. (8 Replies)
Discussion started by: NullPtr
8 Replies
Test::Requires(3)					User Contributed Perl Documentation					 Test::Requires(3)

NAME
Test::Requires - Checks to see if the module can be loaded SYNOPSIS
# in your Makefile.PL use inc::Module::Install; test_requires 'Test::Requires'; # in your test use Test::More tests => 10; use Test::Requires { 'HTTP::MobileAttribute' => 0.01, # skip all if HTTP::MobileAttribute doesn't installed }; isa_ok HTTP::MobileAttribute->new, 'HTTP::MobileAttribute::NonMobile'; # or use Test::More tests => 10; use Test::Requires qw( HTTP::MobileAttribute ); isa_ok HTTP::MobileAttribute->new, 'HTTP::MobileAttribute::NonMobile'; # or use Test::More tests => 10; use Test::Requires; test_requires 'Some::Optional::Test::Required::Modules'; isa_ok HTTP::MobileAttribute->new, 'HTTP::MobileAttribute::NonMobile'; DESCRIPTION
Test::Requires checks to see if the module can be loaded. If this fails rather than failing tests this skips all tests. AUTHOR
Tokuhiro Matsuno <tokuhirom @*(#RJKLFHFSDLJF gmail.com> THANKS TO
kazuho++ # some tricky stuff miyagawa++ # original code from t/TestPlagger.pm tomyhero++ # reported issue related older test::builder SEE ALSO
"TestPlagger.pm" in t LICENSE
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.16.2 2010-09-26 Test::Requires(3)
All times are GMT -4. The time now is 03:07 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy