Hi all, I'm confused about the proper syntax for multi-conditional if then statements. I'm trying to set limitations on info input on the command line.. i.e.
if ] ;then
$x=$vr1
else
print "You have entered an invalid option."
Can someone please clue me in on what is wrong with my syntax;... (3 Replies)
Hello,
I am having trouble with the syntax with a conditional statement in a BASH script involving multiple conditions. Any suggestions would be greatly appreciated!
if ; then
array=("${array}" "$dnNum" )
fi
i receive this error:
./testscript: ' (4 Replies)
Guys, Im trying to have a script that evaluates multiple conditions :
test.sh:
if
then
echo "host $1"
else
if
then
echo "host $1"
else
echo $1 not valid
exit 1
fi
when I do
./test.sh brazil1
I get: (4 Replies)
how can i specify more than 1 consition in the following AWK statament??
i.e. if $2 is ABCD and $3 is MNOP and $4 is KLPM
similarly for OR
#!/bin/ksh
awk -F '' ' $2 == "ABCD" { print $2, $3;}' file.xml (2 Replies)
Hi,
When i use the below code snippet in my shell script OFC_10.sh:
if
then
echo "Success"
exit 2
elif
then
echo "Failure"
exit 6
I get the error message:
./OFC_10.sh: line 41: '
./OFC_10.sh: line 45: '
Line 41 is the line where If loop starts and line 45 is... (2 Replies)
Deal Experts
I am working on a script to find a date which is 7 days older and follwoing is my approach
#!/bin/sh
Yr=`date +"%Y"`
Mn=`date +"%m"`
Md=28
Da=`date +"%d"`
echo $Yr
echo $Mn
echo $Da
var1=$Yr$Mn$Da
echo "before" $var1
if expr $Da > 7
then Da=`expr $Da - 7`... (3 Replies)
Hello Unix-Forums!
It has been a long time since my last post, but finally I've got a new question:
I know in case you can use multiple patterns by
case $var in
a|b|c|ab)
and so on.
But how would I place an OR between
if ]
then
...
if ]
then
...
I want to execute the "..." if... (3 Replies)
Fellas,
Am new to unix os/ and here the situation , I am trying to write multiple condition statement inside if but it throws me a error
here is my piece of code ,
if ] && ] && ]
then
commands
fi
error : line 15 : `
can someone please advise me how to fix it
Please use... (7 Replies)
Hi Gurus,
Is there a way we can set a logic for this problem ?
The input file looks like below;
1 15 17
2 8 12
3 18 24
4 21 23
5 2 4
6 11 25
So, I would like to print for any row of the input file where the range of value between $2 to $3 lies within the min and max values of Min=10... (2 Replies)
I am analyzing one of the scripts written by another person.script is having multiple if conditions and everything are nested.The code is not formatted properly.Is there any way to identify in Unix to identify begin and end of a particular if block? (6 Replies)
Perl::Critic::Policy::ControlStructures::ProhibitPostfixUserrContributed PerlPerl::Critic::Policy::ControlStructures::ProhibitPostfixControls(3pm)NAME
Perl::Critic::Policy::ControlStructures::ProhibitPostfixControls - Write "if($condition){ do_something() }" instead of "do_something() if
$condition".
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
Conway discourages using postfix control structures ("if", "for", "unless", "until", "when", "while") because they hide control flow. The
"unless" and "until" controls are particularly evil because they lead to double-negatives that are hard to comprehend. The only tolerable
usage of a postfix "if"/"when" is when it follows a loop break such as "last", "next", "redo", or "continue".
do_something() if $condition; # not ok
if ($condition) { do_something() } # ok
do_something() while $condition; # not ok
while ($condition) { do_something() } # ok
do_something() unless $condition; # not ok
do_something() unless ! $condition; # really bad
if (! $condition) { do_something() } # ok
do_something() until $condition; # not ok
do_something() until ! $condition; # really bad
while (! $condition) { do_something() } # ok
do_something($_) for @list; # not ok
LOOP:
for my $n (0..100) {
next if $condition; # ok
last LOOP if $other_condition; # also ok
next when m< 0 z >xms; # fine too
}
CONFIGURATION
A set of constructs to be ignored by this policy can specified by giving a value for 'allow' of a string of space-delimited keywords: "if",
"for", "unless", "until", "when", and/or "while". An example of specifying allowed flow-control structures in a .perlcriticrc file:
[ControlStructures::ProhibitPostfixControls]
allow = for if until
By default, all postfix control keywords are prohibited.
The set of flow-control functions that are exempt from the restriction can also be configured with the 'flowcontrol' directive in your
.perlcriticrc file:
[ControlStructures::ProhibitPostfixControls]
flowcontrol = warn die carp croak cluck confess goto exit
This is useful if you're using additional modules that add things like "assert" or "throw".
NOTES
The "die", "croak", and "confess" functions are frequently used as flow-controls just like "next" or "last". So this Policy does permit
you to use a postfix "if" when the statement begins with one of those functions. It is also pretty common to use "warn", "carp", and
"cluck" with a postfix "if", so those are allowed too.
The "when" keyword was added to the language after Perl Best Practices was written. This policy treats "when" the same way it does "if",
i.e. it's allowed after flow-control constructs. Thanks to brian d foy for the inspiration
<http://www.effectiveperlprogramming.com/blog/543>.
BUGS
Look for the "do {} while" case and change the explanation to point to page 123 when it is found. RT #37905.
AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license
can be found in the LICENSE file included with this module.
perl v5.14.22012-06-0Perl::Critic::Policy::ControlStructures::ProhibitPostfixControls(3pm)