07-03-2008
Why not? In that case you do not even need to use variable variables at all, if all of the data are from a file. Of course, how to do it depends on how you read from the file.
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1. Shell Programming and Scripting
is it possible to use eval to create constants in perl? i cannot seem to get anything to work, and my searches are turning up little to nothing. an example of what i am trying to do is this:
2 arrays:
array 1: 'FOOD','NUMBER','OS'
array 2: 'pizza','two','unix'
loop through the arrays and... (5 Replies)
Discussion started by: effigy
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2. Shell Programming and Scripting
Hi using the below cmd i am identifying wheether last character in each line in thousands of files as semicolon or not.If last character is semicolon i am removing semicolon .If last character is not semicolon then i am appending next line to present line .
For example my input file consists of... (4 Replies)
Discussion started by: dbsurf
4 Replies
3. Shell Programming and Scripting
Here is my perl Program:
#!/usr/bin/perl -w
my $a="sam";
my $b="ste";
my $c="abcdef";
my $d=931;
$str="
@<<<<< @>>>>>>>>>> @|||||||||||||||||||| @#########
\$a,\$b,\$c,\$d
.";
open(FILE,">abc.txt");
$temp="format FILE = $str";
eval $temp;
write FILE;
print FILE "\n\n"; (3 Replies)
Discussion started by: sameerstephen
3 Replies
4. Shell Programming and Scripting
Hi,
I have 3 arrays:
@arr1=("Furthermore, apigenin treatment increased the level of association of the RNA binding protein HuR with endogenous p53 mRNA","one of the mechanisms by which apigenin induces p53 protein expression is enhancement of translation through the RNA binding protein... (1 Reply)
Discussion started by: vanitham
1 Replies
5. Shell Programming and Scripting
Hi all,
some small script with eval turned me to crazy.
my OS is linux
Linux s10-1310 2.6.16.53-0.8.PTF.434477.3.TDC.0-smp #1 SMP Fri Aug 31 06:07:27 PDT 2007 x86_64 x86_64 x86_64 GNU/Linux
below script works well
#!/bin/bash
eval ssh remotehost date
eval ssh remotehost ls
below... (1 Reply)
Discussion started by: summer_cherry
1 Replies
6. Shell Programming and Scripting
Hi All,
I read the above written code (perl code) in another perl script and evaluates this code for each line of text file,but using exit statement in code make this not to work and i could not get the desired results. However if i use return it works fine. I just need to know why it doesn't... (1 Reply)
Discussion started by: sarbjit
1 Replies
7. Shell Programming and Scripting
Hello All,
I am trying to use perl eval in a complex code and below given is a pseudo code of my logic.
Here $result evalutes to empty.
Please help.How should I retrieve of $t where $f just hold the name of varaible i.e t
$t=10;
$f='$t';
$result=eval "\$$f";
print "$result\n"; (3 Replies)
Discussion started by: prasperl
3 Replies
8. Shell Programming and Scripting
anyone has any info on why this is complaining???
vivek@vivek-c5e55ef2e ~/TAC
$ zoneCounter=1
vivek@vivek-c5e55ef2e ~/TAC
$ optUsage1=23%
vivek@vivek-c5e55ef2e ~/TAC
$ eval eval echo "<th>Zone $zoneCounter </th><th align=\"left\"> \$optUsage$zoneCounter </th>"
-bash: syntax error... (1 Reply)
Discussion started by: vivek d r
1 Replies
9. Shell Programming and Scripting
anyone has any info on why this is complaining???
vivek@vivek-c5e55ef2e ~/TAC
$ zoneCounter=1
vivek@vivek-c5e55ef2e ~/TAC
$ optUsage1=23%
vivek@vivek-c5e55ef2e ~/TAC
$ eval eval echo "<th>Zone $zoneCounter </th><th align=\"left\"> \$optUsage$zoneCounter </th>"
-bash: syntax error... (13 Replies)
Discussion started by: vivek d r
13 Replies
10. Shell Programming and Scripting
I have the following string :
Cat dog fox catepillar bear foxy
I need to replace "cat" and "fox" words from this sentence to word "animal"
I do the following:
$Str1="cat";
$Str2="fox";
$NewStr="animal";
open(F1, "<$inputFile") or die "Error: $!";
open(F2, ">$outputFile") or... (1 Reply)
Discussion started by: AIX_30
1 Replies
LEARN ABOUT OPENDARWIN
variable
variable(n) Tcl Built-In Commands variable(n)
__________________________________________________________________________________________________________________________________________________
NAME
variable - create and initialize a namespace variable
SYNOPSIS
variable ?name value...? name ?value?
_________________________________________________________________
DESCRIPTION
This command is normally used within a namespace eval command to create one or more variables within a namespace. Each variable name is
initialized with value. The value for the last variable is optional.
If a variable name does not exist, it is created. In this case, if value is specified, it is assigned to the newly created variable. If
no value is specified, the new variable is left undefined. If the variable already exists, it is set to value if value is specified or
left unchanged if no value is given. Normally, name is unqualified (does not include the names of any containing namespaces), and the
variable is created in the current namespace. If name includes any namespace qualifiers, the variable is created in the specified names-
pace. If the variable is not defined, it will be visible to the namespace which command, but not to the info exists command.
If the variable command is executed inside a Tcl procedure, it creates local variables linked to the corresponding namespace variables (and
therefore these variables are listed by info locals.) In this way the variable command resembles the global command, although the global
command only links to variables in the global namespace. If any values are given, they are used to modify the values of the associated
namespace variables. If a namespace variable does not exist, it is created and optionally initialized.
A name argument cannot reference an element within an array. Instead, name should reference the entire array, and the initialization value
should be left off. After the variable has been declared, elements within the array can be set using ordinary set or array commands.
SEE ALSO
global(n), namespace(n), upvar(n)
KEYWORDS
global, namespace, procedure, variable
Tcl 8.0 variable(n)