-
PERL Symbol Table
What is Symbol table and how it Works?
gireeshkumar.kg
- Jun 30th, 2009
Symbol table is a PERL structure which contains the identifier names(like 'variable'). The identifier became actual variable ($variable,@variable etc)?type when it associate through typeglob.Symbol table contains only global variables.
harjot kaur
- Jul 5th, 2008
The symbol table is the list of active symbols (functions, variables, objects) within a package. Each package has its own symbol table, and with some exceptions, all the identifiers starting with lett...
-
What does this symbol mean '->'
prabhath_01
- May 31st, 2008
Uses of "->" Operator:###################1) Reference the method of a module.use CGI;my $cgi = new CGI ();$cgi->header();2) In Perl it is an infix dereference operator. $arr = [ ...
-
How to find type of variable?
How to find out whether reference is pointing to a scalar, array or hash?
-
Rename Datastage jobs through perl
Please provide me Perl scriptwhich reads the data from xcel sheet and renames the dsx file.Process followed to rename is:make a list of old and new file names in xcel sheet.compare the old file name in the xcel sheet with dsx name.If both are equal then assign the new name to the dsx which is mentioned in the xcel sheet.Kindly please help me in this.Expecting a reply soon..
gansi
- Sep 30th, 2009
use Win32::OLE;use Win32::OLE::Enum;use Win32::OLE qw(in with);use Win32::OLE::Const 'Microsoft Excel';use Win32::OLE::Variant;use Spreadsheet::ParseExcel;use Spreadsheet::WriteExcel;use Sprea...
-
How to substitute a particular string in a file containing millions of records?
ratul2783
- May 3rd, 2010
perl -p -i -e "s/search_string/replace_string/g" SourceFileThe -p option ensures that $_ is assigned each line of each input file in turn and that the program is executed once for each input line.The ...
-
What is the difference between the function oriented and Object oriented approach in the modules (CPAN). Mention the merits as well demerits of these two types.
shalusanju
- Aug 14th, 2010
In the object-oriented style you create one or more CGI objects and then use object methods to create the various elements of the page. Each CGI object starts out with the list of named parameters tha...
-
How do you you check the return code of a command in Perl
Suppose you run a program/script in Perl:system("./server ....");How will you check the return code?
contactparagm
- Dec 3rd, 2010
Perl defines predefined variable $? which gives the return code of last command executed.
amitkshirsagar
- Jun 22nd, 2009
$r = system("command .. e.g. search");print"r is $rn";Here, if $r is 0, that means command has executed successfully.Any other value means command has failed.
-
Create a Perl script
Hello,------------------------------------------- id name address 1 cristine New York 2 murray Redmond 3 kumar Sunnyvale-------------------------------------------This is 'sample.xlsx' file. (Can't attach the image.)'id' string in A1, 'name' in B1, 'address' in C1 column in excel file.Create a Perl script to store the information about...
-
Create a Perl script to store the information in Excel
Hello,--------------------------------------id name address1 cristine New York 2 murray Redmond3 kumar Sunnyvale --------------------------------------This is 'samples.xlsx' file.'id' string in A1, 'name' in B1, 'address' in C1 column in excel file.Create a Perl script to store the information about employee using the header as in raw 1. The Perl...
elavv
- Aug 10th, 2011
You can construct one hash where the the emp id as key to the hash and rest of the elements as values in the structure of array ref. "perl #! use strict; use Spreadsheet::ParseExce...
-
Install Perl module using CPAN
How to install Perl module using CPAN. How to include the module in a program?
ankitloud
- Nov 20th, 2011
I think the best option will be : type following command on command prompt
cpan App::cpanminus then you can install any module using its name using following command
cpan Module::Apache
let me know if it doesn't workNavshere
- Aug 19th, 2011
Perl Makefile.PL
nmake
nmake test
nmake install
# To check successive installation
perl -e "use Twig" -
What is Grep used for in Perl?
vasu
- Dec 19th, 2011
Code- #!/usr/bin/perl
- /^m(.*)$/i"the value is :""
- ";
- }
contactparagm
- Dec 3rd, 2010
"grep" is a built function which extract all elements in ARRAY, matched by regex/pattern given as argument for grep and return the resultant elements in an array.perl syntax: &nbs...
-
What is meant by 'chomp'? where do we require this ?
babu
- Jun 20th, 2012
Hi i am babu.chomp is pre define function it will delete last character if it is a new line character ex1:$a="babu "; chomp($a); print $a;#it will not print new line ...after babu. ex2:print "Enter a...
sergant
- Apr 28th, 2012
chomp VARIABLE chomp( LIST ) chomp This safer version of "chop" removes any trailing string that corresponds to the current value of $/ (also known as $INPUT_RECORD_SEPARATOR in...
-
-
What's the significance of @ISA, @EXPORT @EXPORT_OK %EXPORT_TAGS list & hashes in a perl package? With example?
Jatin
- Jan 5th, 2013
%EXPORT_TAGS = (tag_name => [anonymous array/Array reference]); It is to provide the tag to Anonymous array/Array reference which is generally @EXPORT_OK for example: %EXPORT_TAGS = (all => @EXPORT_O...
terrytlin
- Dec 3rd, 2009
Package NewModule;use Exporter; # an application by ‘use’ operator.# This Exporter package has @ISA array to look for a specific method, this array keeps track of classes it is inheriting....
-
-
How to remove a directory which has few files in it? I know about rmdir however it does not remove a dir which has files/dir in it!
Navrattan
- Oct 8th, 2013
Rmtree () is function which is used to remove a directory which has files in it
-
What is -> Symbol in perl
soumdgr8
- Aug 1st, 2015
Is used for chaining elements of a reference type. The element can be another reference, scalar, array, function, object
shalusanju
- Aug 13th, 2010
In object oriented PERL, the arrow -> symbol is used for creating or accessing a particular object of a class. For eg. in Perl/Tk 1. use Tk; my $main_win = MainWindow->new(); Here we u...
What is the difference between a perl program and a shell script? Which out of these is easier to understand and execute? And How?
sandeep
- Oct 23rd, 2015
Are you sure that its necessary to provide semicolon.
Because I have tried it and it works without them also.rahulashu
- Jun 10th, 2008
if the number of functionality is no more then we can go for the unix but if u are working for database connectivity...
Perl Usage
How do you use Perl in Insurance domain related projects, What kind of work you automate in it. what are the main responsibilities.
Ans