Sponsored Content
Top Forums Shell Programming and Scripting Perl variable type assessment Post 302278693 by gehlnar on Wednesday 21st of January 2009 02:30:08 AM
Old 01-21-2009
Zaxon,

Its upto perl interpretor to decide whether variable type is floating ,integer or string.

For instance :
$i =5 ; (For perl interpreter it is a integer datatype)
$i =5.2 ; (For perl interpreter it is a floating datatype)
$i ="MY Perl" ; (For perl interpreter it is a String datatype)

So basically it is all about declaration and assigning value to scalar value will help you to understand the type of data type it is.

Cheers,
gehlnar
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Problem with variable type

Dear All, I am trying to write an script to calculate geometric centre of selected residues of a protein structure. Say I have a PDB file (a text containing the x, y, and z coordinates of atoms of a protein). I want to extract the X coordinates of the atoms belonging to the interested residues... (2 Replies)
Discussion started by: siavoush
2 Replies

2. Shell Programming and Scripting

determine file type with perl

Hello i will like to know please how can i determine file type inside perl script not using the unix "file" program Thanks allot (1 Reply)
Discussion started by: umen
1 Replies

3. Shell Programming and Scripting

how to get type of variable in perl

hello all how can i get the type of variable in perl like typeof(var); in javascript for instance ? to know if the variable is int or string ? (2 Replies)
Discussion started by: umen
2 Replies

4. Shell Programming and Scripting

getting type of variable

Hello: Is there any way to tell the type of a passed or entered variable, if it is a string or integer,...etc. Thanks a lot (2 Replies)
Discussion started by: aladdin
2 Replies

5. Shell Programming and Scripting

use perl to get file type ?

Can anybody please tell me how can I determine whether a file is SYMBOLIC LINK, using the stat() function ? So far I have this: my @attrs = stat($fileName); my $mode = $attrs; What next ? (1 Reply)
Discussion started by: the_learner
1 Replies

6. Shell Programming and Scripting

Perl data type checking

I am using perl 5.8.0. I need to check some values to see it they are floats. Our system does not have Data::Types so I can't use is_float. Is there something else that I can use? The only thing in Data is Dump.pm. I am not allowed to download anything to our system so I have to use what I have.... (3 Replies)
Discussion started by: ajgwin
3 Replies

7. Programming

C++ type-casting a member variable in const methods

Is it permitted to type-cast a member variable passed in as a parameter in a member const method .. I am doing something like : in a return-type method () const { variable other = long(member variable) } this other assigned variable is not updating and I wonder if type-casting in such... (1 Reply)
Discussion started by: shriyer123
1 Replies

8. Shell Programming and Scripting

what is the default return type of localtime() in perl?

Hi, I have given like this to get the time of the sub routine. my $start = localtime(); print "\n start time: $start \n"; Output start time: Fri Apr 29 01:01:31 2011 I want to know what is the format of the time. I am not able to follow is is HH:MM:SS or MM:HH:SS os... (2 Replies)
Discussion started by: vanitham
2 Replies

9. Shell Programming and Scripting

What is a type of this variable?

I have a question about the type of this variable checkU= sudo cat /etc/passwd: grep $uname: wc -l I write a script to check the existent of username that get from the keyboard. If there is no username,it will create the username else it show the 'Duplicate name" message. The problem is it... (4 Replies)
Discussion started by: thsecmaniac
4 Replies

10. Programming

Strange value of the double type variable: -nan(0x8000000000000)

I am confused by the value of "currdisk->currangle" after adding operation. Initially the value of "currdisk->currangle" is 0.77500000000000013, but after adding operation, it's changed to "-nan(0x8000000000000)", Can anyone explain ? Thanks! The following is the occasion of gdb debugging. 3338 ... (8 Replies)
Discussion started by: 915086731
8 Replies
NetSDS::Util::Types(3pm)				User Contributed Perl Documentation				  NetSDS::Util::Types(3pm)

NAME
NetSDS::Util::Types - type checking routines SYNOPSIS
use NetSDS::Util::Types; # Check if variable contains integer value if (is_int($var)) { $var++; } else { print "Value is not integer!"; } DESCRIPTION
"NetSDS::Util::Types" module contains functions for checking data for being of exact data types. EXPORTED FUNCTIONS
is_int($var) - check if parameter is integer Check if given parameter is integer is_float([...]) - check if parameter is float number Check if given parameter is float number is_date([...]) - check if parameter is date string Return 1 if parameter is date string is_binary([...]) - check for binary content Return 1 if parameter is non text. is_ref_scalar($ref) - check if reference to scalar value Return true if parameter is a scalar reference. my $var = 'Scalar string'; if (is_ref_scalar($var)) { print "It's scalar value"; } is_ref_array($ref) - check if reference to array Return true if parameter is an array reference. is_ref_hash($ref) - check if hashref Return true if parameter is a hash reference. is_ref_code($ref) - check if code reference Return true if parameter is a code reference. is_ref_obj($ref, [$class_name]) - check if blessed object Return true if parameter is an object. EXAMPLES
None BUGS
None TODO
Add more functions. SEE ALSO
None. AUTHORS
Valentyn Solomko <pere@pere.org.ua> Michael Bochkaryov <misha@rattler.kiev.ua> perl v5.12.4 2011-08-27 NetSDS::Util::Types(3pm)
All times are GMT -4. The time now is 07:52 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy