soumdgr8

• Aug 1st, 2015

If its UNIX (ish) Env., use below"perl #tail.pl #this will work for default behaviour of tail(i.e. last 10 lines), you can enhance it to tail certain no. of lines #usage : tail.pl ...

Arunesh

• Jun 15th, 2015

You can do it in one liner

Code
perl -lne push(@tail,$_);shift @tail if($#tail >=10);END{print $_ foreach(@tail)} filename

Answer Question  Select Best Answer

Gaurav.khurana

 Profile Answers by Gaurav.khurana Questions by Gaurav.khurana

• Apr 18th, 2015

R should be small here i.e.
`rm -rf /home/udzial/*`

Navrattan

• Oct 8th, 2013

Rmtree () is function which is used to remove a directory which has files in it

Answer Question  Select Best Answer

pritish pattanaik

• Feb 15th, 2017

- Dont use Perl when you have no idea about Perl.
- Dont use Perl when you have no idea about its use.
- Dont use Perl if don't understand this (TMTOWTDI)

ahinav

• Aug 22nd, 2015

Please read the question again ... when NOT to use perl ....

Answer Question  Select Best Answer

You have unsorted array of strings, like:my @arr = qw(hello World Show must go on);Print this array, sorted in reversed case-insensitive order.

iamkamalnayan

 Profile Answers by iamkamalnayan Questions by iamkamalnayan

• Dec 26th, 2016

Code
print join  , sort {lc $b cmp lc $a} @arr;

Gaurav.khurana

 Profile Answers by Gaurav.khurana Questions by Gaurav.khurana

• Apr 18th, 2015

Code
        @array = qw( Udzial IS going Where means  How are Youu you share);
        print join (" ", reverse(sort{lc($a) cmp lc ($b) } (@array)));
     #  cmp used to do characters sort and 
     #  lc to do case insensitive
     # after sorting applied reverse on it

Answer Question  Select Best Answer

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

 Profile Answers by sergant Questions by 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...

Answer Question  Select Best Answer

1) Input ip address. Check if it is in the range 172.125.1.0 and 172.125.25.0 using only regular expressions in Perl. Do not use parse functions.

2) Input a name. Check if it is valid (has at-least 3 letters and one vowel) using only return functions and regular expressions in Perl. Do not use parse functions.

3) Input email address. Check if it is valid using return function...

josepla

 Profile Answers by josepla Questions by josepla

• Jan 11th, 2017

using regex for all 3 questions IP, Name and Email"perl use v5.24; use utf8; use open :std, :encoding(cp437); # Encoding used by console, to check console type in Windows cmd us...

praveen

• Nov 29th, 2016

$ip=;
chomp($ip);
if ($ip =~ /^172.125.([1-9]|1[1-9]|2[1-5]).0/){print "$ip in range
" ;}
else{print "$ip not in range
"};

Answer Question  Select Best Answer

How to install Perl module using CPAN. How to include the module in a program?

ankitloud

 Profile Answers by ankitloud Questions by 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 work

Navshere

 Profile Answers by Navshere Questions by Navshere

• Aug 19th, 2011

Perl Makefile.PL
nmake
nmake test
nmake install

# To check successive installation
perl -e "use Twig"

Answer Question  Select Best Answer

george

• Oct 11th, 2013

Die will print a message to the std err, then exit with a non-zero return code. You dont control the return code and you are stuck with the text going to the std err. Exit will terminate with a speci...

vinod

• Jun 20th, 2013

Exit will simply end the program but die will print the message before ending the program

Answer Question  Select Best Answer

shah

• May 16th, 2018

Its wrong sangeeta. To implement a stack in perl, we have to use push and pop function, push will add an element at the end of array and pop will remove the element from the end of array

singh_Pushpendra

 Profile Answers by singh_Pushpendra Questions by singh_Pushpendra

• Aug 13th, 2010

#! /usr/bin/perl -w$str1="Pushpendra Singh";@str=split("", $str1);@stack_array=();foreach $i (@str){ print "nt Item being pushed is : $i"; push(@stack_a...

Answer Question  Select Best Answer

soumdgr8

• Aug 1st, 2015

Is used for chaining elements of a reference type. The element can be another reference, scalar, array, function, object

shalusanju

 Profile Answers by shalusanju Questions by 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...

Answer Question  Select Best Answer

gireeshkumar.kg

 Profile Answers by gireeshkumar.kg Questions by gireeshkumar.kg

• Jun 29th, 2009

* PERL is programmer friendly. It is easy to code and can do it in less number of lines. It does all the nice things with minimum fuzz.* Text manipulation is unmatched. * It has built-in regex.* Has the support of world's largest archive of modules(CPAN)

ashwini chavan

 Profile Answers by ashwini chavan Questions by ashwini chavan

• Jul 22nd, 2008

It is having the features of scripting (Shell) as well as programming (like C). Using PERL you can easily do the system administration works where comparitively difficult with Shell script.

Answer Question  Select Best Answer

komal

• Sep 29th, 2016

$^0 print OS name

Yogesh

• Sep 14th, 2016

$^O prints the os name and $^0 prints the default heading format

Answer Question  Select Best Answer

nitashaa

 Profile Answers by nitashaa Questions by nitashaa

• Jul 15th, 2008

require function is used to load a seperate perl script or module in run time.If the file to be loaded is not in the directories listed in @INC array then full path of the perl file is to be passed in...

Swanand

• Mar 27th, 2007

'require' is like a preprocessor directive in C/C++ which imports the external file .You can use the subroutines inside the current source code which are defined in the external file.require 'coreDBlib.pl'?=>> #include

Answer Question  Select Best Answer

ashwini chavan

 Profile Answers by ashwini chavan Questions by ashwini chavan

• Jul 22nd, 2008

Hash is an associative array where data is stored in "key"->"value" pairs.Eg : fruits is a hash having their names and price%fruits = ("Apple", "60", "Banana", "20", "Peers", "40");

wow_suraj

 Profile Answers by wow_suraj Questions by wow_suraj

• May 2nd, 2008

Hash is also known as 'Associative array' sometimes. It basicaly contains of two parts first is key and value. It is very much like a name given for a value.Ex. A student with his/her roll number can ...

Answer Question  Select Best Answer

vasu

• Dec 19th, 2011

Code
#!/usr/bin/perl
use strict;
use warnings;
my @myNames = (Jacob, Michael, Joshua, Matthew, Alexander, Andrew);
my  @grepNames = grep(/^m(.*)$/i, @myNames);
foreach my $grepNames (@grepNames) {
        print"the value is :".$grepNames."
";
} 
 

contactparagm

 Profile Answers by contactparagm Questions by 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...

Answer Question  Select Best Answer

Suppose you run a program/script in Perl:system("./server ....");How will you check the return code?

contactparagm

 Profile Answers by contactparagm Questions by contactparagm

• Dec 3rd, 2010

Perl defines predefined variable $? which gives the return code of last command executed.

amitkshirsagar

 Profile Answers by amitkshirsagar Questions by 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.

Answer Question  Select Best Answer

gireeshkumar.kg

 Profile Answers by gireeshkumar.kg Questions by gireeshkumar.kg

• Jun 29th, 2009

1)Usei) use for loading the modules( Should not give the .pm extension)ii) The loaded module is verified at the compile time.2) Requirei) Use for loading the modules and perl programs( .pm extension i...

prabhasgupte

 Profile Answers by prabhasgupte Questions by prabhasgupte

• Feb 12th, 2008

There is one more basic difference between 'use' and 'require'.When you 'use' the control is passed to that file at runtime.Whereas, when you 'require' the code from th...

Answer Question  Select Best Answer

ashwini chavan

 Profile Answers by ashwini chavan Questions by ashwini chavan

• Jul 22nd, 2008

The most commonly used global scalar variable is the $_ variable. Many Perl functionsand operators modify the contents of $_ if you do not explicitly specify the scalarvariable on which they are to op...

prabhath_01

 Profile Answers by prabhath_01 Questions by prabhath_01

• May 31st, 2008

It is called as default variable in Perl.It hold the current value in any block ie., 'for' or 'while'. Eg.,******************************************print "n", $_ for (1..10)...

Answer Question  Select Best Answer

sharmasundip

 Profile Answers by sharmasundip Questions by sharmasundip

• Aug 18th, 2009

It is a?infix dereference operator like in C++.

prabhath_01

 Profile Answers by prabhath_01 Questions by 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 = [ ...

Answer Question  Select Best Answer

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

 Profile Answers by rahulashu Questions by 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...

Answer Question  Select Best Answer