What is Perl? Perl is a high-level, general-purpose programming language known for its flexibility, ease of use, and powerful text manipulation capabilities. Originally developed by Larry Wall in the late 1980s, Perl has evolved into a robust scripting language used for a wide range of applications. What is top use cases of Perl? Top Use…
Hey, this is Ashwani, and in this article I’m going to share some important things about Perl. As you see in the heading everything is clear to your mind that what I m going to cover in the article such as What is Perl, How it works, Overview and Its Use Cases. So, lets Start…
What is Perl Perl is a programming language, It’s Object Oriented, simple to learn and very powerful. Perl stand for: “Practical Extraction and Reporting Language”. Perl is an Interpreted language, so you don’t have to compile it like you do Java, C, C++ etc. For fast development work, that’s a godsend. Perl is a versatile,…
tpatil created the topic: Remove Control ^M from files Single file method perl -pi -e “s/\r//” filename.txt Multiple File Method find . -type f -exec perl -pi -e “s/\r//” {} \; rajeshkumar replied the topic: Re:Remove Control ^M from files I used to do in shell using following command > 1,$s/^M//g Correct me if I…
rajeshkumar created the topic: i need to a perl script Hi , There is a file called test.txt what are all the different ways BEGIN: test 1 test 2 %%%%%%%%%% TEST TEST TEST test 3 END: need to grab all contents in between BEGIN and END: Regards, Rajesh Kumar Twitt me @ twitter.com/RajeshKumarIn rajeshkumar replied…
rajeshkumar created the topic: The difference between my and local There is a subtle difference. In the example below, $::a refers to $a in the ‘global’ namespace. ‘local’ temporarily changes the value of the variable, but only within the scope it exists in. $a = 3.14159; { local $a = 3; print “In block, \$a…
scmuser created the topic: What is the meaning of rigging? Hi, Could you please tell me meaning of rigging in perl? Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra,…
scmuser created the topic: parenthesis after module name and without parenths What is the difference between having a parenthesis after module name and without parenthsis after module name?? i.e Package::Module(); Package::Module; Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel…
scmuser created the topic: question regarding to eval function I have one question regarding to eval function. I know eval function is use for error checking but I am not able to understand below line. eval \’exec perl -S $0 ${1+\”$@\”}\’ if 0; $0 for script name $@ set if error occur Rajesh KumarI’m a…
scmuser created the topic: Find a particular word in a paragraph Write a Perl script to find a particular word in a paragraph??? Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market tips at…
scmuser created the topic: Create a flat file database using perl How to create a flat file database as shown below s.no name age city phone 0 hema 22 Calcutta 4312542 1 hema 21 Bangalore 2344345 2 ganesh 25 delhi 2445454 3 kartik 45 pune 4312121 4 santosh 25 Hyderabad 2254231 5 kumar 25 mysore…
scmuser created the topic: Find whether a given line of text is starting and Write a perl script to find whether a given line of text is starting and ending with same word or not ??? Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech…
scmuser created the topic: use Vs require in perl Hi, Whats difference between “use” and “require” in perl? rajeshkumar replied the topic: Re: use Vs require in perl use is done at ‘compile-time’ and require is done at ‘run-time’ (ie can conditionally load modules) Regards, Rajesh Kumar Twitt me @ twitter.com/RajeshKumarIn rajeshkumar replied the topic:…
scmuser created the topic: Spit out warnings on uninitialized variables Perl How to Spit out warnings on uninitialized variables in Perl? rajeshkumar replied the topic: Re: Spit out warnings on uninitialized variables Perl #!/usr/local/bin/perl -w This will help you (really, it will force you) to write better, cleaner code. Adding the -w switch to the…
rajeshkumar created the topic: Installing Perl modules Perl modules may be installed using the CPAN module or from source. CPAN method perl -MCPAN -e shell (to get an interactive CPAN shell) perl -MCPAN -e ‘install Time::JulianDay’ (if you know the name of the module, you can install it directly without interacting with the CPAN shell)…
rajeshkumar created the topic: Access denied for user ‘ODBC’@’localhost I am getting following error while running following command…any help > perl -MCPAN -e “install DBD::mysql”; Error D:\wamp\bin\mysql\MYSQL5~1.36\bin\MYSQLA~1.EXE: connect to server at ‘localhost’ failed error: ‘Access denied for user ‘ODBC’@’localhost’ (using password: NO)’ Problem running D:\wamp\bin\mysql\MYSQL5~1.36\bin\MYSQLA~1.EXE – aborting … Regards, Rajesh Kumar Twitt me @ twitter.com/RajeshKumarIn…
rajeshkumar created the topic: perl -MCPAN -e “install DBD::mysql” I am getting following issues while running following command in Windows Machine… perl -MCPAN -e “install DBD::mysql” Error Regards, Rajesh Kumar Twitt me @ twitter.com/RajeshKumarIn Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at…
scmuser created the topic: Use of use DBI; Hi, why do we use following syntax in perl program. can you please explain it? use DBI; rajeshkumar replied the topic: Re: Use of use DBI; Perl’s coolest modules is the Perl database interface (DBI). This module offers a unified interface to different databases, providing a series…
rajeshkumar created the topic: connect to my MySQL database using Perl? #!/usr/bin/perl use DBI; $database = “DBNAME”; $hostname = “DBSERVER”; $port = “3306”; $username = “DBUSERNAME”; $password = ‘DBPASSWORD’; $dsn = “DBI:mysql:database=$database;host=$hostname;port=$port”; $dbh = DBI->connect($dsn, $username, $password) or die(“Could not connect!”); $sql = “SELECT * FROM mytable”; $sth = $dbh->prepare($sql); $sth->execute; while(($column1, $column2) = $sth->fetchrow_array)…
scmuser created the topic: Why we use ‘use strict’ in perl Hi, Why you should ‘use strict’? what is the significant of “strict” in out module? rajeshkumar replied the topic: Re: Why we use ‘use strict’ in perl Whenever your program gets over a few lines long, definitely when you can’t view the whole program…
scmuser created the topic: Why do you program in Perl? Why do you program in Perl? What are the advantages of Perl ovber python and other languages? Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark,…
scmuser created the topic: Difference between exec and system in perl? What are the Difference between exec and system in perl? please explain…. rajeshkumar replied the topic: Re: Difference between exec and system in perl? exec function in perl The exec function executes a system command and never returns; use system instead of exec if…
scmuser created the topic: embed perl in a C++ program / Java Program? How can I embed perl in a C++ program / Java Program? Any sample program?? Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday…
scmuser created the topic: How to read properties file using perl Hi, i would like to read properties file using perl…Any sample code or any example? My properties file is as such … variable1 = value variable2 = value tpatil replied the topic: Re: How to read properties file using perl Hope this helps…. {code}…
rajeshkumar created the topic: Creating file system info and put into mysql db Create a perl script for following task… 1. Read the directory mentioned by users and list all the files along with their size and Create a property file which has following info of each file. # Server name Path File Name date…
rajeshkumar created the topic: To test mysql remote server access using perl perl -MDBI -e ‘DBI->connect(“DBI:mysql:rajesh:rajeshk-W7″,”rajesh”,”rajesh123″) or die DBI->errstr;’ perl -MDBI -e ‘DBI->connect(“DBI:mysql:myDB:server2.whatever.co.uk”,”myuser”,”mypassword”) or die DBI->errstr;’ Regards, Rajesh Kumar Twitt me @ twitter.com/RajeshKumarIn Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps…
rajeshkumar created the topic: How to Open Directory and read and display all the file using perl Method 1 $DIR = “/home/rajesh”; $DIRHANDLE = “HANDLE”; opendir ($DIRHANDLE, “$DIR”) || die “Error Opening $DIR : $!”; @dirlist = readdir ($DIRHANDLE); foreach (@dirlist) { print “$_ \n”; } Method 2 @dirlist = `ls -A $DIR`; foreach (@dirlist)…
scmuser created the topic: How to identify which perl module has been installed. How to identify which perl module has been installed. rajeshkumar replied the topic: Re: How to identify which perl module has been installed. rmp -qa | grep perl Regards, Rajesh Kumar Twitt me @ twitter.com/RajeshKumarIn puneetbhatia77 replied the topic: Re: How to…
scmuser created the topic: find out which perl module installed? Hi, what is the way to find out perl module which has been installed in unix / linux system? rajeshkumar replied the topic: Re: find out which perl module installed? try out this? find `perl -e ‘print “@INC”‘` -name ‘*.pm’ -print | tee ~/Perl-modules-installed.txt Regards,…
scmuser created the topic: $_ and @_ in perl Hi, Can you please talk about $_ and @_ in perl? Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra, health…