Perl is an interpreted programming language created in 1987 that provides powerful text processing capabilities. It is portable, supports rapid prototyping, and follows the philosophy of "there's more than one way to do it". To use Perl, it needs to be installed which is usually already done on Linux and Mac systems. Common Perl data types include numbers, strings, and scalar variables to store single values. Perl includes typical operators for mathematics and strings, and conditional statements like if/else to control program execution based on comparisons.
Correctly understanding the eight data types in PHP is essential to a solid foundation in development. Come refresh your knowledge of the scalar types, compound types, and special data types used in PHP, and learn about proper usage of each. Review type juggling, learn some common data type traps to avoid, and how to code defensively to prevent having the data type of a variable change unexpectedly. Finally learn how unit tests can help verify that code is handling data types correctly.
All variables in PHP start with a $ (dollar) sign followed by the name of the variable.
A valid variable name starts with a letter (A-Z, a-z) or underscore (_), followed by any number of letters, numbers, or underscores.
If a variable name is more than one word, it can be separated with underscore (for example $employee_code instead of $employeecode).
'$' is a special variable that can not be assigned.
Correctly understanding the eight data types in PHP is essential to a solid foundation in development. Come refresh your knowledge of the scalar types, compound types, and special data types used in PHP, and learn about proper usage of each. Review type juggling, learn some common data type traps to avoid, and how to code defensively to prevent having the data type of a variable change unexpectedly. Finally learn how unit tests can help verify that code is handling data types correctly.
All variables in PHP start with a $ (dollar) sign followed by the name of the variable.
A valid variable name starts with a letter (A-Z, a-z) or underscore (_), followed by any number of letters, numbers, or underscores.
If a variable name is more than one word, it can be separated with underscore (for example $employee_code instead of $employeecode).
'$' is a special variable that can not be assigned.
** Linux Admin Certification Training: https://www.edureka.co/linux-admin **
This "Shell Scripting Tutorial" PPT gives you an extensive explanation about Shell Scripting in Linux. It covers the essential concepts such as using variables, basic operators, loops & functions.
It also gives you an insight by scaling down some real-time scenarios and demonstrating them using the virtual machine.
Getting started with Linux
Command Line Essentials
Shell Script Basics
Using Variables
Basic Operations
Shell Loops
Shell Functions
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These are the slides I was using when delivering a short talk in Vienna PHP. The talk took place in Vienna on September 22th. More information about the PHP course I deliver can be found at php.course.lifemichael.com
This is a "PHP 201" presentation that was given at the December 2010 Burlington, Vermont PHP Users group meeting. Going beyond the basics, this presentation covered working with arrays, functions, and objects.
BioPerl is an active open source software project supported by the Open Bioinformatics Foundation.
BioPerl is a product of community effort to produce Perl code which is useful in biology.
BioPerl is a collection of Perl modules
It has played an integral role in the Human Genome Project
** Linux Admin Certification Training: https://www.edureka.co/linux-admin **
This "Shell Scripting Tutorial" PPT gives you an extensive explanation about Shell Scripting in Linux. It covers the essential concepts such as using variables, basic operators, loops & functions.
It also gives you an insight by scaling down some real-time scenarios and demonstrating them using the virtual machine.
Getting started with Linux
Command Line Essentials
Shell Script Basics
Using Variables
Basic Operations
Shell Loops
Shell Functions
Follow us to never miss an update in the future.
YouTube: https://www.youtube.com/user/edurekaIN
Instagram: https://www.instagram.com/edureka_learning/
Facebook: https://www.facebook.com/edurekaIN/
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LinkedIn: https://www.linkedin.com/company/edureka
These are the slides I was using when delivering a short talk in Vienna PHP. The talk took place in Vienna on September 22th. More information about the PHP course I deliver can be found at php.course.lifemichael.com
This is a "PHP 201" presentation that was given at the December 2010 Burlington, Vermont PHP Users group meeting. Going beyond the basics, this presentation covered working with arrays, functions, and objects.
BioPerl is an active open source software project supported by the Open Bioinformatics Foundation.
BioPerl is a product of community effort to produce Perl code which is useful in biology.
BioPerl is a collection of Perl modules
It has played an integral role in the Human Genome Project
This present study explored the effectiveness of the Indian celebrities in product endorsement/promotion and the association between demographic variables and celebrity endorsements. The research sampled 290 respondents from in and around Chennai. Frequency, Mean and Chi square statistics were used to analyse the data. Results show (1) Sachin Tendulkar is the most effective celebrity, (2) Soft drink and Two Wheeler/Car are the most effective products endorsed/promoted by celebrities and (3) Respondents across the board feel that these celebrities are effective in promoting the products.
In this newsletter you can read all the updates on DAKTARI in July and August. This means new animals rescued, volunteers, children, sponsors, etc.
Kindest regards,
the DAKTARI-team.
Dealing with Legacy Perl Code - Peter ScottO'Reilly Media
Peter Scott, author of the O'Reilly School of Technology's Perl Programming Certificate series, talks about how to deal with "legacy" Perl code - written by someone else, or maybe even yourself when you were younger and less wise.
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
Have you ever wanted a Ruby client API to communicate with your web service? Smithy is a protocol-agnostic language for defining services and SDKs. Smithy Ruby is an implementation of Smithy that generates a Ruby SDK using a Smithy model. In this talk, we will explore Smithy and Smithy Ruby to learn how to generate custom feature-rich SDKs that can communicate with any web service, such as a Rails JSON API.
Generating a custom Ruby SDK for your web service or Rails API using Smithy
Perl courseparti
1. Introduction to Perl progammingPart I 16/12/2010 Ernesto Lowy CRG Bioinformatics core
2. What is Perl? Perl is a programming language extensively used in bioinformatics Created by Larry Wall in 1987 Provides powerful text processing facilities, facilitating easy manipulation of text files Perl is an interpreted language (no compiling is needed) Perl is quite portable Programs can be written in many different ways (advantage?) Perl slogan is "There's more than one way to do it” Rapid prototyping (solve a problem with fewer lines of code than Java or C)
3. Installing Perl Perl comes by default on Linux and MacOSX On windows you have to install it: http://strawberryperl.com/ (100% open source) http://www.activestate.com/ (commercial distribution-but free!) Latest version is Perl 5.12.0 To check if Perl is working and version $perl –v
9. 1000 #integer 1.25 #floating-point 1.2e30 #1.2 times 10 to the 30th power -1 -1.2 Only important thing to remember is that you never insert commas or spaces into numbers in Perl. So in a Perl program you never will find: 10 000 10,000 Perl basic data typesNumbers
10. A string is a collection of characters in either single or double quotes: “This is the CRG.” ‘CRG is in Barcelona!’ Difference between single and double quotes is: print “Hello!My name is Ernesto”; #Interprete contents Will display: >Hello! >My name is Ernesto print ‘Hello!My name is Ernesto’; #contents should be taken literally Will display: >Hello!My name is Ernesto Perl basic data typesStrings
11. Scalar variables Variable is a name for a container that holds one or more values. Scalar variable (contains a single number or string): $a=1; $codon=“ATG”; $a_single_peptide=“GMLLKKKI”; (valid Perl identifiers are letter,words,underscore,digits) Important! Scalar variables cannot start with a digit Important! Uppercase and Lowercase letters are distinct ($Maria and $maria) Example (Assignment operator): $codon=“ATG”; print “$codon codes for Methionine”; Will display: ATG codes for Methionine
12. Numerical operators Perl provides the typical operators. For example: 5+3 #5 plus 3, or 5 3.1-1.2 #3.1 minus 1.2, or 1.9 4*4 # 4 times 4 = 16 6/2 # 6 divided by 2, or 3 Using variables $a=1; $b=2; $c=$a+$b; print “$c”; Will print: 3
13. Special numerical operators $a++; #same than $a=$a+1; $b--; #same than $b=$b-1; $c +=10; #same than $c=$c+10;
14. String manipulation Concatenate strings with the dot operator “ATG”.”TCA” # same as “ATGTCA” String repetition operator (x) “ATC” x 3 # same as “ATCATCATC” Length() get the length of a string $dna=“acgtggggtttttt”; print “This sequence has “.length($dna).” nucleotides”; Will print: This sequence has 10 nucleotides convert to upper case $aa=uc($aa); convert to lower case $aa=lc($aa);
15. Conditional statements(if/else) Determine a particular course of action in the program. Conditional statements make use of the comparison operators to compare numbers or strings. These operators always return true/false as a result of the comparison
18. If/else statement Allows to control the execution of the program Example: $a=4; $b=10; If ($a>$b) { print “$a is greater than $b”; } else { print “$b is greater then $a”; }
22. Logical operators && (AND) Example: $hour=12; if ($hour >=9 && $hour <=18) { “You are supposed to be at work!”; } Will print: >You are supposed to be at work!
23. Boolean values Perl does not have the Boolean data type. So how Perl knows if a given variable is true or false? If the value is a number then 0 means false; all other numbers mean true Example: $a=15; $is_bigger=$a>10; # $is_bigger will be 1 If ($is_bigger) {….}; # this block will be executed
24. Boolean values If a certain value is a string. Then the empty string (‘’) means false; all other strings mean true $day=“”; #evaluates to false, so this block will not be executed if($day) { print $day contains a string }
25. Boolean values Get the opposite of a boolean value (! Operator) Example (A program that expects a filename from the user): print “Enter file name, please”; $file=<>; chomp($file); #remove from input If (!$file) { #if $file is false (empty string) print “I need an input file to proceed”; } #try to process the file
26. die() function Raises an exception, which means that throws an error message and stops the execution of the program. So previous example revisited: print “Enter file name, please”; $file=<>; chomp($file); #remove from input if (!$file) { #if $file is false (empty string) die(“I need an input file to proceed”); } #process the file only if $file is defined
27. Ex 2. Using conditional expressions TODO: Write a program to get an exam score from the keyboard and prints out a message to the student. Hint: To read input from keyboard enter in your program print "Enter the score of a student: "; $score = <>;
28. Solution #! /usr/bin/perl print "Enter the score of a student: "; $score = <>; if($score>=90) { print "Excellent Performance!"; } elsif ($score>=70 && $score<90) { print "Good Performance!”; } elsif ($score>=50 && $score<70) { print "Uuff! That was close!”; } else { print "Sorry, try harder!"; }
Editor's Notes
-Larry wall is a linguist-what does the Perl interpreter do? It compiles the program (source code) internally intobytecode and then executes it immediately. Perl is commonly known as an interpreted language, but this is not strictly true. Since the interpreter actually does convert the program into byte code before executing it, it is sometimes called an interpreter/compiler , if anything at all. [ 1 ] Although the compiled form is not stored as a file, release 5.005 of Perl includes a working version of a standalone Perl compiler.[1] So do you call something a Perl "script" or a Perl "program"? Typically, the word "program" is used to describe something that needs to be compiled into assembler or byte code before executing, as in the C language, and the word "script" is used to describe something that runs through an interpreter, as in the Bourne shell. For Perl, you can use either phrase and not worry about offending anyone.What does all this brouhaha mean for you? When you write a Perl program, you can just give it a correct #! line at the top of the script, make it executable with chmod +x , and run it. For 95% of Perl programmers in this world, that's all you'll care about.
-#! (hash-bang or shebang) tells the shell where to look for perl-The print built-in function is one of the most frequently used parts of Perl. You use it to display things on the screen or to send information to a file.-Perl program consists of statements, each of which ends with a semicolon.-”.pl” extension is optional but is commonly used-”-w” switches on warnings: is not required but it is advisable
-Perl identifier is what follows the dollar sign-Choosing Good Variable Names. You should generally select variable names that mean something regarding the purpose of the variable. For example, $r is probably not very descriptive but $line_length is.