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Data Structures and algorithms for beginners. Ace your coding interview. Watch this tutorial to learn all about Big O, arrays and linked lists!

🚀 Get interview-ready with my full course: https://bit.ly/2OwNTxx
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Need Java foundations first? Check out my tutorial: https://youtu.be/eIrMbAQSU34

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💡 What you'll learn:
- Big O notation for analyzing code efficiency.
- How to implement and use arrays.
- The basics of linked lists.

👉 This tutorial is perfect for you if:
- You're preparing for technical job interviews.
- You want to improve your coding fundamentals.
- You're a CS student learning these concepts.

Let's get started!

📖 TABLE OF CONTENT
0:00:00 Intro
0:01:04 What is Big O?
0:03:03 O(1)
0:04:32 O(n)
0:08:17 O(n^2)
0:10:41 O(log n)
0:13:20 O(2^n)
0:14:10 Space Complexity
0:17:53 Understanding Arrays
0:21:03 Working with Arrays
0:24:32 Exercise: Building an Array
0:27:24 Solution: Creating the Array Class
0:30:43 Solution: insert()
0:35:03 Solution: remove()
0:39:54 Solution: indexOf()
0:42:23 Dynamic Arrays
0:46:11 Linked Lists Introduction
0:46:41 What are Linked Lists?
0:51:16 Working with Linked Lists
0:54:40 Exercise: Building a Linked List
0:56:05 Solution: addLast()
1:02:15 Solution: addFirst()
1:04:28 Solution: indexOf()
1:06:23 Solution: contains()
1:07:28 Solution: removeFirst()
1:11:52 Solution: removeLast()

#ComputerScience #Coding #Programming

In this tutorial you will learn php introduction tutorial in Hindi, Urdu.You can learn what is php in hindi and how to use php in web development.

Official Website :
http://www.yahoobaba.net/

PHP Tutorial in Hindi Playlist
https://www.youtube.com/playli....st?list=PL0b6OzIxLPb

Atom Editor
https://atom.io/

VS Code
https://code.visualstudio.com/

Sublime
https://www.sublimetext.com/

Notepad++
https://notepad-plus-plus.org/

PHPStorm
https://www.jetbrains.com/phpstorm/

Follow us on Facebook
https://www.facebook.com/yahooobaba/

Follow us on Twitter
https://twitter.com/YahoooBaba

#php #webdevelopment #webdesign

►Source Code + Text Tutorials - http://codewithharry.com/video....s/php-tutorials-in-h
►This video is a part of this PHP tutorials in Hindi playlist - https://www.youtube.com/playli....st?list=PLu0W_9lII9a
►For Doubt Solving, Brain Storming Sessions & guaranteed replies, join the channel membership here: https://www.youtube.com/channe....l/UCeVMnSShP_Iviwkkn
►Click here to subscribe - https://www.youtube.com/channe....l/UCeVMnSShP_Iviwkkn
►Checkout my English channel here: https://www.youtube.com/ProgrammingWithHarry

Best Hindi Videos For Learning Programming:

►Learn Python In One Video - https://www.youtube.com/watch?v=ihk_Xglr164

►Python Complete Course In Hindi - https://www.youtube.com/playli....st?list=PLu0W_9lII9a

►C Language Complete Course In Hindi -
https://www.youtube.com/playlist?list=PLu0W_9lII9aiXlHcLx-mDH1Qul38wD3aR&disable_polymer=true

►JavaScript Complete Course In Hindi -
https://www.youtube.com/playli....st?list=PLu0W_9lII9a

►Learn JavaScript in One Video - https://www.youtube.com/watch?v=onbBV0uFVpo

►Learn PHP In One Video - https://www.youtube.com/watch?v=xW7ro3lwaCI

►Django Complete Course In Hindi -
https://www.youtube.com/playli....st?list=PLu0W_9lII9a

►Machine Learning Using Python - https://www.youtube.com/playli....st?list=PLu0W_9lII9a

►Creating & Hosting A Website (Tech Blog) Using Python - https://www.youtube.com/playli....st?list=PLu0W_9lII9a

►Advanced Python Tutorials - https://www.youtube.com/playli....st?list=PLu0W_9lII9a

►Object Oriented Programming In Python - https://www.youtube.com/playli....st?list=PLu0W_9lII9a

►Python Data Science and Big Data Tutorials - https://www.youtube.com/playli....st?list=PLu0W_9lII9a

Follow Me On Social Media
►Website (created using Flask) - http://www.codewithharry.com
►Facebook - https://www.facebook.com/CodeWithHarry
►Instagram - https://www.instagram.com/codewithharry/
►Personal Facebook A/c - https://www.facebook.com/geekyharis
Twitter - https://twitter.com/Haris_Is_Here

Source Code: https://github.com/thenewboston-developers
Core Deployment Guide (AWS): https://docs.google.com/docume....nt/d/16NDHWtmwmsnrAC

Learn the fundamentals of Structured Query Language SQL! Even though it's over 40 years old, the world's most popular databases still run on SQL.

Foreign key basics https://docs.microsoft.com/en-....us/sql/relational-da

#dev #database #100SecondsOfCode

Draw SQL Diagrams https://drawsql.app/

Install the quiz app 🤓

iOS https://itunes.apple.com/us/ap....p/fireship/id1462592
Android https://play.google.com/store/....apps/details?id=io.f

Upgrade to Fireship PRO at https://fireship.io/pro
Use code lORhwXd2 for 25% off your first payment.

My VS Code Theme

- Atom One Dark
- vscode-icons
- Fira Code Font

🔥Full Stack Developer (MERN Stack): https://www.simplilearn.com/full-stack-developer-course-mern-certification-training?utm_campaign=xE-CZ379_eg&utm_medium=DescriptionFF&utm_source=youtube

🔥Full Stack Java Developer (Masters): https://www.simplilearn.com/java-full-stack-developer-certification?utm_campaign=PHPEcommerce&utm_medium=Descriptionff&utm_source=youtube
🔥Caltech Coding Bootcamp (US Only): https://www.simplilearn.com/coding-bootcamp?utm_campaign=PHPEcommerce&utm_medium=Descriptionff&utm_source=youtube

This video tutorial on PHP Ecommerce Website will help you understand the basics of building an e-commerce website with the help of PHP, MySQL, HTML, CSS, and Bootstrap. It will guide you step by step on building different web pages of the website, its design, how to upload product details onto the database and retrieve the same to display it on the website.

✅Subscribe to our Channel to learn more about the top Technologies: https://bit.ly/2VT4WtH

⏩ Check out our PHP training videos playlist: https://www.youtube.com/watch?v=KBT2gmAfav4&list=PLEiEAq2VkUUIjP-QLfvICa1TvqTLFvn1b

#PHPECommerce #PHPEcommerceWebsite #HowToCreateECommerceWebsiteUsingPHP #PHPECommerceWebsiteExample #PHPForBeginners #PHPTutorial #PHPTutorialForBeginners #PHP #Simplilearn

Introduction to PHP:
Despite being an old language, PHP still comprises 79.8% of all web applications that nearly translates to 20 million websites and 2 million web servers. According to zdnet.com, the demand for PHP developers has also massively increased to 834% since January 2020. PHP stands for Hypertext Preprocessor. It is an open-source server-side scripting language used for dynamic web development and can be embedded into HTML codes.

➡️ About Post Graduate Program In Full Stack Web Development
This program will give you the foundation for building full-stack web apps using the Java programming language. You'll begin with the basics of JavaScript, and then venture into some of the more advanced concepts like Angular, Spring Boot, Hibernate, JSPs, and MVC. Now is the perfect time to get started on your career as a full-stack web developer!

✅ Key Features
- Caltech CTME Post Graduate Certificate
- Enrolment in Simplilearn’s JobAssist
- Receive up to 25 CEUs from Caltech CTME
- Simplilearn's JobAssist helps you get noticed by top hiring companies
- Attend Masterclasses from Caltech CTME instructors
- Live virtual classes led by industry experts, hands-on projects and integrated labs
- Online Convocation by Caltech CTME Program Director
- 20 lesson-end and 5 phase-end projects
- Capstone Project in 4 domains
- Caltech CTME Circle Membership
- Build your own portfolio on GitHub

✅ Skills Covered
- Agile
- JAVA
- Hibernate and JPA
- Spring Core 50
- DevOps
- HTML5 and CSS3
- AWS
- JavaScript ES6
- Servlets
- SOAP and REST
- JSP


👉 Learn More At: https://www.simplilearn.com/pgp-full-stack-web-development-certification-training-course?utm_campaign=PHPEcommerce&utm_medium=Description&utm_source=youtube

🔥Explore our FREE Courses with Completion Certificate: https://www.simplilearn.com/skillup-free-online-courses?utm_campaign=PHPEcommerce&utm_medium=Description&utm_source=youtube

🔥🔥 Interested in Attending Live Classes? Call Us: IN - 18002127688 / US - +18445327688

Learn how to build custom forums using PHP and MySQL. Forums that are lightweight and integrated right into your custom website. In this part we add a layer of session security to the website as a whole. We do this so nobody can impersonate another member in the discussion boards.

Select Data From MySQL Database | PHP Tutorial | Learn PHP Programming | PHP for Beginners. Today we will learn how to select data from a database table. This is used when we want to fetch data and display it on a website.

➤ GET ACCESS TO MY LESSON MATERIAL HERE!

First of all, thank you for all the support you have given me!

I am really glad to have such an awesome community on my channel. It motivates me to continue creating and uploading content! So thank you!

I am now using Patreon to share improved and updated lesson material, and for a small fee you can access all the material. I have worked hard, and done my best to help you understand what I teach.

I hope you will find it helpful :)

Material for this lesson: https://www.patreon.com/posts/....lesson-material-4236

In this PHP tutorial you will learn how to create a login system in PHP from, and how to show content after being logged in. You will also learn about error handlers, and MySQL databases, which includes how to make a login form and a signup form. If you get any errors during this tutorial, make sure to check out my solutions at the very bottom of this description! :)

➤ LINKS

User Profile Page video (READ FIRST):

I decided that it would be better to create the Profile Page using Object Oriented PHP (OOP), instead of Procedural PHP. 🙂

OOP is MUCH better for creating BIG systems in PHP, and is more organized and considered the "proper way" of writing PHP.

I have a OOP Login System tutorial that I will link bellow, that I recommend you watch after this one. 🙂 And I will also link my OOP PHP course in case you are completely new to OOP PHP. 😉

Even though you can still follow along on the OOP Profile System video right after THIS Procedural Login System tutorial, I strongly recommend that you watch the OOP Login System first... Since it will be easier to follow along. 🙂

OOP PHP Course: https://www.youtube.com/watch?v=Anz0ArcQ5kI&list=PL0eyrZgxdwhypQiZnYXM7z7-OTkcMgGPh&ab_channel=DaniKrossing
OOP Login System tutorial: https://www.youtube.com/watch?v=BaEm2Qv14oU&ab_channel=DaniKrossing
OOP Profile Page tutorial: https://www.youtube.com/watch?v=SfE_bXFQmCU&ab_channel=DaniKrossing

Install XAMPP & a local server: https://www.youtube.com/watch?v=mXdpCRgR-xE
Regular expressions (search patterns): https://www.youtube.com/watch?v=In5NBIRfMrQ
PHP Password Recovery System: https://www.youtube.com/watch?v=wUkKCMEYj9M

➤ CHAPTERS

00:00:00 - Introduction
00:01:16 - How to get my lesson files
00:02:11 - What will you learn in this video?
00:02:48 - What security will we use?
00:03:41 - It's Procedural PHP, not OOP PHP
00:04:14 - If you get a error along the way...
00:04:48 - A demonstration of what we will make
00:08:20 - What YOU should have ready before we start!
00:12:52 - Creating our Header and Index pages
00:15:57 - Creating our Signup and Login pages
00:26:43 - Creating a connection to our database
00:33:16 - Creating our database
00:42:23 - Creating our Signup script
00:58:23 - Creating our Signup functions
00:58:23 - Testing our Signup system
01:24:46 - Creating Signup page error messages
01:26:47 - Creating our Login script
01:36:35 - Creating our Login functions
01:46:22 - Creating Login page error messages
01:47:47 - Changing our website when user is logged in
01:51:19- Testing our Login system
01:52:20 - Creating our Logout script
01:54:12 - Creating a welcome message when logged in
01:54:44 - Outro

➤ GET ACCESS TO MY LESSON MATERIAL HERE!

First of all, thank you for all the support you have given me!

I am really glad to have such an awesome community on my channel. It motivates me to continue creating and uploading content! So thank you!

I am now using Patreon to share improved and updated lesson material, and for a small fee you can access all the material. I have worked hard, and done my best to help you understand what I teach.

I hope you will find it helpful :)

Material for this lesson: https://www.patreon.com/posts/....lesson-material-4236

➤ ERRORS YOU MIGHT RUN INTO!!!

▸"signup=empty"
Make sure you wrote "mysqli_connect" and NOT "mysql_connect" in the dbh.inc.php file!

▸"unexpected }"
If you get this error message:
Parse error: syntax error, unexpected '}'
Then it is because you forgot to close a ) or ; somewhere.

▸"unexpected ;"
If you get this error message:
Parse error: syntax error, unexpected ';'
Then it is because you forgot to close a } or ) somewhere. Probably because you made a mistake with your parenthesis near the "empty()" functions in your signup script.

▸"hashed pwd error"
If you get an error in the script when you hash the password, then it is because you decided not to follow my steps exactly in the video when I created the database table. Make sure you DON'T set the varchar() to a lower value! When you hash the password it will take up a lot of space in this column, and if you set a lower number then it won't fit!

▸"signup=success but database is empty?"
Here there might be a few reasons for your error. 1st is that you made a syntax/spelling mistake in your code. And yes you will claim that your code is identical to mine, but in 90% of the cases people claim this, I still find a syntax error in their code. So check your code for errors!
2nd reason is that MAMP seems to cause a lot of issues for people. Therefore try using XAMPP and make sure you write the same as me in the dbh.inc.php file.
3nd reason might be because you didn't follow the tutorial 100% when we set up the database at the beginning.

▸"HTTP ERROR 500"
HTTP ERROR 500 is a server error, meaning that you are most likely using an outdated version of apache or mysql. Try updating your servers and make sure that you are using the latest version of PHP.