Harvard CS50 (2023) – Full Computer Science University Course

27 thoughts on “Harvard CS50 (2023) – Full Computer Science University Course”

• how to use cs50 library locally i tried different tutorials as well as followed different documents
  but none worked

• excellent… inspirational… heartwarming… amazing… intelligent… best CS lecture in history

• 49:43

• best teacher ever…David Malan Sir!!!
  wish I watched this course in my 10th Grade or before

• 7:33:55

• The man is the Teacher 😮🎉❤

• hey sleepy Joe, thanks for the loud crying emoji

• I think David has spoken more words in this long course than I have in all my life. It's really a great lecture though and I feel like it helps me a lot to understand coding and computer science which I am grateful for.

• Day one 3:00:00
  Day two 4:14:04

• // copied this comment for it to appear on top. Thanks to @jaimediez

  Key Takeaways for quick navigation:

  00:00 Introduction to the CS50 course and Dr. David Malan's background
  
  07:12 Transition to the C programming language in Week One
  
  18:09 Exploring Different Number Systems
  
  24:29 Introducing Volunteers to Represent Bits
  
  31:10 Bits and Bytes in Computer Memory
  
  36:01 Decoding Text Messages Using ASCII
  
  43:59 Representation of Emojis and Skin Tones in Unicode
  
  46:04 Efficient Design in Unicode for Complex Emoji Representations
  
  01:17:00 Scratch Interface and Basics
  
  01:25:20 Exploring Scratch Features
  
  01:39:04 Interactive Programming with Video Sensing
  
  Introduction to using Scratch for programming.
  
  Creating a program with synthesized speech.
  
  Explaining the concept of functions in programming.
  
  Implementing conditional behavior in Scratch.
  
  01:53:18 Iterative Development in Scratch
  
  01:57:46 Introduction to Programming Paradigm
  
  02:03:54 More Complex Game Elements
  
  02:08:11 Evaluating Code Quality
  
  02:14:56 Structure of a Code Editor
  
  02:25:12 Transition from Scratch to C
  
  03:02:01 Simplifying Conditional Logic
  
  03:07:08 Exploring the structure of C code.*
  
  03:09:30 Handling multiple conditions using "else if."*
  
  03:10:28 Handling a catch-all condition.*
  
  03:11:36 Recap and review of C code.*
  
  03:14:09 Code optimization by eliminating redundancy.*
  
  03:14:25 Recap of coding concepts.*
  
  03:14:34 Addressing questions and clarifications.*
  
  03:50:56 Break and Introduction to Mario ASCII Art
  
  03:53:54 Printing a Column of Bricks
  
  03:55:18 Printing a 3×3 Grid of Bricks
  
  03:56:01 Discussing the idea of printing rows of bricks in a grid format.
  
  04:14:29 Creating Functions with Inputs
  
  04:49:23 Troubleshooting an error with get_string function,
  
  05:21:57 Debugging with Breakpoints
  
  05:22:25 Debugging in CS50,
  
  05:26:46 Rubber Duck Debugging,
  
  05:55:23 Introduction to arrays and for loops
  
  06:15:15 Manipulating Strings in C
  
  06:30:50 Introduction to converting characters to uppercase in C
  
  06:35:12 Leveraging the ctype.h library for character manipulation
  
  06:42:34 Command-line arguments in C programs
  
  06:48:22 More fun with command-line arguments: Changing the "cow" to a "duck"
  
  06:49:21 Exit Status and Error Codes
  
  06:50:29 The Role of "int" in "main"
  
  07:24 Understanding Algorithm Efficiency
  
  07:41:42 Introduction to creating a phone book in C
  
  07:43:33 Introducing the concept of a custom data type
  
  07:59:00 Sorting Algorithms Introduction
  
  08:08:00 Bubble Sort
  
  08:18:10 Bubble Sort Analysis
  
  08:27:04 Recursion and Recursive Functions
  
  08:57:04 Time Complexity of Merge Sort
  
  09:07:51 Introduction to Hexadecimal and Base 16
  
  09:10:19 Understanding Hexadecimal Representation
  
  09:19:54 Getting the Address of a Variable
  
  09:44:01 Introduction to Data Types and Strings in C
  
  10:03:55 Harnessing Pointer Arithmetic with Strings
  
  10:17:37 Exploring string manipulation
  
  10:19:27 Copying strings and memory allocation
  
  10:47:25 Handling Garbage Values
  
  11:09:12 Swapping values using pointers in C,
  
  11:13:00 Memory limitations and potential issues in C,
  
  11:27:18 Importance of Data Structures
  
  12:24:03 Adding Elements to Linked List
  
  12:34:00 Explanation of implementing a stack using linked lists,
  
  12:44:00 Iterating over the linked list,
  
  12:51:00 In this section, the main focus is on understanding the running time of various operations in linked lists.
  
  12:56:00 This section introduces the concept of binary search trees (BSTs) as a way to achieve both binary search and dynamism.
  
  13:12:24 Balanced binary search trees and algorithm complexity
  
  13:18:06 Hashing and hash functions
  
  13:24:38 Understanding Hash Tables and Memory Usage
  
  13:41:41 Introduction to Python
  
  13:56:53 Data Types in Python
  
  13:59:54 Implementing Spell Checker in Python
  
  14:11:12 Face Recognition in Python
  
  14:19:13 Variable manipulation and loops in Python
  
  14:26:53 No need for a main function in Python
  
  14:33:41 Integer overflow and big numbers in Python
  
  15:11:18 Python Printing Techniques
  
  15:26:12 Python: Accessing Command Line Arguments
  
  15:41:10 Introduction to Python Dictionaries and Their Use Cases
  
  15:43:28 Swapping Values in Python
  
  15:47:12 Working with CSV Files in Python
  
  15:54:27 Text-to-Speech Synthesis in Python
  
  15:57:36 Conclusion and Introduction to SQL
  
  16:19:33 Improved Language Counting
  
  16:26:29 Sorting Data
  
  16:30:13 Interactive User Input
  
  16:34:40 Introduction to Relational Databases
  
  16:36:06 Basic SQL Operations
  
  16:51:30 Introduction to SQL in Python
  
  17:08:10 Database Design Considerations
  
  17:11:42 Primary Keys and Foreign Keys
  
  17:26:27 Querying Relationships
  
  17:32:59 Joining Multiple Tables
  
  17:43:37 Fuzzy Matching in SQL
  
  17:45:03 Creating a database index for faster searches
  
  18:01:29 Introduction to the use of placeholders in SQL queries
  
  18:05:13 Preventing SQL injection attacks
  
  18:22:31 Understanding the Basics of TCP/IP
  
  18:44:25 HTTP as an Application-Level Protocol
  
  18:54:06 Viewing HTTP Request Headers
  
  19:05:27 Prank at Harvard-Yale Football Game
  
  19:10:45 Introduction to HTML and Web Technologies
  
  19:14:39 Running a Web Server with http-server
  
  19:15:36 Accessing the Hosted Website
  
  19:16:46 Understanding URL Structure
  
  19:17:39 HTML Tag Hierarchy
  
  19:21:48 HTML Elements and Hierarchy
  
  19:31:07 Introduction to HTML Tags
  
  19:32:29 Creating Lists in HTML
  
  19:47:43 HTML Meta Tags
  
  20:22:12 Introduction to JavaScript
  
  20:23:35 JavaScript Variables
  
  20:25:14 JavaScript in Web Development
  
  20:25:56 Client-Side JavaScript
  
  20:27:07 HTML Form Creation
  
  20:29:56 Optimizing JavaScript Code
  
  20:45:47 Dynamic table sorting with JavaScript
  
  20:49:10 Changing background color with JavaScript
  
  21:02:19 Folder Structure for Web Applications
  
  21:17:15 Handling user input via URL parameters:
  
  21:35 Using Templates and Layouts
  
  21:48 Flask Web Development Basics
  
  22:03 Template Layouts in Flask
  
  22:07:18 Storing user registration data in a dictionary
  
  22:10:18 Displaying user registrations on a webpage
  
  22:34:55 Displaying Registered Users
  
  23:36:23 Overview of Computer Science Course
  
  23:51:38 Preparing for Post-CS50
  
  23:55:51 Introduction to Review Session
  
  23:56:19 Python "Hello World" Question
  
  23:57:05 DNS (Domain Name System) Question
  
  23:58:00 Merge Sort Runtime Question
  
  23:59:08 ARG C in C Programming Question
  
  24:00:19 File Opening Function in C Question
  
  24:08:45 Valid Way to Print Exclamation Point Question
  
  24:10:23 Compiling Steps Question
  
  24:11:02 Surprise at the Beginning of the Halloween Lecture Question
  
  24:13:20 Unicode and Emoji Introduction
  
  24:14:28 Representation of Japanese Foods in Emoji
  
  24:16:06 Universal Appeal of Dumplings Discussion
  
  24:17:00 Introduction to Jennifer 8 Lee's Talk
  
  24:20:33 Evolution of Emoji Discussion
  
  24:22:13 Unicode Consortium and Emoji
  
  24:25:20 Representation of Food in Emoji
  
  24:27:17 Importance of Inclusivity in Emoji
  
  24:37:32 Introduction to the Next Section
  
  24:39:20 Memory Hierarchy
  
  24:40:25 Storage Devices
  
  24:41:31 CPU Clock Speed
  
  24:45:15 System Architecture Quiz
  
  24:48:33 Algorithm Efficiency
  
  24:56:00 Recommended Books
  
  24:57:52 Farewell and Good Luck
  
  23:58:00 Merge Sort Algorithm Analysis
  
  24:00:19 The Duck Debugger
  
  24:03:00 How Strings Length is Computed in C
  
  24:10:09 Arrow Operator in C
  
  24:12:54 Missing Dumpling Emoji
  
  24:16:21 Involvement with Unicode Consortium
  
  24:29:02 Encoding Characters and Code Points
  
  24:33:07 Depiction of Race and Nationality in Emoji
  
  24:33:35 Evolution of Emoji Design
  
  24:36:30 Contributions to Emoji
  
  24:53:46 Emoji Directionality
  
  24:55:36 Future of Emojis
  
  25:03:07 Course Conclusion
  
  25:09:54 Password Choices
  
  25:10:23 Password Security
  
  25:12:26 Cracking a 4-Digit Passcode
  
  25:28:22 Lockout Mechanism

• Completed 25% of Week 7 SQL

• This is really awesome. I am using Chat GPT to dig deeper or get stuff that I missed.

• One more video before bed
  The vide:

• 3:21:00

• Sir mera bas placment ho jaee meri mumma bahut khush hogi and good wishes degi apko

• He is magician… i want to be a teacher like him… Amazing

• Yeah the quality of education is actually drastic between a normal quickie uni and an ivy uni

• I have never taken a programming language or class before and i plan to study CS in college, can i watch this video?

• I can tell you where he got this video

• can someone tell me how long is this video

• Day 2: 1:45:00

• I don't know why but his dangling wristband is giving some creepy vibes.

• Yooo, thought Harvard will speak about CS GO, but here some IT things

• 08:10:35 nnnn yeah 😂😂😂😂

• Doctor: You have 24 hours to live.
  Me:

• I thought that was Big Johnny Cox

• Day 1 41:20

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