Harvard CS50 – Full Computer Science University Course

47 thoughts on “Harvard CS50 – Full Computer Science University Course”

• 17:00

• 12:05

• 54:54

• 27:14

• This is fantastic Stuff!!!❤️💡

• 🗿

• I am getting suffocated ,seing this guy in mask 😷..

• 43:29

• 3:50:36

• (00:00:00) Lecture 0 – Scratch

  (00:00:00) Introduction to Scratch
  
  (00:10:32) Basic Scratch commands and blocks
  
  (00:25:45) Using variables in Scratch
  
  (00:45:12) Conditional statements and loops in Scratch
  
  (01:15:20) Creating simple games in Scratch
  
  (01:45:08) Lecture 1 – C

  (01:45:08) Introduction to C programming language
  
  (02:10:22) Syntax and basic data types in C
  
  (02:35:57) Control structures in C
  
  (02:55:43) Arrays and strings in C
  
  (04:13:23) Lecture 2 – Arrays

  (04:13:23) Introduction to arrays
  
  (04:25:10) One-dimensional arrays and operations
  
  (04:43:58) Multidimensional arrays and matrix operations
  
  (06:20:43) Lecture 3 – Algorithms

  (06:20:43) Introduction to algorithms
  
  (06:30:15) Searching algorithms (linear and binary search)
  
  (06:45:02) Sorting algorithms (selection, insertion, bubble, merge, quicksort)
  
  (08:37:55) Lecture 4 – Memory

  (08:37:55) Introduction to computer memory
  
  (08:48:20) Memory hierarchy and cache
  
  (09:02:10) Pointers and dynamic memory allocation
  
  (11:03:17) Lecture 5 – Data Structures

  (11:03:17) Introduction to data structures
  
  (11:15:40) Stacks and queues
  
  (11:30:05) Linked lists
  
  (11:47:55) Trees and binary search trees
  
  (13:15:36) Lecture 6 – Python

  (13:15:36) Introduction to Python programming language
  
  (13:28:10) Python syntax and basic data types
  
  (13:40:48) Control structures and loops in Python
  
  (13:58:21) File handling and modules in Python
  
  (15:39:25) Lecture 7 – SQL

  (15:39:25) Introduction to SQL and relational databases
  
  (15:52:10) Basic SQL queries (SELECT, INSERT, UPDATE, DELETE)
  
  (16:05:45) Joins and subqueries in SQL
  
  (18:00:55) Lecture 8 – HTML, CSS, JavaScript

  (18:00:55) Introduction to web development technologies
  
  (18:12:40) HTML structure and tags
  
  (18:25:15) CSS styling and selectors
  
  (18:38:50) JavaScript basics and DOM manipulation
  
  (20:23:38) Lecture 9 – Flask

  (20:23:38) Introduction to Flask web framework
  
  (20:35:55) Routing and rendering templates with Flask
  
  (20:48:20) Handling forms and user input in Flask
  
  (22:39:01) Lecture 10 – Emoji

  (22:39:01) Introduction to emoji encoding and representation
  
  (22:50:15) Using emojis in text-based applications
  
  (24:02:50) Cybersecurity

  (24:02:50) Introduction to cybersecurity concepts and threats
  
  (24:15:30) Network security and encryption techniques

• 1:31:46 day 1
  2:39:10 day 2
  2:48:54 day 2
  3:41:00 day 2
  5:00:00 day 3
  5:32:00 day 3
  6:22:22 day 4

• The stage lamps are binary. They have messages encoded in ASCII. I noticed this and haven't seen anyone in the comments point it out and feel proud of myself lmao.

• why did he wear musk..

• 1:41 lesson 0

• 45:00

• This is the best course I’ve ever had in my entire life❤🎉

• The lamps say "HI MOM" so cool of them to add that , makes learning fun.

• Day 1: 30:27 personal mark
  Day 2: 1:06:09

• tation of problem set 5
  
  13:53:30 Python is better for programmers because it is faster to write, while C is better for the computer because it is faster to run.
  
  14:03:15 Python code does not require a main function
  
  14:08:03 Convert user input to integer in Python using the int function
  
  14:18:25 Implement agreement program in Python with fewer lines of code.
  
  14:23:24 Handle multiple inputs for 'yes' in Python code.
  
  14:33:17 Python simplifies variable declaration and memory management
  
  14:38:28 Recreate C's do-while loop in Python using an infinite loop with a break statement
  
  14:48:31 Override new line character to print multiple outputs on the same line
  
  14:53:41 Learn to search for Python functions using the official documentation or Google and Stack Overflow.
  
  15:02:59 Create a program to uppercase a string input
  
  15:08:09 Implementing algorithms in Python such as binary search
  
  15:18:25 Implementing a phone book with CSV files
  
  15:24:10 Process Hogwarts form data into a dictionary using Python's CSV library
  
  15:34:04 Python program to detect faces and generate a QR code
  
  15:39:22 Learn how to store and persist data in files using Python
  
  15:49:49 Iterate over CSV file and filter out duplicates based on titles.
  
  05:00 Filter and standardize user input titles using Python
  
  16:04:55 Create a counter for titles and their counts in a dictionary.
  
  16:10:16 Python's sorted function can take a key parameter to determine what to sort by.
  
  16:20:26 Regular expressions can be used to express patterns in a standardized way in Python and other programming languages
  
  16:25:39 CSV is a flat file database, while relational databases are like spreadsheet programs that programmers can interact with using SQL.
  
  16:35:39 SQL can distill multiple lines of code into a simple select statement.
  
  16:40:46 SQL allows for filtering and manipulation of data using commands like 'select', 'where', and 'update'.
  
  16:52:15 Separate genres and shows into two tables to avoid complications with like keyword.
  
  00:53 Created two tables, shows and genres, with a one-to-many relationship between them
  
  17:08:10 Program to search for number of people who liked a show in favorites.db
  
  17:13:24 Combined SQL and Python to simplify searching and selecting data
  
  17:23:45 Relational databases use foreign keys to align tables with common data.
  
  17:28:52 Creating an index in a database allows for faster data retrieval using data structures like a B-tree.
  
  17:39:16 Join data from multiple tables using foreign keys and primary keys
  
  17:44:08 Using special syntax in SQL and not defending against adversarial attacks can lead to SQL injection attacks.
  
  17:54:27 Non-Atomic code execution can cause problems when multiple users interact with a server simultaneously
  
  17:59:17 Introduction to web programming with HTML, CSS, and JavaScript.
  
  18:10:10 TCP and IP are protocols that standardize communication on the internet.
  
  18:15:14 TCP/IP protocol ensures guaranteed delivery of data
  
  18:25:14 Understanding the structure of server requests and responses
  
  18:30:10 Visiting a website involves many HTTP requests and responses.
  
  18:41:20 Learn HTML and CSS to create the structure and aesthetics of a webpage.
  
  18:47:24 Created a web page in HTML and opened a web server on TCP port 8080.
  
  18:57:09 Learn HTML tags like P, H1, UL, and OL for better organization and readability
  
  19:02:04 Learned how to layout tabular data with HTML.
  
  19:11:49 Learned how to create links and make a website responsive
  
  19:16:52 Use meta tag 'viewport' to improve website responsiveness on mobile devices
  
  19:26:56 A simple web page with three main sections
  
  19:32:13 CSS supports inheritance, allowing child elements to inherit properties from their parents or ancestors.
  
  19:42:23 You can use developer tools to quickly edit and experiment with HTML and CSS on any website.
  
  19:47:16 CSS selectors and properties can be used to manipulate the aesthetics of a web page.
  
  19:56:45 Using Bootstrap can make websites much prettier and user-friendly with minimal coding.
  
  20:01:57 Implemented a Google-like search page using Bootstrap
  
  20:11:27 Add JavaScript code to greet the user when the form is submitted.
  
  20:16:22 Add event listeners to listen for events in web programming.
  
  20:27:13 Flask is a Python framework that simplifies web app development.
  
  20:31:42 Create a simple web app using Flask
  
  20:41:28 Enhance the Hello app to get input from the user using a form tag
  
  20:46:42 Form submission leads to internal server error
  
  20:57:30 Flask allows to factor out commonalities in templating
  
  21:02:54 Web programming using Flask
  
  21:13:18 Creating a web application using Flask
  
  01:22 User registration form created
  
  21:28:39 Missing name in HTML form caused registration failure
  
  21:34:05 Improved user interface for registering sports
  
  21:44:21 Implementing a database using SQL Lite is better than using a dictionary for storing information.
  
  21:49:43 Programmatically generate a list of dictionaries from a SQL database and render it in an HTML table.
  
  22:00:30 Implement sessions to log users in and keep them logged in.
  
  22:05:55 HTTP can be made stateful using cookies.
  
  22:15:58 Flask uses sessions to remember user data and streamline website functionality.
  
  22:21:22 Consolidate shopping cart functionality in a single route using GET and POST requests
  
  22:31:37 Use JSON format for more efficient data transfer between client and server
  
  22:36:43 JavaScript's Json function parses data into dictionaries and can be used to create dynamic HTML.
  
  22:48:06 Learn computational thinking and critical thinking to produce correct output
  
  01:16 Drawing a cube can be challenging due to the tension between abstraction and communication
  
  23:03:15 Transition from Cloud to client-side programming and explore hosting options
  
  23:07:56 Summary of a quiz show on coding concepts
  
  23:18:55 Bee Trees vs Binary Trees
  
  23:25:12 Representation of human languages through emojis
  
  23:35:09 Dumpling emoji proposal accepted
  
  23:40:25 Unicode controls Emoji, which took three years to unify and get onto devices.
  
  23:50:40 Gender diversity in Emoji Land
  
  02:20 New Emoji have been added to the keyboard, including more hearts, bird things, ginger, wireless, and holding hand fan.
  
  24:06:55 Phone security is a concern for many users
  
  01:33 The security of a four-digit passcode is questionable
  
  24:21:04 Using longer and more complex passcodes raises the bar for hackers
  
  24:25:37 Use a password with letters, numbers, and punctuation for increased security.
  
  24:35:14 Use a password manager to generate and manage unique passwords for each website.
  
  24:40:09 Google's confidential mode and incognito mode may not provide complete security.
  
  24:50:03 Use two-factor authentication and end-to-end encryption for more security.

• tation of problem set 5
  
  13:53:30 Python is better for programmers because it is faster to write, while C is better for the computer because it is faster to run.
  
  14:03:15 Python code does not require a main function
  
  14:08:03 Convert user input to integer in Python using the int function
  
  14:18:25 Implement agreement program in Python with fewer lines of code.
  
  14:23:24 Handle multiple inputs for 'yes' in Python code.
  
  14:33:17 Python simplifies variable declaration and memory management
  
  14:38:28 Recreate C's do-while loop in Python using an infinite loop with a break statement
  
  14:48:31 Override new line character to print multiple outputs on the same line
  
  14:53:41 Learn to search for Python functions using the official documentation or Google and Stack Overflow.
  
  15:02:59 Create a program to uppercase a string input
  
  15:08:09 Implementing algorithms in Python such as binary search
  
  15:18:25 Implementing a phone book with CSV files
  
  15:24:10 Process Hogwarts form data into a dictionary using Python's CSV library
  
  15:34:04 Python program to detect faces and generate a QR code
  
  15:39:22 Learn how to store and persist data in files using Python
  
  15:49:49 Iterate over CSV file and filter out duplicates based on titles.
  
  05:00 Filter and standardize user input titles using Python
  
  16:04:55 Create a counter for titles and their counts in a dictionary.
  
  16:10:16 Python's sorted function can take a key parameter to determine what to sort by.
  
  16:20:26 Regular expressions can be used to express patterns in a standardized way in Python and other programming languages
  
  16:25:39 CSV is a flat file database, while relational databases are like spreadsheet programs that programmers can interact with using SQL.
  
  16:35:39 SQL can distill multiple lines of code into a simple select statement.
  
  16:40:46 SQL allows for filtering and manipulation of data using commands like 'select', 'where', and 'update'.
  
  16:52:15 Separate genres and shows into two tables to avoid complications with like keyword.
  
  00:53 Created two tables, shows and genres, with a one-to-many relationship between them
  
  17:08:10 Program to search for number of people who liked a show in favorites.db
  
  17:13:24 Combined SQL and Python to simplify searching and selecting data
  
  17:23:45 Relational databases use foreign keys to align tables with common data.
  
  17:28:52 Creating an index in a database allows for faster data retrieval using data structures like a B-tree.
  
  17:39:16 Join data from multiple tables using foreign keys and primary keys
  
  17:44:08 Using special syntax in SQL and not defending against adversarial attacks can lead to SQL injection attacks.
  
  17:54:27 Non-Atomic code execution can cause problems when multiple users interact with a server simultaneously
  
  17:59:17 Introduction to web programming with HTML, CSS, and JavaScript.
  
  18:10:10 TCP and IP are protocols that standardize communication on the internet.
  
  18:15:14 TCP/IP protocol ensures guaranteed delivery of data
  
  18:25:14 Understanding the structure of server requests and responses
  
  18:30:10 Visiting a website involves many HTTP requests and responses.
  
  18:41:20 Learn HTML and CSS to create the structure and aesthetics of a webpage.
  
  18:47:24 Created a web page in HTML and opened a web server on TCP port 8080.
  
  18:57:09 Learn HTML tags like P, H1, UL, and OL for better organization and readability
  
  19:02:04 Learned how to layout tabular data with HTML.
  
  19:11:49 Learned how to create links and make a website responsive
  
  19:16:52 Use meta tag 'viewport' to improve website responsiveness on mobile devices
  
  19:26:56 A simple web page with three main sections
  
  19:32:13 CSS supports inheritance, allowing child elements to inherit properties from their parents or ancestors.
  
  19:42:23 You can use developer tools to quickly edit and experiment with HTML and CSS on any website.
  
  19:47:16 CSS selectors and properties can be used to manipulate the aesthetics of a web page.
  
  19:56:45 Using Bootstrap can make websites much prettier and user-friendly with minimal coding.
  
  20:01:57 Implemented a Google-like search page using Bootstrap
  
  20:11:27 Add JavaScript code to greet the user when the form is submitted.
  
  20:16:22 Add event listeners to listen for events in web programming.
  
  20:27:13 Flask is a Python framework that simplifies web app development.
  
  20:31:42 Create a simple web app using Flask
  
  20:41:28 Enhance the Hello app to get input from the user using a form tag
  
  20:46:42 Form submission leads to internal server error
  
  20:57:30 Flask allows to factor out commonalities in templating
  
  21:02:54 Web programming using Flask
  
  21:13:18 Creating a web application using Flask
  
  01:22 User registration form created
  
  21:28:39 Missing name in HTML form caused registration failure
  
  21:34:05 Improved user interface for registering sports
  
  21:44:21 Implementing a database using SQL Lite is better than using a dictionary for storing information.
  
  21:49:43 Programmatically generate a list of dictionaries from a SQL database and render it in an HTML table.
  
  22:00:30 Implement sessions to log users in and keep them logged in.
  
  22:05:55 HTTP can be made stateful using cookies.
  
  22:15:58 Flask uses sessions to remember user data and streamline website functionality.
  
  22:21:22 Consolidate shopping cart functionality in a single route using GET and POST requests
  
  22:31:37 Use JSON format for more efficient data transfer between client and server
  
  22:36:43 JavaScript's Json function parses data into dictionaries and can be used to create dynamic HTML.
  
  22:48:06 Learn computational thinking and critical thinking to produce correct output
  
  01:16 Drawing a cube can be challenging due to the tension between abstraction and communication
  
  23:03:15 Transition from Cloud to client-side programming and explore hosting options
  
  23:07:56 Summary of a quiz show on coding concepts
  
  23:18:55 Bee Trees vs Binary Trees
  
  23:25:12 Representation of human languages through emojis
  
  23:35:09 Dumpling emoji proposal accepted
  
  23:40:25 Unicode controls Emoji, which took three years to unify and get onto devices.
  
  23:50:40 Gender diversity in Emoji Land
  
  02:20 New Emoji have been added to the keyboard, including more hearts, bird things, ginger, wireless, and holding hand fan.
  
  24:06:55 Phone security is a concern for many users
  
  01:33 The security of a four-digit passcode is questionable
  
  24:21:04 Using longer and more complex passcodes raises the bar for hackers
  
  24:25:37 Use a password with letters, numbers, and punctuation for increased security.
  
  24:35:14 Use a password manager to generate and manage unique passwords for each website.
  
  24:40:09 Google's confidential mode and incognito mode may not provide complete security.
  
  24:50:03 Use two-factor authentication and end-to-end encryption for more security.

• 00:00 Learn computer science and programming with Harvard's CS50 course
  06:50 Computers count using binary system of zeros and ones
  18:08 Unicode allows for representation of all human languages and emojis with standardized patterns of zeros and ones.
  23:22 Computers represent colors using RGB values.
  35:13 Algorithm: Divide and conquer to efficiently search for information
  40:27 Efficiency of algorithms is about using intuition and programming languages to solve problems more quickly.
  50:49 Learn programming fundamentals using Scratch
  00:53 Introduction to Scratch programming
  1:06:02 Programming concepts such as inputs, outputs, and puzzle pieces can be recognized and applied easily
  1:11:08 Creating custom blocks in Scratch allows for better code design and abstraction.
  1:21:25 Assembling basic building blocks can bring programs to life.
  1:26:47 Making progress with implementing game mechanics
  1:37:04 Learned about implementing game mechanics
  1:42:24 Learned programming with C language in week one of CS50 course
  1:55:03 Programming environment and terminal window in VS code
  2:00:06 Compile source code into machine code and run it using the command line interface
  2:10:19 The get string function in C returns a value that can be used and reused.
  2:15:25 Implementing interactive programs with printf and scanf
  2:26:02 VS Code's syntax highlighting feature helps programmers focus by highlighting different types of code in different colors.
  00:03 C programming requires the use of header files to include libraries and define functions
  2:41:38 Command line basics and C data types
  2:47:01 Creating a simple calculator in C
  2:57:27 Limitations of 32-bit integers in programming
  3:02:58 Introduction to Conditionals in C programming
  3:13:46 Learned about remainder operator and equality operator in C programming language.
  3:19:09 Using while loops to repeat actions indefinitely in C
  3:29:20 For and while loops can be used to do the same thing.
  3:34:50 Declaring functions in C99
  00:15 Create a semi-graphical map in C by printing ASCII art
  3:50:33 Create a dynamic program that prints a square of bricks using nested loops.
  4:01:12 Floating point precision in computing
  4:06:32 The 2038 problem may cause computers to think it's 1901
  4:18:03 Enhancing the program to include cs50.h requires additional linking
  4:23:13 Compiling C code involves four automatic steps: pre-processing, compiling, assembling and linking.
  4:33:22 Compiling is a process of converting source code to machine code.
  4:38:30 Use printf for debugging and diagnosing problems in code
  4:48:48 Debugging with step into and step over
  4:54:07 Learn about data types and memory in C programming.
  5:04:31 Arrays allow you to store multiple values of the same type.
  5:10:01 Arrays can store multiple values and eliminate the need for multiple variable names
  5:21:13 Strings in computer memory are essentially arrays of characters, and a null character is used to separate one string from another.
  5:26:36 Standardizing null termination for strings
  5:37:47 CS50's manual pages provide beginner-friendly documentation for frequently used functions in C
  5:43:06 Printing a string without using percent s
  5:53:53 Use the two upper function to make characters uppercase in C
  5:59:31 C programs can take command line arguments using int main(int argc, string argv[])
  03:46 Returning a non-zero value from Main indicates an error in the program.
  6:15:54 Text analysis and cryptography discussed.
  6:27:22 Efficiency of algorithms is measured in terms of their running time, often described using Big O notation.
  6:32:36 New vocabulary for describing running time of algorithm.
  6:43:24 Linear search algorithm has a Big O of N and Omega of 1
  6:48:42 Binary search is more efficient than linear search
  6:59:15 Sorting data before searching may or may not be worth it depending on the use case
  7:04:20 Search for a string in an array of strings using strcmp
  7:15:17 Implemented a phonebook using arrays but it is not well designed.
  7:20:28 Define custom data types in C using typedef and struct
  7:31:17 Sorting unsorted input is a problem we need to solve.
  06:31 Sorting an array using the smallest number first
  00:03 The discussed algorithm is selection sort with a running time of O(n^2).
  7:52:04 Selection sort and bubble sort are both Big O of N squared
  8:02:45 Sorting algorithms can be fundamentally faster than comparison sorts using recursion.
  8:07:24 Recursion is a programming technique where a function calls itself to solve smaller puzzles at hand.
  8:17:52 Implementing a draw function using recursion
  8:23:12 Merge sort algorithm explained
  8:33:40 Merge Sort has a better running time than Bubble Sort for unsorted data
  8:41:16 Learn about hexadecimal notation for colors in images
  8:51:25 Hexadecimal is a convenient way of representing data in units of four bits
  8:56:40 Pointers store the address of a value in memory
  9:08:00 Pointers and addresses in computer memory
  9:13:28 Pointers are addresses used to store information in memory.
  9:24:43 Exploring memory addresses in C
  9:30:29 Strings are stored as Char Stars in C.
  9:41:21 Demonstration of pointer arithmetic in C
  03:16 An array can be treated as the address of the first element without a backslash zero.
  9:57:26 Copying a pointer only copies the memory address
  10:02:51 Use malloc and free functions to allocate and free memory
  10:13:32 Using malloc and stir copy to copy strings
  10:19:18 Understanding pointers and memory management
  10:29:43 Understanding pointers and memory allocation in C
  10:35:00 Passing copies of values to a function creates problems in C
  10:45:20 Pass in addresses instead of copies to swap values in C using pointers.
  10:50:49 User input via scanf and storing using pointers can be dangerous
  11:01:10 Introduction to data structures in computer memory
  11:07:18 Copying an array to insert a new number is a sub-optimal solution
  11:17:02 Dynamically allocating memory can lead to orphaning the original chunk of memory
  11:22:26 Use realloc to resize arrays in C
  11:33:19 Linked lists allow efficient use of memory by using pointers.
  11:38:13 Creating linked lists with nodes in C
  11:48:19 Initialized a new node with integer and null pointer
  11:53:22 Code to build a linked list using a new primitive
  12:04:01 Iterating through a linked list using a for loop
  12:09:20 Using star notation and arrow notation to free linked lists
  12:19:09 Linked lists require linear search for finding an element
  12:24:16 Using a binary search tree can retain the power of binary search while allowing dynamic memory allocation.
  12:33:55 Implementation of a binary search tree in C
  12:38:58 Recursion is elegant and works well with data structures like binary search trees.
  12:49:04 A hash table is an array whose elements are linked lists.
  12:53:56 Hashing can be used to sort data into distinct buckets for easier processing.
  13:04:01 A trie allows for constant time lookup
  13:08:54 Different data structures should be used based on the situation
  13:19:14 Python has simpler syntax for printing and declaring variables compared to C
  13:23:59 Python syntax is simpler than C syntax.
  13:33:55 Python has built-in data types and libraries for common tasks
  13:38:37 Python is an interpreted language, making it easier to use and learn with fewer lines of code and many libraries available.
  13:48:36 Python implemen

• 5:00:00

• He seems like a little bit out of breath with that mask on 😅

• Someone who did the course – can you help me? I have a question about the lecture 1 – C

• no one feel his speed so high?i cant hear clearly what he said😭

• 50:00
  1:45:12
  2:22:00
  2:43:00

• 22:34:00

• Bookmark

• It feels like getting taught by Rayn Ranolds. Soo it's pretty interesting for me😂😂

• 43:30

• 9:23:28 I didn't expect any plot twists in a CS lecture

• Please remove your mask, it must feel very uncomfortable to talk loudly from that mask.

• Recfect full sir,,, thank you sir

• 17:05

• the 2023 (newer) vesrion is availible at
  https://www.youtube.com/watch?v=LfaMVlDaQ24
  also the python version (the normal one uses C) is availible at
  https://www.youtube.com/watch?v=nLRL_NcnK-4

• 1:45:00

• Where could I get the certification for this course?

• 14:32:00

• 12:07:00

• Ruth Maria Paul

• personal timestamp:
  woke up 2am after much procrastination i finally played it , finished 6:30am lol
  where i stopped: 56:07
  day 2 (actually 1 week later lol) 1:45:40

• day 01: 1:05:37

• Pls the scratch is it a app we can download

• Day 01 – 1:07:14 – Hello, Banana
  Day 02 – 2:05:39 – Compiling it again
  Day 03 – 2:39:34 – Commands

• thank you so much for publishing this

• YouTube videos can hit days in length???

• I just wasted 24 hours of my life. If you know how to program, you most likely won't learn anything new here.

Comments are closed.