CS50 Indonesia 2023-2024

Joshua Sacher

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Sections

• Week 9
• Week 8
• Week 7
• Week 6
• Week 5
• Week 4
• Week 3
• Week 2
• Week 1
• Week 0

Other Stuff

• Useful Resources
• Contact Josh
• About Josh

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Sections

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Week 9

The last section

Thanks so much for attending!

Slides

Code examples

Topics

• Flask
• Flask + SQL
• Sessions
• AJAX
• JSON

Useful shorts

• Flask
• AJAX

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Week 8

Slides

Code examples

Topics

• TCP/IP
• DNS
• HTTP/HTTPS
• HTML
• CSS
• Frameworks
• Javascript

Useful shorts

• Internet Primer
• IP
• TCP
• HTTP
• HTML
• CSS
• JavaScript
• DOM

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Week 7

Slides

Code examples

Topics

• Python
  • Working with flat files (CSVs)
  • Lambda functions
• Relational databases and SQL
  • CRUD
  • SQL commands
  • Data types
  • Database structure, joins
• sqlite3
  • Alternative: phpliteadmin
  • Offline:
    • SQLite Browser
    • DBeaver (handles multiple database formats)
• SQL in Python
• Race conditions
• SQL injection attacks

Useful shorts

• SQL

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Week 6

Slides

Code examples

Topics

• Python data types
• Variables, loops, and conditionals
• Object-oriented programming
• Command-line arguments
• Libraries
  • CSV
  • re

Useful shorts

• Python

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Week 5

Slides

Code examples

Topics

• Linked lists
  • Nodes
  • -> operator
  • Comparison with arrays
• Stacks, queues
• Hash tables
• Trees
• Tries

Useful shorts

• Queues
• Stacks
• Data Structures
• Structures
• Singly-Linked Lists
• Doubly-Linked Lists
• Hash Tables
• Tries

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Week 4

Slides

Code examples

Topics

• Hexadecimal
• Memory addresses
• * operator
• & operator
• Pointers
• The truth about strings
  • Why we need string.h
• Memory manipulation and issues
  • allocation (malloc)
  • freeing
  • Error checking with valgrind
  • Overflows
• scanf
• Intro to file handling

Useful shorts

• Hexadecimal
• Pointers
• Defining Custom Types
• Dynamic Memory Allocation
• Call Stacks
• File Pointers

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Week 3

Slides

Code examples

Topics

• Big O notation
• Searching
  • Linear search
  • Binary search
• Sorting
  • Selection sort
  • Bubble sort
  • Merge Sort
• Recursion
• Data structures

Useful shorts

• Binary search
• Bubble sort
• Linear search
• Merge sort
• Recursion
• Selection sort

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Week 2

Arrays in C

Slides

Code examples

Topics

• Compiling
• Debugging
• Review: data types
• Arrays
• Strings
• Command-line arguments

Useful shorts

• Arrays
• Command line arguments

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Week 1

Introduction to C

Slides

Code examples

Topics

• Review of general CS concepts and implementation in C
  • Variables
  • Conditionals
  • Loops
  • Functions
    • Creating your own functions
• Operators
• Data types
• code.cs50.io environment
• Linux and the command line
  • Common commands
• help50 and check50

Note – Topics with more detail next week:

• Compiling
• Debugging

Useful shorts

• Command Line
• Conditional Statements
• Data Types
• Functions
• Loops
• Operators

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Week 0

Introduction & Scratch

Slides

Topics

• The course in general
• Binary
• ASCII and Unicode
• RGB
• Abstraction
• Algorithms and algorithmic complexity
• Pseudocode
• Scratch

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Other Stuff

Resources

• Course website
• Office hours
• Manual pages
• Discussion forum
• CS50 Shorts
• Google and Stack Overflow

Contact Josh

Email me!

About Josh

• CS50 experience
  • CS50 student in Fall 2016 – first CS class at 32 years old!
  • Teaching fellow/course assistant for CS50 and related classes since 2017
    • 2nd time with CS50 Indonesia
• Work
  • Drug discovery scientist at Photys therapeutics
    • Cheminformatician/computational chemist – the intersection of chemistry and data science
  • Company focuses on new treatments for cancer, other diseases
• Education
  • B.S. in biochemistry, University of Delaware (2005)
  • Ph.D. in chemistry, Penn State University (2012)
  • Certificate in bioinformatics, Harvard Extension School (2018)
• Location
  • Currently living in Dallas, Texas, United States
  • Originally from Wilmington, Delaware, United States (home of President Joe Biden)