Rust Workshop 2

Leaving off from last time

• Exercises:
  • Calculator?
  • Game of Life?
  • Advent of Code?
  • github.com/sumeet/sfrust_week1

Borrow checker

• Stack vs heap
  • Stack is: "scratch space" used for functions and variables, fixed-size, and each function call
  • Heap is: "extra space" for data that's kept around between function calls or, dynamically (?) sized datas
  • Let's look at some C
• What is meant by "allocating"?
• "Use after free" & "Memory leak"
• Garbage collection?
  • In Rust?
• Quickly touching on lifetimes
  • Vec of slices
  • 'static?

Borrows, borrows, borrows (Vids + Exercises)

• Ownership: http://intorust.com/tutorial/ownership/
• Shared borrows: http://intorust.com/tutorial/shared-borrows/
• Mutable borrows: http://intorust.com/tutorial/shared-borrows/

In-class Assignments

• Rustlings: https://github.com/rust-lang/rustlings/tree/main/exercises/move_semantics
• read_to_string() + store list of words that appear in text inside of an array
  • First do it naively using copying
  • Can you do it without copying (allocating) any strings?

Homework

• Command line program:
  • Usage: dict text.txt
  • Function: Reads the words in text.txt, and organizes them based on the starting letter. Example:

text.txt:

hi this is a text file with some words and stuff