Useful Rust features

Still need to make the compiler happy

Leaving off from last time

• Exercises:
  • Rustlings exercises for move semantics
  • Parsing file into string slices
• Anything regarding the borrow checker or Rust?

Exercises for today

• Enums
  • https://github.com/rust-lang/rustlings/tree/main/exercises/enums
• Vecs
  • https://github.com/rust-lang/rustlings/blob/main/exercises/vecs/vecs2.rs
• Iterators
  • https://github.com/rust-lang/rustlings/tree/main/exercises/standard_library_types
  • (itertools)
  • (rayon)
• Error handling
  • https://github.com/rust-lang/rustlings/tree/main/exercises/error_handling

More exercises (in-class and HW)

• Web backend API for a basic in-memory key-value store:
  • PUT /<key> Saves the request payload (body) as the value
  • GET /<key> Responds with the saved payload, or responds with 404 if there's nothing saved with that key
  • DELETE /<key> Deletes the key
  • Use actix-web or another async webserver library
• CSV to JSON converter
  • Given a CSV with header rows specified, output corresponding JSON to standard out with field names
  • Might want to use "serde_json" crate or "simdjson" crate
  • Example:

input.csv
first_name,last_name,age,hometown
johnny,johnson,29,mexico
jason,apple,21,usa
amy,barker,38,europe
allen,harper,93,england
jeremy,staller,19,australia

Run: csv2json input.csv

Outputs:

[
  {
    "first_name": "johnny",
    "last_name": "johnson",
    "age": "29",
    "hometown": "mexico"
  },
  ...
]