First of all, this is going to primarily be a place to store notes for myself as I learn Rust, so take everything I say with a grain of salt! (and feedback is always appreciated, so feel free to say hi)
Things to remember:
- variable(y) things
- variables need the "mut" tag to be changeable
- it's statically typed! (but has inference)
- tuples can hold different types, arrays cannot
- values in tuples can be accessed through "tuple.index"
- vectors are like arrays, but they can change size
- arrays can be defined as "let arr = [3; 4];", which would expand to "[3, 3, 3, 3]"
- "&" means a reference to an object
- enums have a fixed set of variables, called the variants
- can reassign variables, overwriting previous type and value (good for converting between types), called shadowing
- always have to annotate type for constants
- style things
- most names should be in "snake_case"
- types, enums, and traits should be in "CamelCase"
- anything static/constant should be in "SCREAMING_SNAKE_CASE"
- use underscores in big numbers to break them up ("10_000_000")
- various functions/expression things
- ".expect()" is used to handle possible errors, but panics if there is an error
- the "match" expression
- is made of arms
- each arm has a pattern and some code to run
- connect the code to the pattern with "=>"
- separate the arms with commas, not semicolons
- can also use "match" instead of a ".expect()" to handle errors (match output to "Ok" and "Err")
- miscellaneous things
- if it looks like a function but has a "!" at the end, it's a macro (?? what's a macro ??)
- "::" refers to an associated function of a "type" (static method)
- the "Result" enum has two variants, "Ok" and "Err"
- "gen_range()" is inclusive on the lower bound and exclusive on the upper
- can use "cargo doc --open" to view the documentation of the packages in your project
Things I'm not sure about
now wiki projects