It was 1999. In my memory, I’m in Mr. Wilson’s chemistry class when I hear about the cause of the crash, but I’m not sure about that. What I am sure about, though, is the feeling: overwhelm at the sheer magnitude of the blunder. $327.6 million spacecraft was lost in seconds. Three years of development. Ten months traveling through space. All because two teams used different units. Could Rust have prevented this disaster? ...
Methods on built-ins Hashmap .entry — Used for in-place manipulation of the value for a corresponding key, scores.entry(team_id) .or_default — Insert an empty default value if the key is not present, returning a mutable reference, scores.entry(team_id).or_default() .or_insert — Insert a populated default value if the key is not present, also returning a mutable reference, sat_scores.entry(student_id).or_insert(400) String slice .len — Get the length of the string slice, name.len() .is_empty — Check if the string slice is empty, name.is_empty() .to_string — Convert a string slice to a String, name.to_string(); compare, contrast with String::from Keywords Variable Bindings and Data Declaration let — Declare a variable const — Declare a compile-time constant static — Declare a static variable (global variable with a fixed memory location) mut — Mark a binding as mutable ref — Bind by reference Type System type — Create a type alias struct — Define a structure/record type enum — Define an enumeration type trait — Define an interface type impl — Implement methods or traits dyn — Dynamic dispatch to a trait object Self — Type alias for the implementing type within a trait or impl self — Method receiver or current module super — Parent module where — Add constraints to generic types Control Flow if — Conditional branching else — Alternative branch in conditional match — Pattern matching loop — Infinite loop while — Conditional loop for — Iterator-based loop in — Part of for loop syntax and pattern matching break — Exit a loop early continue — Skip to the next loop iteration return — Return from a function Functions and Closures fn — Define a function move — Force closure to take ownership of captured variables async — Define an asynchronous function or block await — Suspend execution until an async result is ready Memory Management unsafe — Denote unsafe code block extern — Link to external functions or crates raw — Raw pointer operations (used with references) Modules and Visibility mod — Define a module pub — Make an item public use — Import items from other modules crate — Reference the current crate or external crate as — Rename or alias in imports Macros macro_rules! — Define a declarative macro Type Operations as — Type casting _ — Wildcard pattern or type placeholder Reserved for Future Use (No Functionality Yet) abstract become box do final macro override priv try typeof unsized virtual yield