JAVA COLLECTIONS FRAMEWORK CHEAT SHEET CODE

On proper Iterator STD then x = next() until exhausted (first None).Ĭonditional branch REF if expression is true.īlock label, RFC can be used with break to exit out of this block. BK STD REFĮffectively converts any IntoIterator STD type into proper iterator first. Loop, REF run while expression x is true. Control Flow urlĬontrol execution within a function. Guarantees S is well-behaved w.r.t T people may use T on S safely.ġ Most documentation calls them function pointers, but function references might be more appropriate 🔗 as they can't be null and must point to valid target. Guarantees to compiler ' I have checked requirements, trust me'.

of T can cause UB implementor must check'. Means ' calling can cause UB, ↓ YOU must check requirements'. If you enjoy debugging segfaults Friday night unsafe code. Move closure REF taking ownership i.e., y transferred into closure.Ĭlosures sometimes look like logical ORs (here: return a closure). Same, without block expression may only consist of single expression. algebraic data types, tagged unions.ĭefine variants of enum can be unit- A, tuple- B () and struct-like C an impl Future.įunction references, 1 BK STD REF memory holding address of a callable.Ĭallable Trait BK STD (also FnMut, FnOnce), implemented by closures, fn's …Ī closure BK EX REF that borrows its captures, ↓ REF (e.g., a local variable).Ĭlosure accepting one argument named x, body is block expression. Occupies no space, optimized away.ĭefine an enum, BK EX REF c. 0 of type T.ĭefine zero sized NOM unit struct. Exampleĭefine a struct BK EX STD REF with named fields.ĭefine struct with named field x of type T.ĭefine 'tupled' struct with numbered field. Data Structures urlĭata types and memory locations defined via keywords. Opinion 💬 - If you have never seen or used any Rust it might be good to visit one of the links above before continuing the next chapter might feel a bit terse otherwise. In addition, have a look at the usual suspects. Rust in Easy English - 60+ concepts, simple English, example-driven.

JAVA COLLECTIONS FRAMEWORK CHEAT SHEET CODE

Tour of Rust - Live code and explanations, side by side.

If you are new to Rust, or if you want to try the things below: Hello World

Java collections framework cheat sheet