rustbites rustbites bite-sized rust tips
Archives About
#004 Jan 20, 2022
result option

4. Option -> Result

Convert Option to Result easily.

1
2
3

let o: Option<u32> = Some(200u32);
let r: Result<u32,()> = o.ok_or(());
assert_eq!(r, Ok(200u32));

This post is licensed under CC BY 4.0 by the author.

Share:
← Previous 3. Result -> Option Next → 5. Loop breaks and labels

Trending Tags

Rust Std Iterators Iterator Collections Performance Option Slices Strings Vec Integers Result Parsing Concurrency Rust-1.95 Error-Handling Sync Arrays Math Overflow Ownership Slice Sorting Functional Interior-Mutability Mem Stdlib Hashmap Pattern-Matching Smart-Pointers Allocation Arc Cow Ffi Lazylock Path Rust-1.93 Async Attributes Borrow-Checker Btreemap Cell Closures Debugging Entry Ergonomics Filesystem Generics Idioms Io Iter Rust-1.94 Search Algorithms Api-Design Arithmetic Atomics Bit-Manipulation Char Default Enum Float Future Hints Impl-Trait Lazy Lazycell Macro Match Maybeuninit Nonzero Numerics Oncelock Patterns Peekable Pin Ranges Rc Rust-1.96 Rust-2024 Rwlock Smart-Pointer State-Machine Static Testing Traits Utf-8 Vecdeque Alignment Array-Windows Atomic Benchmarking Binary-Heap Binaryheap Bool Box Break Bytes Casting Cfg Clippy Closure Cmp Collect Combinators Comparison Compile-Time Compiler Conditional-Compilation Const Const-Generics Constants Control-Flow Controlflow Conversions Copy Cross-Platform Data-Processing Deref Diagnostics Dispatch Display Drain Duration Enumerate Enums Error-Messages File File-Locking Filter Flatten Floats Fmt Fn Fnmut Fnonce Fold Formatting From_fn Fs Gotcha Guards Hashset If-Let Initialization Inline Intersperse Into-Iter Lazy-Init Lazy-Initialization Let-Chains Lifetime Lifetimes Lints Loop Macros Map Map_while Match-Guards Matching Mem-Replace Memory Mutex Niche Num Numeric Oncecell Optimization Ord Ordering Panic Panics Pathbuf Pettern Phantom-Data Pin-Project Pipes Position Precision Processes Raw String Refcell Rust-1.79 Rust-1.88 Rust-1.91 Scan Scoped-Threads Sort Statics Str String Structs Syntax Threads Time Tokio Trait-Objects Try-Fold Type-Inference Type-Safety Types Unicode Unsafe Unsafecell Unzip Upcasting Validation Weak Zero-Sized-Types

Recently updated

#237 237. Iterator::eq — Compare Two Sequences Without Collecting Them First #238 238. slice::chunks_exact_mut — Edit a Slice in Fixed-Size Blocks Without Index Math #239 239. Vec::drain — Remove a Range and Keep What You Pulled Out #240 240. to_le_bytes / from_le_bytes — Serialize Integers Without unsafe or Bit-Shifting #241 241. slice::split_first — Peel the Head Off a Slice, Keep the Tail, No Indexing

About

A collection of bite-sized Rust tips and tricks. Small, focused lessons to help you write better Rust.

info@rustbites.com
rustbites rustbites · 2022—2026
X RSS

This site uses cookies for analytics and ads. Learn more