Online Rust Editor

Starter snippet

fn main() {
    let names = vec!["ace", "rust"];
    let upper: Vec<_> = names.iter().map(|s| s.to_uppercase()).collect();
    println!("{:?}", upper);
}

Result + iterator

fn parse_ids(input: &str) -> Result<Vec<u32>, std::num::ParseIntError> {
    input.split(',')
        .map(str::trim)
        .map(|s| s.parse())
        .collect()
}

Variables

let mut count = 0;  let name = String::from("ct");

Loops

for item in &items { }  while cond { }

Functions / methods

fn slug(input: &str) -> String { input.to_lowercase() }

Comments

// line  /* block */  /// doc

Variables

int count = 0;
const char *name = "ct";

Loops

for (int i = 0; i < n; i++) { }
while (cond) { }

Parse → transform → emit

// Rust pipeline sketch
const input = readLines();
const output = input
  .map(line => line.trim())
  .filter(Boolean)
  .map(transform);
writeLines(output);

Error handling wrapper

// Rust
function runSafely(task) {
  try {
    return { ok: true, value: task() };
  } catch (err) {
    return { ok: false, error: String(err) };
  }
}

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