Closures

Closures are functions that captures variables from its surrounding lexical scope, allowing those variables to persist even after the function is executed outside its original context.

main.w

let createCounter = (): (): num => {
  let var count = 0; // This variable is part of the closure

  return () => {
    count = count + 1;
    return count;
  };
};

let counter = createCounter();

log(counter());
log(counter());
log(counter());

Wing console output

# Run locally with wing console
wing it

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