Power Tools: Typed Arrays & Union Types
9 min · TypeScript
Type your arrow functions, map over typed arrays, and narrow union types.
TypeScript · Power Tools: Typed Arrays & Union Types0/5 cleared
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An arrow function can be typed just like a regular one: (n: number): number => n * n. TypeScript checks the parameter and return types match wherever it's called.
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Ln 1, Col 1Spaces: 4
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