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pwfcurry/hasKey.tsx

Created December 3, 2021 14:17
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TypeScript: narrowing unknown
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hasKey.tsx
// https://stackoverflow.com/questions/70028907/narrowing-an-object-of-type-unknown
export const hasKey = <K extends string>(key: K, object: unknown): object is Record<K, unknown> =>
typeof object === "object" && object !== null && key in object;
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