12 lines
300 B
TypeScript
12 lines
300 B
TypeScript
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/**
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* Safely narrow unknown object and infer property existence
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* @param obj
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* @param key
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*/
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export function hasProp<K extends PropertyKey>(
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obj: unknown,
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key: K | null | undefined
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): obj is Record<K, unknown> {
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return key != null && obj != null && typeof obj === "object" && key in obj;
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}
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