7 lines
216 B
TypeScript
7 lines
216 B
TypeScript
// @lib: es2019
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const array: number[] = [];
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const readonlyArray: ReadonlyArray<number> = [];
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array.flatMap((): ReadonlyArray<number> => []); // ok
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readonlyArray.flatMap((): ReadonlyArray<number> => []); // ok
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