2019-02-07 16:10:34 +01:00
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// @lib: es2019
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2018-08-01 08:44:53 +02:00
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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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