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59020cc50a
* array.prototype.flatmap: support ReadonlyArray * array.prototype.flatmap: support readonly result from callback
8 lines
295 B
TypeScript
8 lines
295 B
TypeScript
// This is the same type as the callable signature in `FlatMap` in `index.d.ts`.
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declare function flatMap<A, B, T extends object | undefined = undefined>(
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xs: ReadonlyArray<A>,
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fn: (this: T, x: A, index: number, array: A[]) => ReadonlyArray<B>,
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thisArg?: T
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): B[];
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export = flatMap;
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