19 lines
923 B
TypeScript
19 lines
923 B
TypeScript
import { ExtractNestedArrayType } from './flattenDeep.mjs';
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/**
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* Recursively maps each element in an array using a provided iteratee function and then deeply flattens the resulting array.
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*
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* @template T - The type of elements within the array.
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* @template U - The type of elements within the returned array from the iteratee function.
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* @param {T[]} arr - The array to flatten.
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* @param {(item: T, index: number, array: readonly T[]) => U} iteratee - The function that produces the new array elements. It receives the element, its index, and the array.
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* @returns {Array<ExtractNestedArrayType<U>>} A new array that has been flattened.
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*
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* @example
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* const result = flatMapDeep([1, 2, 3], n => [[n, n]]);
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* // [1, 1, 2, 2, 3, 3]
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*/
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declare function flatMapDeep<T, U>(arr: readonly T[], iteratee: (item: T, index: number, array: readonly T[]) => U): Array<ExtractNestedArrayType<U>>;
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export { flatMapDeep };
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