21 lines
No EOL
804 B
TypeScript
21 lines
No EOL
804 B
TypeScript
//#region src/fp/array/uniqBy.d.ts
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/**
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* Creates a function that removes duplicate values by mapped identity.
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*
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* The first value for each mapped key is preserved. The returned function is
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* lazy-capable inside {@link pipe}.
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*
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* @template T - The type of elements in the array.
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* @template U - The type of comparison keys returned by the mapper.
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* @param mapper - Called with each value and index to produce a comparison key.
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* @returns A function that maps the piped array to unique values.
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*
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* @example
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* import { pipe, uniqBy } from 'es-toolkit/fp';
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*
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* pipe([{ id: 1 }, { id: 1 }, { id: 2 }], uniqBy(item => item.id));
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* // => [{ id: 1 }, { id: 2 }]
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*/
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declare function uniqBy<T, U>(mapper: (item: T, index: number) => U): (array: readonly T[]) => T[];
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//#endregion
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export { uniqBy }; |