35 lines
1.8 KiB
TypeScript
35 lines
1.8 KiB
TypeScript
import { ValueIteratee } from '../_internal/ValueIteratee.mjs';
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/**
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* Creates a new object that reverses the keys and values of the given object, similar to the invert.
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* The values of the new object are arrays of keys that correspond to the value returned by the `iteratee` function.
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*
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* @param {Record<string|number, T>} object - The object to iterate over
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* @param {ValueIteratee<T>} [iteratee] - Optional function to transform values into keys
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* @returns {Record<string, string[]>} An object with transformed values as keys and arrays of original keys as values
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*
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* @example
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* const obj = { a: 1, b: 2, c: 1 };
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* invertBy(obj); // => { '1': ['a', 'c'], '2': ['b'] }
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*
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* @example
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* const obj = { a: 1, b: 2, c: 1 };
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* invertBy(obj, value => `group${value}`); // => { 'group1': ['a', 'c'], 'group2': ['b'] }
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*/
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declare function invertBy<T>(object: Record<string, T> | Record<number, T> | null | undefined, interatee?: ValueIteratee<T>): Record<string, string[]>;
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/**
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* Creates a new object that reverses the keys and values of the given object, similar to the invert.
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* The values of the new object are arrays of keys that correspond to the value returned by the `iteratee` function.
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*
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* @param {T} object - The object to iterate over
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* @param {ValueIteratee<T[keyof T]>} [iteratee] - Optional function to transform values into keys
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* @returns {Record<string, string[]>} An object with transformed values as keys and arrays of original keys as values
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*
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* @example
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* const obj = { foo: { id: 1 }, bar: { id: 2 }, baz: { id: 1 } };
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* invertBy(obj, value => String(value.id)); // => { '1': ['foo', 'baz'], '2': ['bar'] }
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*/
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declare function invertBy<T extends object>(object: T | null | undefined, interatee?: ValueIteratee<T[keyof T]>): Record<string, string[]>;
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export { invertBy };
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