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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | 8x 8x 2x 8x 2x 6x 6x 12x 12x 6x | import { Pred } from './_types';
import { purry } from './purry';
/**
* Loops each record element and flatMaps against provided function.
* @param record The target object.
* @param fn Mapping function.
* @returns The new record.
* @signature
* P.flatMapRecord(record, fn)
* @example
* P.flatMapRecord({ a: 1, b: 2, c: 3 }, ([k,v]) => [[k, v * 2], [k + "_abc", v * 2]]) // => { a: 2, a_abc: 2, b: 4, b_abc: 4, c: 6, c_abc: 6 }
* @data_first
* @pipeable
* @category Object
*/
export function flatMapRecord<
T extends Record<string, unknown>,
K extends string,
V
>(
record: T,
fn: Pred<[keyof T, T[keyof T]], ReadonlyArray<[K, V]>>
): Record<K, V>;
/**
* Loops each record element and flatMaps against provided function.
* @param record The target object.
* @param fn Mapping function.
* @returns The new record.
* @signature
* P.pipe(record, P.flatMapRecord(fn))
* @example
* P.pipe(({ a: 1, b: 2, c: 3 }, P.flatMapRecord(([k,v]) => [[k, v * 2], [k + "_abc", v * 2]])) // => { a: 2, a_abc: 2, b: 4, b_abc: 4, c: 6, c_abc: 6 }
* @data_last
* @pipeable
* @category Object
*/
export function flatMapRecord<
T extends Record<string, unknown>,
K extends string,
V extends unknown
>(
fn: (v: [keyof T, T[keyof T]]) => ReadonlyArray<[K, V]>
): (record: T) => Record<K, V>;
export function flatMapRecord() {
return purry(_flatMapRecord(), arguments);
}
const _flatMapRecord = () => <
T extends { [k: string]: any },
K extends string,
V
>(
rec: T,
fn: (v: [keyof T, T[keyof T]]) => ReadonlyArray<[K, V]>
) => {
return Object.entries(rec)
.map(([k, v]) => {
return fn([k as keyof T, (v as unknown) as T[keyof T]]);
})
.reduce((acc, w) => {
for (const [k, v] of w) {
acc[k] = v;
}
return acc;
}, {} as Record<K, V>);
};
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