mapMerge

function Object.mapMerge<T extends object>(
    target: T,
    map: (target: NoInfer<T>) => Partial<NoInfer<T>>,
): T

Merges target object with the result of calling map function on target, creating a new object with existing keys updated.

Example

data-first

import { Object } from "@monstermann/object";

Object.mapMerge({ a: 1, b: 2 }, (obj) => ({ a: obj.a * 2 })); // { a: 2, b: 2 }

data-last

import { Object } from "@monstermann/object";

pipe(
    { a: 1, b: 2 },
    Object.mapMerge((obj) => ({ a: obj.a * 2 })),
); // { a: 2, b: 2 }