mapValues

Problem

You need to transform every value in an object while keeping the same keys — for example rounding all numeric fields or formatting display values.

Solution

Use mapValues(obj, mapper) to produce a new object with the same keys and transformed values.

import { mapValues } from '@vielzeug/arsenal';

const prices = { apple: 1.234, banana: 0.567, cherry: 2.891 };
mapValues(prices, (v) => Math.round(v * 100) / 100);
// { apple: 1.23, banana: 0.57, cherry: 2.89 }

Pitfalls

• Returns a new object — the original is not mutated.

Related

• mapKeys
• filterValues