Maps the keys of an object using the provided function, generating a new object.
Object.keys()
to iterate over the object's keys.Array.prototype.reduce()
to create a new object with the same values and mapped keys using fn
.const mapKeys = (obj, fn) =>
Object.keys(obj).reduce((acc, k) => {
acc[fn(obj[k], k, obj)] = obj[k];
return acc;
}, {});
mapKeys({ a: 1, b: 2 }, (val, key) => key + val); // { a1: 1, b2: 2 }
JavaScript, Object
Maps the values of an object using the provided function, generating a new object with the same keys.
JavaScript, Object
Maps an object to an object array, using the provided mapping function.
JavaScript, Object
Deeply merges two objects, using a function to handle keys present in both.