mapEach

Lifts one item transform into a list transform.

const toUser = rename({user_id: 'id'});
const toUsers = mapEach(toUser);

toUsers([{user_id: 1}, {user_id: 2}]);
// [{id: 1}, {id: 2}]

null and undefined inputs return an empty array:

toUsers(null); // []

The returned array is new, and each item is transformed in order. Inputs other than an array, null, or undefined are outside the function's contract.

See mapEach in practice for complete record-list and paginated-response examples.

See Failure behavior for non-array inputs and item-transform errors.