.update(target, source)

Updates the values (and properties if map-like) of target to match the values of source. Properties of target that are not on source will be removed. This does not recursively update. For that, use updateDeep.

For map-like objects, every enumerable property on target is copied:

var target = {name: {first: "Justin"}, age: 34};
var source = {name: {last: "Meyer"}};
var result = canReflect.update(target, source);
target //->  {name: {last: "Meyer"}}

With Arrays all items of the source will be replaced with the new items.

var target = ["a","b","c"];
var source = ["A","B"];
canReflect.update(target, source);
target //-> ["A","B"]