each(obj, callback, context)

If obj is a List-like or an Iterator-like, each functions as eachIndex, iterating over numeric indexes from 0 to obj.length - 1 and calling callback with each property and index, optionally with context as this (defaulting to obj). If not, each functions as eachKey, iterating over every key on obj and calling callback on each one.

var foo = new DefineMap({ bar: "baz" });
var quux = new DefineList([ "thud", "jeek" ]);

canReflect.each(foo, console.log, console); // -> logs 'baz bar {foo}'
canReflect.each(quux, console.log, console); // -> logs 'thud 0 {quux}'; logs 'jeek 1 {quux}'