JS version of Ruby's .each_with_index

Question

What is a method (or combination of methods) in Javascript that will iterate over the elements of an array and, aside operating on the elements of the array, will also allow me to use the index number of the current element?

In ruby this would equate to something like this:

array.each_with_index{ |element,index| element.method(index) }

Answer 1

For arrays([1, 2, 3]) you can use .forEach

array.forEach(function (element, index) {

});

for Objects ({a: 1, b: 2, c: 3}) you can use .forEach with combination Object.keys

Object.keys(obj).forEach(function (key) {
   var value = obj[key];
});