How to iterate (keys, values) in javascript?

Question

I have a dictionary that has the format of

dictionary = {0: {object}, 1:{object}, 2:{object}}

How can I iterate through this dictionary by

Answer 1

As an improvement to the accepted answer, in order to reduce nesting, you could do this instead, provided that the key is not inherited:

for (var key in dictionary) {
    if (!dictionary.hasOwnProperty(key)) {
        continue;
    }
    console.log(key, dictionary[key]);
}

Edit: info about Object.hasOwnProperty here