Defaultdict equivalent in javascript

Question

In python you can have a defaultdict(int) which stores int as values. And if you try to do a \'get\' on a key which is not present in the dictionary you get zero as default

Answer 1

I don't think there is the equivalent but you can always write your own. The equivalent of a dictionary in javascript would be an object so you can write it like so

function defaultDict() {
    this.get = function (key) {
        if (this.hasOwnProperty(key)) {
            return key;
        } else {
            return 0;
        }
    }
}

Then call it like so

var myDict = new defaultDict();
myDict[1] = 2;
myDict.get(1);