Question

I get a return value from a function which is always string. i used typeof(obj) which turns out to be string always.

Date.functionName=Date.prototype.functionName=function(dataObj) {
        //The dataObj is always string. 
            // How can i differentiate between the values... 
};

I have three things coming as strings..

1. Date
2. String…
3. Integer values…

All the three are of type string.

1. How can i differentiate these three values.
2. Is it correct to use Date.mycustomfunction… or should i use some
   other class…

Answer 1

You can use isNaN to check if it’s an integer or not. And there’s some interesting ideas here for isDate type of functionality. Also some answers here may help: How can I determine whether a given string represents a date?