I have a developer for last 3 years, have been using if-else or if-else if statements a lot in my programing habit.

And today, I found This link.

One obvious sample i put here

public void doSomthing(String target, String object){
    //validate requests
    if(target != null && target.trim().length() < 1){
        //invalid request;
    }

    //further logic

}

Now, I have seen this sort of check all over the places, libraries. So, I wanted to have a discussion about the worthiness of such a movement.

Please let me know your views.