Question

I have a piece of JavaScript code as follows:

function main(condition){
    if(condition){
        doSomething();
        return obj;
    }
}

now I want to refactor this code to get rid of the “if” statement. Here is what I want to do

function main(condition){
    var doSomethingAndReturnObj = function(){
        doSomething();
        return obj;
    }
    return condition && doSomethingAndReturnObj();
}

here is where I need help. The caller of main function expects a return value of “undefined” or an obj. In my refactored code, would my

return condition && doSomethingAndReturnObj();

convert the return value to a true and false type?

Thanks for your replies.

Answer 1

JavaScript’s && operator is coalescing.

js> 0 && 7
0
js> 1 && 7
7