Question

I have these declarations:

var a;
var b = 1;
var c = 2;
var d = a || b, c;

d is 1 , so what is the meaning of the ,c in the expression?

Answer 1

The construct

var d=a||b, c;

does two things :

• it declares d and assigns it the value a||b
• it declares the c variable

As c was already declared, I’d say it’s totally useless.