Shorthand if/else statement Javascript

Question

I\'m wondering if there\'s a shorter way to write this:

var x = 1;
if(y != undefined) x = y;

I initially tried x = y || 1, but

Answer 1

Here is a way to do it that works, but may not be best practise for any language really:

var x,y;
x='something';
y=1;
undefined === y || (x = y);

alternatively

undefined !== y && (x = y);