Question

I want to declare a local variable as such:

(var n=1)

Mostly so I can manipulate the order it gets evaluated in.

Eg Then I could do

var increaseadNumber = (
    ar={
        inc:function(n){
            return n+1
        },
        dec:function(n){
            return n+2
        }
   }
).inc(1);
console.log(ar)//the object
console.log(increaseadNumber )//2

But, in my example ar is in the global namespace, and

var increaseadNumber = (
  var ar={
        inc:function(n){
            return n+1
        },
        dec:function(n){
            return n+2
        }
   }
).inc(1);//syntax error

generates “SyntaxError: Unexpected token var”

Granted I could declare this over 2 statements, but I would prefer to it with 1 statement.

Answer 1

Why not separate it into two lines?

var ar={inc:function(n){return n+1},dec:function(n){return n+2}};
ar.inc(1);

And add some sensible white space while you’re at it:

var ar = {
    inc: function(n) {
        return n + 1
    },
    dec: function(n) {
        return n + 2
    }
};
ar.inc(1);

Or if you’re really whitespace-averse, here’s a compromise:

var ar = {
    inc: function(n) { return n + 1 },
    dec: function(n) { return n + 2 }
};
ar.inc(1);