Question

I have this associative array :

Arr =  {
     "ID1":{"Attr1":"b","Attr2":"5"},
     "ID2":{"Attr1":"d","Attr2":"2"},
     "ID3":{"Attr1":"h","Attr2":"8"}
     }

and I want to sort it with the attribute 2 by numbers and not the ID in descending Order to obtain this result :

Arr =  { 
     "ID3":{"Attr1":"h","Attr2":"8"}
     "ID1":{"Attr1":"b","Attr2":"5"},
     "ID2":{"Attr1":"d","Attr2":"2"},
     }

If this possible ?

Answer 1

Object.keys( Arr ).sort(function( a, b ) {
    return +Arr[ b ].Attr2 - +Arr[ a ].Attr2;
}).forEach(function( key ) { 
    console.log( key );
});

By invoking Object.keys and Array.prototype.sort, you can at least sort the keys of any object. With that, you can access those key / value pairs in order.

The output of the above snippet is

ID3
ID1
ID2