Use pop() with JavaScript Associative Arrays

Question

How can I do something like the following in JS? I would like to imitate .pop() on an object rather than an array.

var deck = { 
    'cardK' :'13',
    'cardQ' :'12',
    'cardAJ':'11'
};

var val = deck.pop();


console.log("Key" + val.key ); 
console.log("Value" + val.val ); 

It seems like it's not possible.

Answer 1

.pop is only available on an array. In JavaScript, objects (which are essentially associative arrays) are not ordered like an array, so there is no .pop method.

You could use an array:

var deck = [
    { key: 'cardK', val: 13 },
    { key: 'cardQ', val: 12 },
    { key: 'cardAJ', val: 11 },
];

var val = deck.pop();
console.log('key: ' + val.key);
console.log('aa: ' + val.val);