Hash keys / values as array

Question

I cannot find the JavaScript equivalent of PHP array_keys() / array_values().

For people unfamiliar with PHP given the following JavaScript hash:

var myHash = {"apples": 3, "oranges": 4, "bananas": 42}

How can I get an array of keys, i.e.,

["apples", "oranges", "bananas"]

The same question with the values, i.e.,

[3, 4, 42]

jQuery can be used.

Answer 1

var a = {"apples": 3, "oranges": 4, "bananas": 42};    

var array_keys = new Array();
var array_values = new Array();

for (var key in a) {
    array_keys.push(key);
    array_values.push(a[key]);
}

alert(array_keys);
alert(array_values);