[jQuery] Checking length/size of hash object

[jQuery] Checking length/size of hash object


Hi All,
is there a native, or jQuery way to check the size/length of a hash object?
For instance to check the length of an array, you would do something like:
var x = [1,2];
x.length; // is 2
But how would I check this:
var x = {n:2,m:4};
Thanks in advance :)
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