var some_hash={'1','2','3'}
for(var key in some_hash){
some_hash.push(key+1);
}
var names = Object.getOwnPropertyNames(obj);
for (var i = 0, len = names.length; i < len; ++i)
{
obj['prop' + i] = i;
names = Object.getOwnPropertyNames(obj);
len = names.length;
}
var some_hash = {};
var key = 1;
while (true) {
some_hash.push(key++);
}