What is the fastest way to check if an object is empty or not?(检查对象是否为空的最快方法是什么？)
Is there a faster and better way than this:(有没有比这更快更好的方法：)
function count_obj(obj){
var i = 0;
for(var key in obj){
++i;
}
return i;
}
ask by clarkk translate from so
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
