为了计算JavaScript数组对象，我们使用Object.prototype .__ proto__属性。
您可以尝试运行以下代码来计算数组对象-
<html>
<head>
<title>JavaScript Clone Date</title>
</head>
<body>
<script>
var len = 0;
var myArr = [{"你好，世界！":"Welcome!","int":10},{"Learn":"Share","int":20},{"Tutorials":"Quiz","int":30}];
myArr.forEach(function(val){
if(!val.__proto__.__proto__){
len++;
}
});
document.write("Total Objects: "+len);
</script>
</body>
</html>输出结果
Total Objects: 3