JavaScript判断变量名是否存在数组中的实例

var array=[{name:"张珊",sex:"男"}];
 console.log(array);
 if(array[0].name){
  console.log('name');//返回name
 }

 if(array[0].size){
  console.log('size')
 }else{
  console.log('no size');//返回no size
 }