JS 实现 JSON数组查询

//定义一个json数组
var arr = [
  {"name":"apple", "count": 2},
  {"name":"orange", "count": 5},
  {"name":"pear", "count": 3},
  {"name":"orange", "count": 16},
];
//快速查找
var newArr = arr.filter(function(p){
     return p.name === "orange";
});