$(function(){
	var users=[
		{"name":"nihao","age":20},
		{"name":"liming","age":21},
		{"name":"zhangsan","age":23},
		{"name":"zhaosi","age":25},
	]
	var admins=[];
	users.map(function (track) {
			if(track.age > 21){
				admins.push(track);
			}
    });
	for(var admin in admins){
		alert(admins[admin].name +"="+admins[admin].age)
	}
})
 

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