js迭代器有关问题

js迭代器问题

JScript code

var each = function(obj, fn){    /**    *在这里写代码，要求构造一个迭代器，对数组，对象进行遍历    *完成下面要求输出的结果    */};try{    var data1 = [4,5,6,7,8,9,10,11,12];    var data2 = {        "a": 4,        "b": 5,        "c": 6    };        console.group(data1);        each(data1, function(o){        if( 6 == this )            return true;        else if( 8 == this )            return false;        console.log(o + ": \"" + this + "\"");    });        console.groupEnd();    /*------[执行结果]------    1: "4"    2: "5"    4: "7"    ------------------*/        console.group(data2);        each(data2, function(v, n){        if( 5 == this )            return true;        console.log(n + ": \"" + v + "\"");    });        console.groupEnd();    /*------[执行结果]------    a: "4"    c: "6"    ------------------*/    }catch(e){    console.error("第1题执行出错，错误信息: " + e);}