I think you member should be like this
var members = [{unit:1,name: ["AA", "AB"],userid:["0001","0002"]},
{unit:2,name: ["BA", "BB"],userid:["0011","0012"]}];
var members = [{unit:1,name: ["AA", "AB"],userid:["0001","0002"]},
{unit:2,name: ["BA", "BB"],userid:["0011","0012"]}];
members.forEach(function(v,i){
if(v.unit==1)
{
console.log(v.name);
}
});