JS数组返回去重后数据的方法解析

function removeRepeat(data) {
var temp = "";
var mainData = [];
for (var i = 0; i < data.length; i++) {
if (!data[i].parent) {
temp = data[i];
for (var j = 0; j < data.length; j++) {
if (temp.DeliveryType == data[j].DeliveryType) {
data[j].parent = true;
}
}
mainData .push(data[i])
}
}
return mainData ;
}