var MongoClient = require("mongodb").MongoClient; var topic_name = ["www", "html", "css", "javascript", "nodejs", "jquery", "louiscklaw1", "louiscklaw2", "louiscklaw3"]; var topic_status = ["no", "no", "no", "no", "no", "no", "no", "no", "no"]; var topic_hour = [2, 4, 4, 6, 10, 6, 1, 2, 3]; MongoClient.connect("mongodb://mongo:27017/", function (err, result) { if (!err) { console.log("We are connected"); var db = result.db("lab6-db"); db.collection("topicList").remove({}); for (let i = 0; i < topic_name.length; i++) { db.collection("topicList").insert({ name: topic_name[i], hour: topic_hour[i], status: topic_status[i], }); } } });