Undefined item pushed in my array?

Question

Im creating an object and pushing to an array this.reminders , but an undefined is also gets push why is that? This code will give me work [ { description: 'Get to work in time', set_title: 'work related' }, undefined ]

   var ReminderSet = function(set_name) {
        this.set_name = set_name; 
        this.reminders = [];
    };

    ReminderSet.prototype.add = function(reminder, title) {
        this.reminders.push(reminder, title);
        console.log(this.set_name, this.reminders)

    };

    ReminderSet.prototype.list = function() {
        console.log(this.reminders); 
    };

    var Reminder = function(description,set_title) {
        this.description = description;
        this.set_title = set_title;
        //Describes the reminder
    };

var work = new ReminderSet("work")
          .add(new Reminder("Get to work in time", "work related"));

well, your add method pushes in reminder and title, but your your code calls it with a new Reminder object, and no title ;) — Icepickle
– Icepickle, Commented Oct 19, 2017 at 7:46

Robby Cornelissen · Accepted Answer · 2017-10-19 07:46:10Z

3

Your add() method takes two parameters:

ReminderSet.prototype.add = function(reminder, title) { /*...*/ }

But you're passing only one (i.e. a Reminder object):

var work = new ReminderSet("work")
      .add(new Reminder("Get to work in time", "work related"));

This causes the second parameter to be undefined.

answered Oct 19, 2017 at 7:46

Robby Cornelissen

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