Passing values inbetween functions within an object

Question

I am making a mini calendar. I am trying to pass the appropriate values into the view section of the object. But I keep on getting undefined in the view section. What am I doing wrong?

var date = {  

  monthsArray: ["January", "February","March","April","May","June","July","August", "September", "October", "November","December" ],
  init: function() {
    var fullDate = new Date();
    this.dateParsed(fullDate);
    this.view();
  },
  stringifyMonth: function(monthNumber) {
    var monthName = this.monthsArray[monthNumber]
    return monthName
  },
  dateParsed: function(fullDate){
   var fullDate = new Date();
   var monthNumber = fullDate.getMonth();
   var dayNumber = fullDate.getDate();
   var calanderYear = fullDate.getFullYear();
   this.stringifyMonth(monthNumber)
   return calanderYear
  },
  view: function(monthName){

    console.log(this.stringifyMonth())   ///  undefined 


  }

}.init()

@torazaburo That won't make any difference in this case as the date object is not used from outside. — Tushar
– Tushar, Commented Oct 18, 2015 at 6:12

Tushar · Accepted Answer · 2015-10-18 06:09:54Z

3

Two things:

Pass current month to the view function. You can get the month from date object using getMonth()
Pass the same month to the stringifyMonth from view

See the highlighted changes and comments

var date = {

  monthsArray: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
  init: function() {
    var fullDate = new Date();
    this.dateParsed(fullDate);

    
    // Get the current month from date object and pass to the view()
    this.view(fullDate.getMonth()); // <-----
  },
  stringifyMonth: function(monthNumber) {
    var monthName = this.monthsArray[monthNumber]
    return monthName
  },
  dateParsed: function(fullDate) {
    var fullDate = new Date();
    var monthNumber = fullDate.getMonth();
    var dayNumber = fullDate.getDate();
    var calanderYear = fullDate.getFullYear();
    this.stringifyMonth(monthNumber)
    return calanderYear
  },
  view: function(monthName) {
    
    // Pass the monthName to the stringifyMonth()
    console.log(this.stringifyMonth(monthName)); // <-----
  }
}.init();

edited Oct 18, 2015 at 6:09

answered Oct 18, 2015 at 6:08

Tushar

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2 Comments

Whymess Over a year ago

Can you explain why it didn't work the way I had it? Did it have to do with scope?

Tushar Over a year ago

@YoniMessing Since you haven't passed parameters, their value is undefined so the error is thrown. If you don't want to pass them as parameter and access directly you need to use this.varName

noodlez040 · Accepted Answer · 2015-10-18 06:09:26Z

2

stringifyMonth expects a parameter, but you are not passing one. thus, null is passed as a parameter, and then you are trying to access this.monthsArray[null], which is undefined.

Try passing a parameter like 1 and you will see that it print February.

answered Oct 18, 2015 at 6:09

noodlez040

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