Question

I am trying to set up a javascript object with one of it’s items being a function. I am doing a little bit of self reference and it is not working.

var onTimePoints = function($a, $b, $c, $lifeotr){

    $var1 = ($b - $a) / $c;
    $var2 = ($lifeotr - $a) / $var1;
    if($var2>$c)
    {
    $var2 = $c;
    }
    if($var2<0)
    {
    $var2 = 0;
    }
    $var2 = Math.round($var2);
    return $var2;
}
var lifeData ={
      min: 25000,
      max: 65000,
      otr: 56426,
      maxPoints:100,
      otp: onTimePoints(25000, 65000, 100, 56426),
      test: function(){
        alert(this.min);
      }
}

When I do conosle.log(lifeData.otp) it works.

When I replace the hard coded numbers with this.min, this.max, etc… it doesn’t work.

Here is an example of what doesn’t work:

var lifeData ={
  min: 25000,
  max: 65000,
  otr: 56426,
  maxPoints:100,
  otp: onTimePoints(this.min, this.max, this.maxPoints, this.otr),
  test: function(){
    alert(this.min);
  }
}

In this case console.log(lifeData.otp) returns NaN.

I am sure that I am just overlooking something. Appreciate if you know the issue.

Answer 1

You can’t do what you’re trying to do.

Consider:

var lifeData ={
  min: 25000,
  max: 65000,
  otr: 56426,
  maxPoints:100,
  otp: onTimePoints(25000, 65000, 100, 56426),
  otNewcomm: formula,
  test: function(){
    alert(this.min);
  }
}

or

var min = 25000;
var max = 65000;
var otr = 56426;
var maxPoints = 100;
var lifeData ={
  min: min,
  max: max,
  otr: otr,
  maxPoints: maxPoints,
  otp: onTimePoints(min, max, maxPoints, otr),
  otNewcomm: formula,
  test: function(){
    alert(this.min);
  }
}

or

function lifeData(min, max, otr, maxPoints)
{
    this.min = min;
    this.max = max;
    this.otr = otr;
    this.maxPoints = maxPoints;
    this.otp = onTimePoints(min, max, maxPoints, otr);
    ...
}
var lifeDataInstance = new lifeData(25000, 65000, 56426, 100);