Practicing Methods

challenge33.js

// -----------
//   W/ CONSTRUCTOR
//  ---------
// The constructor pattern is reccomened for this use case, because
// you only have to define the function once, then every Object
// will have access to that function.
function ZodiacInfo(sign, dates, element) {
  this.sign = sign;
  this.dates = dates;
  this.element = element;
};

// to pass in param, update function (i think you are just missing the param.
ZodiacInfo.prototype.astrologyMethod = function (funnyWord) {
    return "If your birthday is between "+ this.dates +
      ", then your zodiac sign is " + this.sign + 
      ", and your element is " + this.element + "and a funny word is " + funnyWord;
};

var aquarius = new ZodiacInfo("aquarius", "1/20 - 2/18", "air");


aquarius.astrologyMethod("GLORP");


// -----------
//   Without CONSTRUCTOR
//  ---------


var gemini = {
  sign: "gemini" ,
  dates: "5/21 - 6/20" ,
  element: "water",
  // a method
  astrologyMethod: function(funnyWord) {
    return "If your birthday is between "+ this.dates +
            ", then your zodiac sign is " + this.sign + 
            ", and your element is " + this.element + "and a funny word " + funnyWord;
  }
};

console.log(gemini.astrologyMethod("GLORP));
// -----------
//   Without CONSTRUCTOR adding function outside of function
//  ---------
var gemini = {
  sign: "gemini" ,
  dates: "5/21 - 6/20" ,
  element: "water",
};
                                   
gemini.astrologyMethod = function(funnyWord) {
    return "If your birthday is between "+ this.dates +
            ", then your zodiac sign is " + this.sign + 
            ", and your element is " + this.element + "and a funny word " + funnyWord;
  }