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JavaScript JavaScript Foundations Objects Call and Apply

Posted by Peter McDonald
Peter McDonald
2,725 Points

i cant get my array to work in my argument

it is not ordering the sentence as i want it to.

index.html 
<!DOCTYPE html>
<html lang="en">
  <head>
    <title> JavaScript Foundations: Objects</title>
    <style>
      html {
        background: #FAFAFA;
        font-family: sans-serif;
      }
    </style>
  </head>
  <body>
    <h1>JavaScript Foundations</h1>
    <h2>Objects: Call and Apply</h2>
    <script>
      var genericGreet = function(name, mood) {
        name = name || "you";
        mood = mood || "good";
        return "Hello " + name + ", my name is " + this.name +
          " and I am in a " + mood + " mood!";
      }

      var andrew = {
        name: "Andrew"
      }

      var args1 = ["Michael", "awesome", ":)"];

      var greeting = genericGreet;
      greeting.apply(andrew, args1);
    </script>
  </body>
</html>

2 Answers

Hugo Paz
Hugo Paz
15,622 Points
Hugo Paz
Hugo Paz
15,622 Points

Hi Peter,

What output are you after?

I tested your work and got this ''Hello Michael, my name is Andrew and I am in a awesome mood!"

Peter McDonald
Peter McDonald
2,725 Points

Set the 'greeting' variable, on line 29, by using the 'genericGreet' function in the context of 'andrew' with the array of arguments, 'args1'.

this is the question and i believe that is the answer. at least thats what i have been shouting for.

Hugo Paz
Hugo Paz
15,622 Points
Hugo Paz
Hugo Paz
15,622 Points

You need to use the apply() method on the genericGreet variable like so:

var greeting = genericGreet.apply(andrew, args1);
Peter McDonald
Peter McDonald
2,725 Points

thanks! that did the trick