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JavaScript JavaScript Foundations Arrays Methods: Part 1

Posted by Tyrone Taylor
Tyrone Taylor
Courses Plus Student 11,792 Points

code challenge

can someone tell me what is wrong

spareWords.unshift("firstWord"); spareWords.shift();

index.html 
<!DOCTYPE html>
<html lang="en">
  <head>
    <title> JavaScript Foundations: Arrays</title>
    <style>
      html {
        background: #FAFAFA;
        font-family: sans-serif;
      }
    </style>
  </head>
  <body>
    <h1>JavaScript Foundations</h1>
    <h2>Arrays: Methods Part 1</h2>
    <script>
      var spareWords = ["The","chimney","sweep's","dog"];
      var saying = ["quick", "brown", "fox", "jumps", "over", "the", "lazy"];
      var firstWord = spareWords;
      var lastWord = spareWords;

      saying;
      saying;
    </script>
  </body>
</html>

2 Answers

Sean T. Unwin
Sean T. Unwin
28,690 Points
Sean T. Unwin
Sean T. Unwin
28,690 Points

I assume you got the first part of the challenge correct with (on line 18):

var firstWord = spareWords.shift();

The second part of the challenge wants you to assign the variable lastWord (on line 19) with the last item in the spareWords array while also removing that last item from the spareWords array. To do this you need to use pop().

If you are having trouble try watching the video again while doing the excerices that Jim is doing in your browser's DevTools.

Please continue to ask questions that you may have. :)

LaVaughn Haynes
LaVaughn Haynes
12,397 Points
LaVaughn Haynes
LaVaughn Haynes
12,397 Points

I'm not sure what you are trying to do but if you are having trouble with using shift and unshift, this is how they work:

// your array
var spareWords = ["The","chimney","sweep's","dog"];

// shift() REMOVES the first item in the array AND RETURNS IT
// in this case the item is returned to the variable theFirstSpareWord
var theFirstSpareWord = spareWords.shift(); // var theFirstSpareWord = "The";

// outputs: The
console.log( theFirstSpareWord );

// outputs: ["chimney", "sweep's", "dog"]
console.log( spareWords );

// unshift ADDS a value to the FRONT of an array
// in this case we prepend "Hello" to the array
spareWords.unshift( "Hello" );

// outputs: ["Hello", "chimney", "sweep's", "dog"]
console.log( spareWords );