title: function with array.join -help in javascript
body: <p>so before anything my experience with JavaScript is not that much, I'm trying to make a function called hashtag_it with an array and i want to add # before every index in this array so when I call the function the output is going to be #programming,#code , i tried to use array.join method but it didn't really work</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>function hashtag_it(my_array) {
    my_array = ['programming','code']; 
    console.log(my_array.join('#'))
  } 
  console.log(hashtag_it());</code></pre>
  </div>
  </div>
  </p>