title: Are JavaScript arrays actually linked lists?
body: <p>I'm new to Javascript, and notice that you don't need to specify an array's size and often see people dynamically creating arrays one element at time. This would be a huge performance problem in other languages as you would constantly need to reallocate memory for the array as it increases in size.</p>
  
  <p>Is this not a problem in JavaScript? If so, then is there a list structure available?</p>