title: Meaning of var t={}; Variable equals curly braces
body: <p>I’m very new to JavaScript, and have recently learned about declaring variables with <code>var</code>. like <code>var a = 12</code> or whatever. But, I came across a line in some code for a website I was reading through for fun which read <code>var t={};</code>. 
  This was actually only the second line of code.
  I can’t seem to find any explanation online anywhere for what it means to set a variable to equal a set of empty curly braces.
  I thought it might be a way of declaring an array or something??</p>