title: Convert a 2D JavaScript array to a 1D array
body: <p>I want to convert a 2D JavaScript array to a 1D array, so that each element of the 2D array will be concatenated into a single 1D array.</p>
  
  <p>Here, I'm trying to convert <code>arrToConvert</code> to a 1D array.</p>
  
  <pre><code>var arrToConvert = [[0,0,1],[2,3,3],[4,4,5]];
  
  console.log(get1DArray(arrToConvert)); //print the converted array
  
  function get1DArray(2dArr){
      //concatenate each element of the input into a 1D array, and return the output
      //what would be the best way to implement this function?
  }
  </code></pre>