title: How to convert multiple d3.csv data into number?
body: <p>right now after loading csv file I am looping each object within an array and converting one by one.</p>
  
  <p>which looks like</p>
  
  <pre><code>fulldata.forEach(function(data){
        data.healthcare = +data.healthcare;
        data.a = +data.a;
        data.b = +data.b;
        data.c = +data.c;
      })
  </code></pre>
  
  <p>assume there are about 100 feature that you need to convert into number, is there a way that convert multiple feature into number at once? </p>