Javascript Data Type How to - Apply math to values in a String array

Question

We would like to know how to apply math to values in a String array.

Answer


<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'>
<!-- ww w  . j ava 2s . c  o  m-->
var myarray = ["5,35.0", 
               "15,45.0", 
               "25,45.0", 
               "35,50.0", 
               "45,60.0", 
               "55,65.0", 
               "65,60.0", 
               "75,60.0", 
               "85,70.0", 
               "95,80.0"];
var out = myarray.map(function(el) {
  var xy = el.split(',').map(Number);
  xy[1] = (xy[1] * 2).toFixed(1);

  return xy.join(',');
});
console.log(out)

</script>
</head>
<body>
</body>
</html>

The code above is rendered as follows: