numberize() convert numbers in string format to float

numberize.js

// Convert number from string type to number type
// It's a shallow convertion only 1 level deep
// param {object|array|string|number} o variable to be converted
// return {object|array|string|number} converted variable
function numberize(o) {
  if (typeof o === "string" || typeof o === "number") {
    if (!isNaN(o)) {
      o = parseFloat(o);
    }
  } else if (Object.prototype.toString.call(o) === '[object Array]') {
    for (var i= 0, l = o.length; i<l; i++) {
      if (!isNaN(o[i])) {
        o[i] = parseFloat(o[i]);
      }
    }
  } else if (typeof o === "object") {
    for (var k in o) {
      if (!isNaN(o[k])) {
        o[k] = parseFloat(o[k]);
      }
    }
  }
  return o;
}