gistfile1.js

var original = [
  {
    "createDate":"Jun 19, 2015 11:27:07 AM",
    "flowName":"kostas",
    "sumAmount":255750,
    "charges":465
  },{
    "createDate":"Jun 19, 2015 11:27:07 AM",
    "flowName":"alex",
    "sumAmount":261288,
    "charges":481
  }
    ]

var target = [
  ["createDate", "flowName", "sumAmount", "charges"],
  ["Jun 19, 2015 11:27:07 AM", "kostas", 255750, 465],
  ["Jun 19, 2015 11:27:07 AM", "alex", 261288, 481]
  ]
  
  // sample try with Underscore
  var target = _.map(original, function(o){ return $.map(o, function(el) { return el; }); });