$(document).ready(() => {
  $(function() {
    $('.item').draggable({
      cursor: "crosshair",
      cursorAt: {
        left: 5
      },
      distance: 10,
      opacity: 0.75,
      revert: true,
      snap: ".target",
      containment: "window"
    });
  });

  $(function() {
    var array = [];
    var arraytext = '';
    $('.target').droppable({
      accept: ".item",
      tolerance: 'pointer',
      activeClass: 'active',
      hoverClass: 'highlight',
      drop: function(event, ui) {
        var dropped = $(this);
        var dragged = $(ui.draggable);
        $(function(index, item) {
          var test = '';
          array.push($(dragged).text());
          arraytext = JSON.stringify(array);
          test += "Index Value = " + $(dropped).index() + ", Text = " + $(dragged).text() + "<br/>";
          $('#test').html(test);
          $('#array').text(arraytext);
        });
      }
    });
  });
});

#container {
  border: solid black 1px;
  margin: 0 auto;
  height: 800px;
}

#gridview {
  border: 2px solid #292da0;
  border-radius: 5px;
  background-color: #7577a3;
  display: grid;
  grid-template-columns: repeat(auto-fit, 100px);
  grid-template-rows: auto;
  margin-left: 105px;
}

.target {
  border: 2px solid #1c1c3a;
  border-radius: 5px;
  background-color: #a7a7ef;
  padding: 1em;
}

#flex {
  border: 2px solid #292da0;
  border-radius: 5px;
  width: 100px;
  background-color: #7577a3;
  display: flex;
  flex-flow: column wrap;
  justify-content: flex-end;
  float: left;
}

.item {
  border: 2px solid #1c1c3a;
  border-radius: 5px;
  background-color: #a7a7ef;
  padding: 1em;
}

.active {
  background-color: blue;
  color: white;
  border: 2px solid black;
}

.highlight {
  background-color: yellow;
  color: black;
  border: 2px solid blue;
}

.table {
  border: solid black 1px;
  width: 86px;
  padding: 5px;
}

<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.0/jquery-ui.min.js"></script>
<div id="container">
  Test:
  <div id="test">
  </div>
  Array:
  <div id="array">
  </div>
  <div id="gridview">
    <div class="target">Headers</div>
    <div class="target">with</div>
    <div class="target">different</div>
    <div class="target">column</div>
    <div class="target">names</div>
  </div>
  <span>
  <div id="flex">
    <div class="item">First Name</div>
    <div class="item">Last Name</div>
    <div class="item">Code</div>
    <div class="item">Date</div>
    <div class="item">Amount</div>
  </div>
   <table>
     <thead>
       <tr>
         <td class="table">Some</td>
         <td class="table">Column</td>
         <td class="table">Data</td>
         <td class="table">Goes</td>
         <td class="table">Here</td>
         </tr>
     </thead>
       <tr>
         <td class="table">Other Data</td>
         <td class="table">Other Data</td>
         <td class="table">Other Data</td>
         <td class="table">Other Data</td>
         <td class="table">Other Data</td>
       </tr>
   </table>
  </span>
</div>