How to use jQuery.map

HTML

<div>
  <input type="text" />
  <input type="text" />
  <input type="text" />
</div>
<input type="button" value="Click me" />

JavaScript

$(function() {
  $(":button").click(function() {
    var cells = $.map($("div").find("input"), function(n, i) {
      return $(n).val();
    });
    console.log(cells);
    var t = eval(cells.join("+"));
    console.log("t=" + t);

  });
});