AngularJS Example:

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<div ng-app>
  <div ng-controller="TodoCtrl">      
      <ul>
        <li ng-repeat="item in fruits">
          {{item['fruit']}}
          <input type="checkbox" ng-model="item['selected']" />
        </li>
      </ul>

    <span>{{printFruits()}}</span>
  </div>
</div>

JavaScript

function TodoCtrl($scope) {
   $scope.fruits = [
  {'fruit': 'apple', 'selected': true},
  {'fruit': 'banana', 'selected': true},
  {'fruit': 'kiwi', 'selected': false}
];
    
    $scope.printFruits = function(){return JSON.stringify($scope.fruits);}
}