jbmilgrom

<input type="text" ng-model="modelName" nullify-model>

jbmilgrom

.directive('nullifyModel', ['$filter',
  function($filter){
    return {
      restrict: 'A',
      require: "ngModel",
      link: link
    };

    function link(scope, elem, attrs, ctrl){
      ctrl.$parsers.push($filter('nullify'));

jbmilgrom

.filter('nullify', function(){
  return function(value){
    return value ? value : null;
  };
});

jbmilgrom

<i class="icon upvote" ng-click="vm.user.upvote(vm.answer)"></i>

jbmilgrom

<i class="icon upvote"
  ng-click="vm.user.upvote(vm.answer)"
  ng-class="{voted: vm.answer.isVotedFor(vm.user)}">
</i>

jbmilgrom

<i class="icon upvote"
  ng-click="vm.user.upvote(vm.answer)"
  ng-class="{voted: vm.answer.isVotedFor(vm.user)}">
</i>
 {{ vm.answer.voteCount() }}
<i class="icon downvote"
  ng-click="vm.user.downvote(vm.answer)"
  ng-class="{voted: vm.answer.isVotedAgainst(vm.user)}">
</i>

jbmilgrom

scope.$watchGroup(['expression1', 'expression2'], function(arrayOfExpressions) {
  ...
});

jbmilgrom

var isVotedGroup = [
  'vm.answer.isVotedAgainst(vm.user)',
  'vm.answer.isVotedFor(vm.user)'
];

var unwatch = scope.$watchGroup(isVotedGroup, function(isVotedGroup) {
  var hasVoted = isVotedGroup.some(function(bool) {
    return bool;
  });
  if (hasVoted) {

jbmilgrom

var o = {iThink: ‘thereforeIAm’}; // memory allocated for an object and a string

jbmilgrom

var o = {iThink: ‘thereforeIAm’}; // memory allocated for an object and a string

o = ‘helloImANewString’;