AngularJS 监听变量变化 》

var timeout;
$scope.$watch('search.subj',function (newVal,@H_301_23@oldVal) {
    if (newVal !== @H_301_23@oldVal) {
        if (timeout) $timeout.cancel(timeout);
        timeout = $timeout(function() {
            $scope.doSearch();
        },800);
    }
},true);