javascript - AngularJs 通过另一个数组过滤一个数组

Question

我在 Controller 中有三个数组:

1. $scope.allUsers 包含 :id 和 :name 的所有用户。例如。类似this .
2. $scope.job.delegate_to 包含与作业委派相关的信息。看起来像这样。

    $scope.job.delegated_to = [
      {id: 5, user_id:33, user_name:"Warren", hour_count:4},
      {id: 5, user_id:18, user_name:"Kelley", hour_count:2},
      {id: 5, user_id:10, user_name:"Olson", hour_count:40},
      {id: 5, user_id:42, user_name:"Elma", hour_count:2},
      {id: 5, user_id:45, user_name:"Haley", hour_count:4},
      {id: 5, user_id:11, user_name:"Kathie", hour_count:3}
     ]

$scope.freeUsers 必须包含所有用户，而不是委派给作业。

我添加了 watch

$scope.$watch('job.delegated_to.length', function(){
  $scope.freeUsers = filterUsers( $scope.allUsers, $scope.job.delegated_to );
});

但无法构造一个有效的过滤器。

Answer 1

你的filterUsers函数将是这样的:

var filterUsers = function(allUsers, jobs) {
    var freeUsers = allUsers.slice(0); //clone allUsers
    var jobUserIds = [];
    for(var ind in jobs) jobUserIds.push(jobs[ind].user_id);
    var len = freeUsers.length;
    while(len--){
      if(jobUserIds.indexOf(allUsers[len].id) != -1)  freeUsers.splice(len, 1);
    }    
    return freeUsers;
}

结账 fiddle http://jsfiddle.net/cQXBv/