根据匹配

Question

我想使用status密钥将所有任务列表数据过滤为打开和已关闭任务列表

var data = [{
  "createdOn": "Created on Jan 07, 2017",
  "taskList": [{
    "task": "Meeting with Jason",
    "status": "closed",
  },
  {
    "task": "Meeting with Ram",
    "status": "open",
  },
  ]
},
{
  "createdOn": "Created on Jan 08, 2017",
  "taskList": [{
    "task": "Meeting with Mike",
    "status": "open",
  },
  {
    "task": "Meeting with Smith",
    "status": "closed",
  },
  ]
}
];

我试过这个：

console.log(_.filter(data, { taskList: [ { status: "open" } ]}));

实际结果：

根据数据，TaskList数组在1月7日和1月08日包含2个开放状态。但是我得到了一个完整的taskList数组。

0:{createdOn: "Created on Jan 07, 2017", taskList: Array(2)}
1:{createdOn: "Created on Jan 08, 2017", taskList: Array(2)}

预期结果：

0:{createdOn: "Created on Jan 07, 2017", taskList: "taskList": [{
    "task": "Meeting with Ram",
    "status": "open",
  }} 
1:{createdOn: "Created on Jan 08, 2017", taskList: "taskList": [{
    "task": "Meeting with Mike",
    "status": "open",
  }}

Answer 1

您的filter错了。

＆＃13;

＆＃13;

var data = [{
  "createdOn": "Created on Jan 07, 2017",
  "taskList": [{
    "task": "Meeting with Jason",
    "status": "closed",
  },
  {
    "task": "Meeting with Ram",
    "status": "open",
  },
  ]
},
{
  "createdOn": "Created on Jan 08, 2017",
  "taskList": [{
    "task": "Meeting with Mike",
    "status": "open",
  },
  {
    "task": "Meeting with Smith",
    "status": "closed",
  },
  ]
}
];
var newArray = data.filter(function (el) {
  el.taskList = el.taskList.filter(function(item)
  {
		return item.status == "open";
  });
  return el;
});
console.log(newArray);

＆＃13;

＆＃13;

＆＃13;

Answer 2

如果您想要包含status='open'的过滤条件，那么您的过滤器就可以了。如果要返回修改过的对象，那就是另一个故事。这是ECMAS6 lodash / vanilla：

// lodash
console.log(_.map(data, o => o.taskList = _.filter(o.taskList, { 'status': 'open' })));

// vanilla
console.log(data.map(o => o.taskList = o.taskList.filter(t => t.status == 'open')))

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>
<script>
var data = [{
  "createdOn": "Created on Jan 07, 2017",
  "taskList": [{
    "task": "Meeting with Jason",
    "status": "closed",
  },
  {
    "task": "Meeting with Ram",
    "status": "open",
  },
  ]
},
{
  "createdOn": "Created on Jan 08, 2017",
  "taskList": [{
    "task": "Meeting with Mike",
    "status": "open",
  },
  {
    "task": "Meeting with Smith",
    "status": "closed",
  },
  ]
}
];
</script>