Question

我有这个数组：

[{
    "id": "5b221edea8abbc4194a62b90",
    "name": "Job one",
    "tasks": [{
        "id": "5b221edea8abbc4194a62b91",
        "name": "Task 2",
        "status": "finished",
      },
      {
        "id": "5b221edea8abbc4194a62b91",
        "name": "Task 3",
        "status": "pending",
      },
      {
        "id": "5b221edea8abbc4194a62b91",
        "name": "Task 3",
        "status": "to_do",
      },
    ]
  },
  {
    "id": "5b221edea8abbc4194a62b91",
    "name": "Job two",
    "tasks": [{
        "id": "5b221edea8abbc4194a62b96",
        "name": "Task 5",
        "status": "finished",
      },
      {
        "id": "5b221edea8abbc4194a62b97",
        "name": "Task 8",
        "status": "accepted",
      },
    ]
  },
]

所有任务都是进度条的100％。在这种情况下有5个任务。 100％= 5个任务。

我想知道进度条的百分比，根据任务是否具有“已完成”状态。在这种情况下，应该是（100 x 2）：5 = 40％在进度条中完成。

谢谢！

Answer 1

您只需使用嵌套的forEach来计算百分比。

尝试以下方法：

＆＃13;

var arr =  [{"id":"5b221edea8abbc4194a62b90","name":"Job one","tasks":[{"id":"5b221edea8abbc4194a62b91","name":"Task 2","status":"finished"},{"id":"5b221edea8abbc4194a62b91","name":"Task 3","status":"pending"},{"id":"5b221edea8abbc4194a62b91","name":"Task 3","status":"to_do"}]},{"id":"5b221edea8abbc4194a62b91","name":"Job two","tasks":[{"id":"5b221edea8abbc4194a62b96","name":"Task 5","status":"finished"},{"id":"5b221edea8abbc4194a62b97","name":"Task 8","status":"accepted"}]}];

var completedCount = 0;
var total = 0;
arr.forEach((o)=>{
  o.tasks.forEach((task) => {
    if(task.status == "finished")
      completedCount++;
     total++;
  });
});
var percentage  = (completedCount/total)*100;
console.log(percentage+"%");

＆＃13;

Answer 2

您可以使用concat和map展平数组。使用reduce获取感知。

let arr = [{"id":"5b221edea8abbc4194a62b90","name":"Job one","tasks":[{"id":"5b221edea8abbc4194a62b91","name":"Task 2","status":"finished"},{"id":"5b221edea8abbc4194a62b91","name":"Task 3","status":"pending"},{"id":"5b221edea8abbc4194a62b91","name":"Task 3","status":"to_do"}]},{"id":"5b221edea8abbc4194a62b91","name":"Job two","tasks":[{"id":"5b221edea8abbc4194a62b96","name":"Task 5","status":"finished"},{"id":"5b221edea8abbc4194a62b97","name":"Task 8","status":"accepted"}]}]

let result = [].concat(...arr.map(o => o.tasks)).reduce((c, {status}) => {
  if (status === "finished") c.finished++;
  c.total++;
  c.percentage = (c.finished / c.total) * 100;
  return c;
}, {finished: 0,total: 0,percentage: 0})

console.log(result);

使用javascript获取进度条的百分比的函数

2 个答案: