Question

我有这样的字典

seconds | healthy | events
   0    |    ✔    |   * liveness probe healthy
   1    |    ✔    |   - SIGTERM
   2    |    ✔    |   
   3    |    ✔    |   
   4    |    ✔    |   
   5    |    ✔    |   * liveness probe unhealthy (1/3)
   6    |    ✔    |   
   7    |    ✔    |   
   8    |    ✔    |   
   9    |    ✔    |   
   10   |    ✔    |   * liveness probe unhealthy (2/3)
   11   |    ✔    |   
   12   |    ✔    |   
   13   |    ✔    |   
   14   |    ✔    |   
   15   |    ✘    |   * liveness probe unhealthy (3/3)
   ..   |    ✔    |   * traffic is served       
   28   |    ✔    |   * traffic is served
   29   |    ✘    |   * pod restarts

我从另一个ViewController获得了student_id，因此我需要像这样附加它们。

var students = ["student_id":2,"present":0]

我如何实现这一目标

Answer 1

您无法在Swift中创建具有相同键名的字典。如果您尝试执行此操作，则每次都将替换student_id和present值。

相反，您可以创建如下的字典记录数组。

var students: [[String : Int]] = [["student_id": 2, "present": 0]]

let ids = [49,29,12,4]
let anotherRecords = ids.map { ["student_id": $0, "present": 0] }
students.append(contentsOf: anotherRecords)

print(students)

您得到了这样的输出。

  [["student_id": 2, "present": 0],
   ["student_id": 49, "present": 0], 
   ["present": 0, "student_id": 29],
   ["student_id": 12, "present": 0],
   ["present": 0, "student_id": 4]]

Answer 2

您不能在存储相同键“ student_id”的地方使用字典。 ID对于字典应该是唯一的。除了这个，你可以这样存储

var students =[2:0]
students[49] = 0
students[29] = 0
students[12]= 0
students[4]= 0

Answer 3

要首先将值附加到字典，您需要创建一个如下所示的字典然后在其中附加值

var students = [["student_id":2,"present":0]]
students.append(["student_id":49,"present":0])

如何在我的下面的代码中将值附加到字典

3 个答案: