Question

以下是我存储在名为 arrayEV 的数组中的数据结构我很确定我可以通过顶部数组中的eventname进行过滤。但是我不确定如何通过子阵列[heatlane]中的东西来过滤数组，所以我只想在[heatlane]

中的某些条件满足条件时显示主arrayEV

struct events {
    var eventnumber:Int
    var eventname:String
    var swimmers:[heatlane]?
}

struct heatlane{
    var heat:Int
    var lane:Int
    var age:Int
    var swimmer:String
    var team:String
    var seedTime:String
    var finalsTime:String
}

Answer 1

通过简单属性（如array ( 0 => '2-0', 1 => '4-0', 2 => '4-1', 3 => '4-10', 4 => '4-11', 5 => '4-12', 6 => '4-13', 7 => '4-14', 8 => '4-15', 9 => '4-16', 10 => '4-2', 11 => '4-3', 12 => '4-4', 13 => '4-5', 14 => '4-6', 15 => '4-7', 16 => '4-8', 17 => '4-9', 18 => '5-0', 19 => '7-1', 20 => '8-0', 21 => '9-0', )）或更复杂的属性（如Int或其他）进行过滤的方法没有区别。您应该只传递应该过滤元素的条件。

如果您想过滤事件并且只有这些事件的名称以“A”开头，那么您可以写下：

Array

如果你想过滤那些名字以“A”为前缀的游泳运动员你会写的事件：

let prefixedWithA = events.filter{ $0.eventname.hasPrefix("A") }

Answer 2

使用Array.filter ..

var array: [Any] = []
var heatlaneArr: [heatlane] = []
array.append(heatlaneArr)

像这样过滤数组，检查数组的每个数组元素

let findHeatlaneArray = array.filter { (obj) -> Bool in
   return ((obj as? [heatlane]) != nil)
}

Answer 3

let resultFilter = arrayEV.filter { (events) -> Bool in
        guard let swimmers = events.swimmers else { return false } // check  swimmers not nil
        let result = swimmers.filter({ $0.age == 1}) // age condition
        return result.count ==  0 ? false : true
    }

如何通过包含为结构值的数组进行过滤

3 个答案: