swift - 如何过滤类型字典中的值 [Type : [Type]]()

Question

我有一个包含多个值的字典，我想通过它过滤 nil 值。字典的类型是:

var dic = [Int: [String]]()

字典是:

var dic = [218: ["A", "B", "C",""],216: ["Q", "", "W",""]]

//remove the empty values
let filter = dic.filter({ !$0.value.isEmpty})
print(filter)

它返回与 nil 值相同的字典值，这些值应该被删除。

Answer 1

看来你需要从 "" 中过滤内部数组，它不是 nil 但代表一个空字符串你需要

let filter = dic.mapValues { $0.filter { $0 != "" } }