![](/img/trans.png)
[英]Saving original order of keys in Dictionary by parsing JSONschema in Swift iOS
[英]Get keys of Dictionary in array in original order
假設我有一本字典
let dict = [
"Joe":"D.",
"Ben":"K.",
"Kyle":"R.",
"Matt":"L."
]
如果我想要此字典的鍵的數組,請執行以下操作:
let keys = Array(dict.keys)
但這會以隨機順序打印:
["Ben", "Joe", "Matt", "Kyle"]
有沒有辦法獲得與原始字典順序相同的鍵數組?
即
["Joe", "Ben", "Kyle", "Matt"]
字典沒有順序。 當我們向字典中添加新元素時,我們現在就不再訂購了。 您可以使用元組數組
let array = [("Joe", "D."), ("Ben", "K."), ("Kyle", "R.")]
print(array)
// [("Joe", "D."), ("Ben", "K."), ("Kyle", "R.")]
let keys = array.map { $0.0 }
print(keys)
// ["Joe", "Ben", "Kyle"]
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.