Question

我有一个存储在字典字典中的帐户数量，我想计算现有帐户的数量，所以基本上是“.count”，但要查找创建的字典数量。

var dictionary: [String : [ String ]] = ["" : []]
let storeString = "StoreString"

func addUpdateArray(strings: [String], index: Int) {
 let locator = storeString + index.description
 dictionary[locator] = strings
}

addUpdateArray(["Account1", "Hy"], 1)
addUpdateArray(["Account2", "Hey"], 3)

现在我想看看有多少帐户创建了这种类字典，是不是一种方式？

Answer 1

这样的东西？

var accounts = [String:[String:String]]() // or whatever your structure is

accounts["Edmund"] = [
    "amount": "23.87",
    "curreny": "dollars"
]

accounts["Baldrick"] = [
    "amount": "23.87",
    "curreny": "dollars"
]

accounts["Percy"] = [
    "amount": "87.00",
    "curreny": "peso"
]

println(accounts.keys.array.count) // 3

Answer 2

如果您有词典词典，并且想要计算内部实际值的数量，可以这样做：

var accounts = [
    "accountsGroup1" : ["account1", "account2", "account3", "account4"],
    "accountsGroup2" : ["account1", "account2"],
    "accountsGroup3" : ["account1", "account2", "account3", "account4"]
]

let accountsCount = accounts.values.map { $0.count }
let numberOfAllAccounts = reduce(accountsCount, 0) { $0 + $1 }

println(numberOfAllAccounts)

在swift中计算字典中的字典数

2 个答案: