dictionary - How to combine two NSDictionary in Swift -

i beginner in swift , trying apprehend notion of dictionaries.

i have 2 nsdictionary both contain same keys, follow:

var currencyname: nsdictionary = [         "cny": "chinese yuan",         "pln": "polish zloty" ]  var rawrates nsdictionary = [         "cny": "1.34",         "pln": "1.456" ] 

i trying combine them 1 dictionary such as:

        ["cny": "chinese yuan","1.34"]         ["pln": "polish zloty","1.456"] 

i guess first question sort of variable should put output in ? can use nsdictionary ? reading documentation understanding nsdictionaries work pairs of key/values. possible put 2 values inside dictionary ?

my second question how should go combining 2 dictionaries, have tried use code below without success

for (currency, rawrate) in rawrates {                 (currencyid, name) in currencyname{                     if currency == currencyid {                         rawrates.append(name string)                     }                 }  } 

you can create dictionary of tuples follow:

let currencyname:[string:string] = ["cny": "chinese yuan", "pln": "polish zloty"] let rawrates:[string:string] = ["cny": "1.34", "pln": "1.456"]  var combineddictionary:[string:(name:string,rate:string)] = [:]   key in currencyname.keys.array {     combineddictionary[key] = (currencyname[key]!,rawrates[key]!) }   // testing  combineddictionary["pln"]!       // (.0 "polish zloty", .1 "1.456") combineddictionary["pln"]!.name  // "polish zloty" combineddictionary["pln"]!.rate  // "1.456"  combineddictionary["cny"]!       // (.0 "chinese yuan", .1 "1.34") combineddictionary["cny"]!.name  // "chinese yuan" combineddictionary["cny"]!.rate  // "1.34"