How to convert dictionary to array

Question

I want to convert my dictionary to an array, by showing each [String : Int] of the dictionary as a string in the array.

For example:     

var myDict: [String : Int] = ["attack" : 1, "defend" : 5, "block" : 12] 

     I'm aware of myDict.keys.array and myDict.values.array, but I want them to show up in an array together. Here's what I mean:     

var myDictConvertedToArray = ["attack 1", "defend 5", "block 12"] 

Thanks in advance.

Answer 1

You can use a for loop to iterate through the dictionary key/value pairs to construct your array:

var myDict: [String : Int] = ["attack" : 1, "defend" : 5, "block" : 12]  var arr = [String]()  for (key, value) in myDict {     arr.append("\(key) \(value)") } 

Note: Dictionaries are unordered, so the order of your array might not be what you expect.

---

In Swift 2 and later, this also can be done with map:

let arr = myDict.map { "\($0) \($1)" } 

This can also be written as:

let arr = myDict.map { "\($0.key) \($0.value)" } 

which is clearer if not as short.

Answer 2

The general case for creating an array out of ONLY VALUES of a dictionary in Swift 3 is (I assume it also works in older versions of swift):

let arrayFromDic = Array(dic.values.map{ $0 }) 

Example:

let dic = ["1":"a", "2":"b","3":"c"]  let ps = Array(dic.values.map{ $0 })  print("\(ps)")  for p in ps {     print("\(p)") }