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// calling 
    getProfileMode { (mode) in
            print("Mode : ", mode)
        }

func getProfileMode(completion: @escaping (String) -> Void) {
           // write firestore code here
            completion("true")
        }
    override func viewDidLoad() {
        // function calling
        querySomething { (completed) in
              print("completed :", completed)
        }
    }
    
    func querySomething(completion: @escaping (Bool) -> Void) {
        let db = Firestore.firestore()
        db.collection("collectionName").document().addSnapshotListener { (documentSnapshot, error) in
            if error != nil {
                completion(false)
                return
            }
            completion(true)
        }
    }
def byte_size(string):

  return(len(string.encode('utf-8')))

byte_size('😀’) # 4
byte_size('Hello World') # 11
#define a function 
 Def cube(num)
      #write the formula of cube
      return num*num*num
     #give the number to calculate the cube 
     cube(3)
   # print the cube of that number simply by using print command
    print(cube(3))
     “return” keyword means that function have to return          value
#define function
defall_unique(lst):

   return len(lst) == len(set(lst))
   
x = [1,1,2,2,3,2,3,4,5,6]


y = [1,2,3,4,5]


all_unique(x) # False
all_unique(y) # True
star

Thu Jun 09 2022 10:49:22 GMT+0000 (UTC)

#ios #swift #closure #return
star

Sat Apr 02 2022 04:49:10 GMT+0000 (UTC)

#ios #swift #return #completion
star

Mon Apr 20 2020 13:45:46 GMT+0000 (UTC) https://towardsdatascience.com/30-helpful-python-snippets-that-you-can-learn-in-30-seconds-or-less-69bb49204172

#python #python #function #bytesize #return
star

Mon Apr 20 2020 13:32:07 GMT+0000 (UTC) https://www.youtube.com/watch?v=rfscVS0vtbw&t=5s

#python #python #function #return
star

Tue Mar 31 2020 11:40:31 GMT+0000 (UTC) https://towardsdatascience.com/30-helpful-python-snippets-that-you-can-learn-in-30-seconds-or-less-69bb49204172

#python #python #function #return #allunique

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