Property in Swift - Computed property | Property Observers (WillSet & DidSet)

   Computed property -  Computed properties are part of a property type in Swift.  Stored properties are the most common which save and return a stored value  Computed properties calculate (rather than store) a value. A computed property provides a getter and an optional setter to indirectly access other properties and values. Computed property in swift is an interesting topic as you can write code inside a property in swift. Computed properties are provided by classes, structures, and enumerations but stored properties are provided only by classes and structures. This computed property swift tutorial has some tips on how to use the computed property in the right way and avoid the common mistakes that swift programming beginners do while computed property. Example :- Computed property A Calculate Simple Intrest struct CalculateLoan {      var amount : Int      var rate : Int      var years : Int      var simpleInterest: Int {          get {              return ( amount * rate
0

Subscripts - The Programming Language Swift


Subscripts - The Programming Language Swift

Subscripts:- 

Subscripts are used to access information from a collection , sequence and a list in classes, structured and enumeration without using any sequence method.

Or

These subscript are used to store and retrieve the value with the help of index without sequence method.

Syntax:-  Subscripts

subscript(<perameters>) -> <return type>{  
//getter 
get{ 
//subscript value declarations 
   }
  set(newValue){ // setter are optional
    //definition here
  }

Example:-  Subscripts

class yearsOfMonths {
  var months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]

subscript(index: Int) -> String{
      get {
            return months[index]]
              }
      set(newValue){
                self.months[index] = newValue
            }
        }
    }
    var yom = yearsOfMonths()
    print(yom[0])
    //Getter
    yom[0] = "December"
    //Setter
    print(yom[0])

Output:-  January
               December
  


Comments

Post a Comment