Skip to content

Latest commit

 

History

History
37 lines (23 loc) · 1.51 KB

miscellaneous_questions.md

File metadata and controls

37 lines (23 loc) · 1.51 KB
Raw

Miscellaneous Questions & Answers

Question: What is a named tuple?

In a tuple, we can provide names for each value. Using names, we can access the values by their names instead of an index.

Named tuples eliminate the need to remember indexes. For example,

let tupleWithoutNames = ("Simon", "New York City", 24)

// Access the name
print(tupleWithoutNames.0) // print "Simon"


let tupleWithNames = (name: "Simon", city: "New York City", age: 24)

// Access the name
print(tupleWithNames.name) // print "Simon"

### Question: What is the difference between classes and structs?
  • The difference between a class and a struct is whether it's a reference or a value. If you need to store some primitive data types (i.e. ​Ints, ​Floats​, ​Strings, etc.), use a ​struct​.
  • However, if you need custom behavior where passing by reference is preferred so that you refer to the same instance everywhere, use a class.
  • The other difference is that a ​class ​supports inheritance, while a struct doesn’t.

Note: Basically in Swift, a ​struct ​is preferred over a ​class.


### Question: What is the difference between static and class functions?
  • A static function can be associated with a type like a struct, class, or enum, while a class function is associated with a class type only.
  • Class functions can be overridden by subclasses, while static functions cannot be overridden.
  • Class functions can access the self properties of the class, which is not possible for static functions.