Swift Struct and Class Difference

Struct Value type Copied when passed or assigned Copy on write Functional programming No inheritance “Free” init initializes ALL vars Mutability must be explicitly stated Your “go-to” data structure Class Reference type Passed around via pointers Automatically reference counted Object-oriented programming Inheritance (single) “Free” init initializes NO vars Always mutable Used in specific circumstances The… Read More Swift Struct and Class Difference

Swift – Solving Fatal error: Unresolved error Foundation._GenericObjCError.nilError, [:]

You are likely to get this error on CoreData when trying to update the manageObjectContext in the init() of your struct. I was trying calling a function that saves the context upon navigating to a new view from the initializer. A better approach instead is when the view has been rendered use the .onAppear(perform:) modifier… Read More Swift – Solving Fatal error: Unresolved error Foundation._GenericObjCError.nilError, [:]

Swift Basic Operators

On this lesson, we will break down operators. An operator is a special symbol or phrase that we can use to check, change or combine values. Terminology Operators are unary (single target), binary( two targets) or ternary(three targets). The values that operators affect are called operands. Assignment Operators We already used this when we were… Read More Swift Basic Operators