July, 2019

Relational Databases and SQL

What is a Relational Database A Database is a collection of related data, and a Relational Database is a database that has “relations”. Where, formally, a relation is a subset of a cartesian product of sets. Informally, a relation is a “table” with rows and columns. Therefore, a “Relational Database” is a database that arranges... » read more

Designated Initializers vs Convenience Initializers (in Swift)

Initialization in Swift Initialization is the process of preparing an instance of a class, structure, or enumeration for use. This includes setting initial values for properties and performing any necessary setup. In Swift, initializers are special methods invoked to prepare an instance. Unlike Objective-C, Swift initializers don’t return a value. Their main purpose is to... » read more