Topic Prefer Immutability
Git sample
  • Most of the mainstream languages, including object-oriented programming languages such as C#, Visual Basic, C++, and Java, were designed to primarily support Imperative (procedural) Programming
  • Imperative code tends to be made of statements, not expressions
  • Objects are created with an initial state. Then statements are executed that Mutate or Change the state of an object
  • Immutability, in programming, refers to the unchanging state of objects after construction. Scala prefers immutability in design, making it the default in many cases
  • Defining a variable as a val means that it’s an Immutable reference
  • All method parameters are Immutable references and class arguments default to being Immutable references
  • The only way to create a mutable variable is through the var syntax

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