Pattern Matching

Scala has a built-in general pattern matching mechanism It allows to match on any sort of data with a first-match policy — —

• Here is a second example which matches a value against patterns of different types: —

  Enumeration

• Enumeration allows programmer to define their own data type
• Often we have a variable that can take one of several values. For instance, a WeekDays field of an object could be either Mon, Tue, Wed, or Thu —

  Enumeration (cont’d)

• Another way
• Gives Error if value is not found