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I searched in Google to find the differences between a case class and a class. Everyone mentions that when you want to do pattern matching on the class, use case class. Otherwise use classes and also mentioning some extra perks like equals and hash code overriding. But are these the only reasons why one should use a case class instead of class?
I guess there should be some very important reason for this feature in Scala. What is the explanation or is there a resource to learn more about the Scala case classes from?
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A case class has all of the functionality of a regular class, and more. When the compiler sees the case keyword in front of a class , it generates code for you, with the following benefits: Case class constructor parameters are public val fields by default, so accessor methods are generated for each parameter.
The Scala interface for Spark SQL supports automatically converting an RDD containing case classes to a DataFrame. The case class defines the schema of the table. The names of the arguments to the case class are read using reflection and they become the names of the columns.
A Case Class is just like a regular class, which has a feature for modeling unchangeable data. It is also constructive in pattern matching.
What is Scala Case Class? A Scala Case Class is like a regular class, except it is good for modeling immutable data. It also serves useful in pattern matching, such a class has a default apply() method which handles object construction. A scala case class also has all vals, which means they are immutable.
Case classes can be seen as plain and immutable data-holding objects that should exclusively depend on their constructor arguments.
This functional concept allows us to
Node(1, Leaf(2), None)))In combination with inheritance, case classes are used to mimic algebraic datatypes.
If an object performs stateful computations on the inside or exhibits other kinds of complex behaviour, it should be an ordinary class.
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