Scala Companion Object-A Deep Dive
Briefly

In Scala, a companion object enhances encapsulation as it can access the private members of its corresponding class, fostering tighter code interrelationship.
A companion object serves as a singleton and can define factory methods that aid in more controlled object creation, thereby improving flexibility in instantiation.
By enabling shared access to private members, companion objects not only streamline interaction between a class and its static context but also facilitate organized utility methods.
Scala's design of companion objects allows developers to encapsulate related functionality and leverage the power of object-oriented and functional programming.
Read at Medium
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