David Roberts DDR0

## Polymorphism.md

      
              1 file
            
          
              2 forks
            
          
              2 comments
            
          
              20 stars
            
          
                BalmungSan
                / Polymorphism.md
            
            
              Last active
              January 7, 2024 18:41
            
              
                Polymorphism in Scala.
              
          
    Polymorphism in Scala.

This document aims to show and compare three alternatives
for achieving polymorphism in Scala.

Subtyping, common in object-oriented languages like Java.
Duck typing, common in dynamically typed languages like Python.
Typeclasses, common in functional languages like Haskell.

Additionally, when implementing the typeclass pattern in Scala,

  
## plotsweeper.py
#MineSweeper variant #10841
#For Python 3
import random, os

## {{{ http://code.activestate.com/recipes/134892/ (r2)
class _Getch:
    """Gets a single character from standard input.  Does not echo to the
screen."""
    def __init__(self):
        try:
	#MineSweeper variant #10841
	#For Python 3
	import random, os

	## {{{ http://code.activestate.com/recipes/134892/ (r2)
	class _Getch:
	"""Gets a single character from standard input. Does not echo to the
	screen."""
	def __init__(self):
	try: