python-scala-functional

name	python-scala-functional
description	Mapping Python's functional tools to idiomatic Scala equivalents, including lambdas and collection methods.

Python to Scala Functional Programming

This skill focuses on functional patterns and collection transformations.

Lambdas and Functions

• Python: lambda x: x * 2
• Scala: (x: Int) => x * 2 or _ * 2 (placeholder syntax).

Collection Operations

Operation	Python	Scala
Map	map(f, items)	items.map(f)
Filter	filter(p, items)	items.filter(p)
Reduce	functools.reduce(f, items)	items.reduce(f)
For-each	for x in items: do(x)	items.foreach(do)
Zip	zip(a, b)	a.zip(b)
Sort	sorted(items, key=...)	items.sortBy(...)

Lazy Sequences

• Python: Generators (yield) and Iterator.
• Scala: LazyList, Iterator, or View.

Higher-Order Functions

Scala supports HOFs natively.

def applyFunc(f: Int => String, x: Int): String = f(x)

Pattern Matching (Instance Checks)

Instead of isinstance, use match for clean type dispatch.

value match {
  case s: String => "string"
  case i: Int    => "int"
  case _         => "unknown"
}