Map
Domain: Programming Fundamentals
🎯 Motivation
Applying the same operation to every item in a collection is so common that map makes it a one-liner.
📋 Concrete Example
list(map(lambda x: x**2, [1,2,3])) gives [1, 4, 9]. Each element is squared.
🔗 Analogy
A factory assembly line - each item passes through the same machine (function), and comes out transformed.