Lambda
Domain: Programming Fundamentals
🎯 Motivation
Sometimes you need a tiny function without bothering to name it - lambda creates anonymous functions.
📋 Concrete Example
sorted(names, key=lambda x: len(x)) sorts names by length. The lambda is a mini function: takes x, returns len(x).
🔗 Analogy
A disposable cup - you use it once for a specific purpose (sorting, filtering) and throw it away. No need to give it a name or wash it.