Functional Programming in Practice
Functional Programming in Practice Functional programming (FP) asks you to build software from small, predictable parts. By using pure functions and data that does not change, you can reduce bugs and make behavior easier to understand. Core ideas are simple. Pure functions return the same result for the same inputs and have no side effects. Data is usually immutable, so a value never changes after it is created. Functions are first class: you can pass them as arguments, return them from other functions, or store them in variables. When small functions are combined, you get powerful behavior through composition. ...