https://en.wikipedia.org/wiki/Pure_function https://en.wikipedia.org/wiki/Side_effect_(computer_science) https://reactjs.org/docs/hooks-effect.html https://www.yld.io/blog/the-not-so-scary-guide-to-functional-programming/
/** * fn是纯函数 */ export function cached(fn) { const cache = Object.create(null) return function cachedFn(str) { const hit = cache[str] return hit || (cache[str] = fn(str)) } } /** * 实例 */ export const capitalize = cached((str) => { return str.charAt(0).toUpperCase...
Apurely functional function has no side effects. A purely functional programming language would not allow functions with side effects to be defined. But wait, there's more! Because functions and algorithms cannot have side effects, variables are immutable and persistent. This persistence is not the...
Pure functions are the base offunctional programming. I encourage you to explore the popular functional programming libraryRamda, which uses extensively the composition of pure functions. 3. Impure functions A function that can return different values given the same arguments or makes side effects is ...
(来自:http://en.wikipedia.org/wiki/Pure_function) 在计算机编程中,假如满足下面这两个句子的约束,一个函数可能被描述为一个纯函数: 给出同样的参数值,该函数总是求出同样的结果。该函数结果值不依赖任何隐藏信息或程序执行处理可能改变的状态或在程序的两个不同的执行,也不能依赖来自I/O装置的任何外部的输入...
where >>= is FIO's bind function. Benchmarks This repository contains five benchmarks that each test an aspect of concurrent computing. All benchmarks reside from the Savina - An Actor Benchmark Suite paper. Pingpong (Message sending and retrieval) ThreadRing (Message sending and retrieval, ...
public interface Invariant<F> { <A, B> Kind<F, B> imap(Kind<F, A> value, Function1<A, B> map, Function1<B, A> comap); }Contravariantpublic interface Contravariant<F> extends Invariant<F> { <A, B> Kind<F, B> contramap(Kind<F, A> value, Function1<B, A> map); }...
Enroll in Intellipaat’s C Programming Certification Course to become an expert. What is a Pure Virtual Function? As discussed in the above section, a pure virtual function does not have a definition in the class it has been declared in. In other words, it is a virtual function without a...
A pure function doesn't have any side-effects. The benefits of writing pure functions are: · If we write functions that don't have side-effects, then we can use them whenever and wherever we want to when composing our queries. Pure functions lead to composability. · Testing is easy. ...
Let’s look at a function that is not pure.async function increment() { let number = await repo.getNumberFromDatabase(); number += 1; await repo.setNumberInDatabase(number); return number; } This is not pure because it fetches data from a database. The result will vary based on ...