[Functional Programming] Examples: When and Unless
/**
* When
*/ const _branch = (x) => {
const result = (x && x.isPublic) ?
dissoc('private', x) : x; console.log(result);
return assoc('result', 'done', result);
} const handlePublic = when(
propEq('isPublic', true),
dissoc('private')
);
const assignDone = assoc('result', 'done');
const branch = compose(
assignDone,
handlePublic
); /**Unless */
const _isDefaultArray = (x) => {
const result = !isArray(x) ?
[] :
x; return result.map(wrap => ({wrap}))
} const isDefaultArray = compose(
map(objOf('wrap')),
unless(
isArray,
constant([])
)
) log(
isDefaultArray([10,11,12,13])
)
[Functional Programming] Examples: When and Unless的更多相关文章
- BETTER SUPPORT FOR FUNCTIONAL PROGRAMMING IN ANGULAR 2
In this blog post I will talk about the changes coming in Angular 2 that will improve its support fo ...
- Beginning Scala study note(4) Functional Programming in Scala
1. Functional programming treats computation as the evaluation of mathematical and avoids state and ...
- Functional Programming without Lambda - Part 2 Lifting, Functor, Monad
Lifting Now, let's review map from another perspective. map :: (T -> R) -> [T] -> [R] accep ...
- Functional Programming without Lambda - Part 1 Functional Composition
Functions in Java Prior to the introduction of Lambda Expressions feature in version 8, Java had lon ...
- a primary example for Functional programming in javascript
background In pursuit of a real-world application, let’s say we need an e-commerce web applicationfo ...
- Functional programming
In computer science, functional programming is a programming paradigm, a style of building the struc ...
- Java 中的函数式编程(Functional Programming):Lambda 初识
Java 8 发布带来的一个主要特性就是对函数式编程的支持. 而 Lambda 表达式就是一个新的并且很重要的一个概念. 它提供了一个简单并且很简洁的编码方式. 首先从几个简单的 Lambda 表达式 ...
- Functional programming idiom
A functional programming function is like a mathematical function, which produces an output that typ ...
- 关于函数式编程(Functional Programming)
初学函数式编程,相信很多程序员兄弟们对于这个名字熟悉又陌生.函数,对于程序员来说并不陌生,编程对于程序员来说也并不陌生,但是函数式编程语言(Functional Programming languag ...
随机推荐
- 【Python】【demo实验6】【练习实例】【奖金发放计算(阶梯)】
题目: 企业发放的奖金根据利润提成.利润(I)低于或等于10万元时,奖金可提10%:利润高于10万元,低于20万元时,低于10万元的部分按10%提成,高于10万元的部分,可提成7.5%:20万到40万 ...
- centos git clone 报错 fatal: HTTP request failed 解决办法
git clone报错提示 git clone https://github.com/xxxx.git Initialized empty Git repository in /root/xxxx/. ...
- 基于 CentOS 7 搭建 GitLab
⒈更新软件包 yum update -y ⒉安装 ssh服务并启动 yum install -y curl policycoreutils-python openssh-server systemct ...
- PAT B1023 组个最小数(20)
题目描述 给定数字 0-9 各若干个.你可以以任意顺序排列这些数字,但必须全部使用.目标是使得最后得到的数尽可能小(注意 0 不能做首位).例如:给定两个 0,两个 1,三个 5,一个 8,我们得到的 ...
- java的Thread Dump诊断工具
1.1什么是Thread Dump? Thread Dump是非常有用的诊断Java应用问题的工具.每一个Java虚拟机都有及时生成所有线程在某一点状态的thread-dump的能力,虽然各个 Jav ...
- url协议+域名+端口号
string url = System.Web.HttpContext.Current.Request.Url.Scheme + "://" + ...
- O035、Nova Suspend / Rescue 操作详解
参考https://www.cnblogs.com/CloudMan6/p/5503501.html Suspend / Resume 有时候需要长时间暂停 instance , 可以通过 S ...
- Databus&canal对比
Databus和canal都能够提供实时从数据库获取变更,并提供给下游的实时消费流的功能. 本文针对两个系统实现和应用上的不同点,做了一个简单的对比: 对比项 Databus canal 结论 支持的 ...
- eclipse中svn从分支合并到主干及冲突解决
https://blog.csdn.net/shengqianfeng/article/details/79203156
- Win10 OpenCV3.3.0+VS2013配置大坑,OpenCV解决方案编译报错“找不到python36_d.lib”错误
今天因为想要用OpenCV做图像识别,小白一个,在网上找到一个教程,但是需要配置OpenCV3.3.0的环境,于是又在网上找OpenCV3.3.0+VS2013(因为我之前已经安过了VS2013),前 ...