Most of the functions offered by the ramda library are curried by default. Functions you've created or that you've pulled in from another library may not be curried. Ramda's curry and curryN functions allow you to take a non-curried function and use…

In this lesson, we'll look at how we can use Ramda's invoker and constructNfunctions to take methods of an object and turn them into reusable utility functions that are curried and accept their object as the last argument. We'll convert a dot-chained…

In this lesson we'll take some existing code and refactor it using some functions from the Ramda library, most notably, compose and converge. When we're done, we'll have taken a function with a couple of local variables and parameter references and c…

const curry = R.curry((fns, ary) => R.ap(fns, ary)); ), R.add()]); ,,]); console.log(res); //[2, 4, 6, 4, 5, 6] const compose = R.compose( R.reverse, R.ap([R.multiply(), R.add()]) ); ,,]); console.log(res1); //[6, 5, 4, 6, 4, 2] , x)) const pipe = R.…

Ramda 基本的数据结构都是原生 JavaScript 对象,我们常用的集合是 JavaScript 的数组.Ramda 还保留了许多其他原生 JavaScript 特性,例如,函数是具有属性的对象. 今天我来说说javascript函数式的方法库--Ramda.Ramda主要特性如下: Ramda 强调更加纯粹的函数式风格.数据不变性和函数无副作用是其核心设计理念.这可以帮助你使用简洁.优雅的代码来完成工作. Ramda 函数本身都是自动柯里化的.这可以让你在只提供部分参数的情况下,轻松地在…

Monads allow you to nest computations. They are a pointed functor that adds mjoin and chain functions to combine other functors. Brian shows a number of code examples of different monads in action. functions: "mjoin", "chain" mjoin: va…

Well, this stuff will be a little bit strange if you deal with it first time. Container Object: Just a wrapper / contianer for values No Method No Nouns var _Container = function(val){ this.val = val; } var Container = function(x){ return new _Contai…

In this lesson, we’ll use a Maybe to safely operate on properties of an object that could be undefined. We’ll use our initial code as the basis for a prop utility function that can be reused with different objects and various property names. Instead…

本文首发于 vivo互联网技术 微信公众号 链接:https://mp.weixin.qq.com/s/ZoXYbjuezOWgNyJKmSQmTw作者:杨昆 [编写高质量函数系列],往期精彩内容: <如何编写高质量的 JS 函数(1) -- 敲山震虎篇>介绍了函数的执行机制,此篇将会从函数的命名.注释和鲁棒性方面,阐述如何通过 JavaScript 编写高质量的函数. <如何编写高质量的 JS 函数(2)-- 命名/注释/鲁棒篇>从函数的命名.注释和鲁棒性方面,阐述如何通过 Ja…

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