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@andy2046

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2019-01-29 04:37

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[React] Redux 源码解读

[React] Redux 源码解读

介绍我们一起来研究下当前最流行的React状态管理容器Redux，本文基于Redux v3.7.2 ，Redux用一个单独的状态树对象（state tree object）保存整个应用的状态，这个对象不能直接被改变（immutable），当数据变化了，一个新的对象就会被创建（通过actions和reducers） Redux有如下优点：可预测始终有一个唯一的准确的数据源（single source

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Node.js进阶666 等级考试

Node.js进阶666 等级考试

Node.js challenge 四级 What is the relationship between Node.js and V8? Can Node work without V8? How come when you declare a global variable in any Node.js file it’s not really global to all modules? When

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Kubernetes API reference

Kubernetes API reference

v1.10 Container Pod Service Deployment Ingress Job CronJob NetworkPolicy

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Kubernetes cheat sheet

Kubernetes cheat sheet

Cluster Introspection kubectl get services # List all services kubectl get pods # List all pods kubectl get nodes -w # Watch nodes continuously kubectl version # Get version information kubectl cluster-info

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Tail Call Optimization in JavaScript

Tail Call Optimization in JavaScript

[JavaScript] 尾调用优化 Tail Call Optimization 介绍现在函数式编程越来越流行，有时我们会选择用recursion递归来写逻辑，这样代码容易懂而且也可以避免一些side-effects副作用，但是，但是，JavaScript并不支持尾递归调用举个栗子🌰，下面👇代码会出错 var sum = function(x, y) { if (y > 0) {

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Variable Object in JavaScript

Variable Object in JavaScript

[JavaScript] 变量对象 Variable Object 介绍本文中，我们将分析与ECMAScript执行上下文相关的概念变量对象 Variable Object 先举个栗子🌰，为什么a b x表现大不相同，当引用一个函数或者变量时，解释器是如何以及从哪里找到它们的呢 alert(a); // undefined alert(b); // "b" is not defined

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Execution Context in JavaScript

Execution Context in JavaScript

[JavaScript] 执行上下文 Execution Context 介绍本文中，我们将分析ECMAScript的执行上下文以及相关的可执行代码的类型先举个栗子🌰，为什么a和b表现大不相同，当引用一个函数或者变量时，解释器是如何以及从哪里找到它们的呢 b(); // Called b console.log(a); // undefined var a = "Hello

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Scope Chain in JavaScript

Scope Chain in JavaScript

[JavaScript] 作用域链 Scope Chain 介绍在变量对象中已经介绍过，执行上下文（变量，函数声明和函数形式参数）的数据被存储为变量对象的属性此外，我们知道每次进入上下文时都会创建变量对象并填充初始值，并且它的更新发生在代码执行阶段举个栗子🌰 function test(a, b) { console.log(c); // function c() {} var c = 10;

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this in JavaScript

this in JavaScript

[JavaScript] 令人迷惑的《this》介绍本文将讨论一个与执行上下文密切相关的细节 => this关键字实践证明，理解this难度较大，并且经常会导致在不同的执行环境中错误滴确定this值的问题举着栗子🌰： var a = 'global'; function foo () { console.log(this.a); } var obj = { a: 2, foo: foo