if-statements can add serious complexity and beg for refactoring. You can use polymorphic functions to simplify your ifs and dynamically call the appropriate method. For example you have the code like: function charge(){ if(this.moive.type==="regular…

1. 介绍 第一眼看到ES6新增加的 arrow function 时,感觉非常像 lambda 表达式. 那么arrow function是干什么的呢?可以看作为匿名函数的简写方式. 如: var addition = function(a, b) { return a + b }; // 等同 var addition = (a, b) => { return a + b }; 2. 语法 arrow functions(箭头函数)主要有以下4种语法: // 1)基本 (param1, pa…

In this lesson you will create a utility function that allows you to quickly compose behavior of multiple functions to create new behavior. By the end, you will have successfully created a tremendously popular helper function that is used in JavaScri…

索引 Notes 高阶函数 forEach filter map reduce some findIndex 重写课本示例代码 Excercises Flattening Your own loop Everything Dominant writing direction Notes 1.高阶函数的概念:Functions that operate on other functions, either by taking them as arguments or by returning th…

We can dot-chain our way to great success with an instance of Maybe, but there are probably cases where you need to apply the same series of transformations against different Maybes. In this lesson, we’ll look at some point-free versions of some comm…

This can be handy if you have a rate limit on API requests or if you need to pass the result of each promise to the next one. function fetchMessages(username) { return fetch(`https://example.com/api/messages/${username}`) .then(response => response.j…

FusionCharts JavaScript API - Functions Home > FusionCharts XT and JavaScript > API Reference > Functions (官方文档的位置) 返回对图表对象的引用 FusionCharts(chartId: string); var chartReference =FusionCharts("myChartId"); render图标到DOM元素 详细的的参数可以看官方文档 Fu…

用面试题,复习一下,js基础. 1.综合题 function Foo() { getName = function () { alert (1); }; return this; } Foo.getName = function () { alert (2);}; Foo.prototype.getName = function () { alert (3);}; var getName = function () { alert (4);}; function getName() { aler…

转载:http://blog.csdn.net/foruok/article/details/50573612 转载:http://blog.csdn.net/foruok/article/details/50584985 转载:https://github.com/fanfeilong/cefutil/blob/master/doc/CEF_JavaScript_Cpp.md JS与Native代码交互,是在Render进程中,所以我们要实现CefRenderProcessHandler接口…

第1题 ["1", "2", "3"].map(parseInt) 知识点: Array/map Number/parseInt JavaScript parseInt 首先, map接受两个参数, 一个回调函数 callback, 一个回调函数的this值 其中回调函数接受三个参数 currentValue, index, arrary; 而题目中, map只传入了回调函数--parseInt. 其次, parseInt 只接受两个两个参数 s…