javascript algorithm visualization javascript算法可视化 https://algorithm-visualizer.org https://github.com/algorithm-visualizer/algorithm-visualizer visual algorithms https://www.educative.io/courses/visual-introduction-to-algorithms/ sort https://algori…

Week1: Machine Learning: A computer program is said to learn from experience E with respect to some class of tasks T and performance measure P, if its performance at tasks in T, as measured by P, improves with experience E. Supervised Learning:We alr…

Week 1: Machine Learning: A computer program is said to learn from experience E with respect to some class of tasks T and performance measure P, if its performance at tasks in T, as measured by P, improves with experience E. Supervised Learning:We al…

1. Principal component analysis algorithm data preprocessing 2. choosing the number of principal components 3. reconstruction from compressed representation 4. Application of PCA - compression - reduce memory/dist needed to store data - speed up lear…

OpenCASCADE7.3.0 is available for download OPEN CASCADE is pleased to announce a new public release of Open CASCADE Technology (version 7.3.0). Open CASCADE Technology version 7.3.0 is a minor release, which includes more than 350 new features, impro…

When I had the requirement to remove duplicate items from a very large array, I found out that the classic method to be not optimized as it took a pretty long time than desired. So, I devised this new algorithm that can sort a large array in a fracti…

Naive solution for this problem would be caluclate all the possible combinations: const numbers = [1, -3, 2 - 5, 7, 6, -1, -4, 11, -23]; // O(n^3) const findMaxSubAry = numbers => { let answer = Number.MIN_VALUE; /** * Calculate all the possible valu…

The k-nearest neighbors algorithm is used for classification of unknown items and involves calculating the distance of the unknown item's neighbors. We'll use Euclidean distance to determine the closest neighbor and make our best guess on what the my…

Depth first search is a graph search algorithm that starts at one node and uses recursion to travel as deeply down a path of neighboring nodes as possible, before coming back up and trying other paths.   const {createQueue} = require('./queue'); func…

Breadth first search is a graph search algorithm that starts at one node and visits neighboring nodes as widely as possible before going further down any other path. This algorithm requires the use of a queue to keep track of which nodes to visit, so…

/**@abstract * Write your own Math.pow(a int, b int) function * */ function pow (a, b) { let result = ; let nigate = b < ; b = nigate ? b*(-) : b; ) { result = ; } let isEven = b % === ; ) { result = a; } ) { result = isEven ? pow(a, b / ) * pow(a, b…

The median maintenance problem is a common programming challenge presented in software engineering job interviews. In this lesson we cover an example of how this problem might be presented and what your chain of thought should be to tackle this probl…

A graph is a data structure comprised of a set of nodes, also known as vertices, and a set of edges. Each node in a graph may point to any other node in the graph. This is very useful for things like describing networks, creating related nonhierarchi…

A linked list is a collection of items where each item points to the next one in the list. Because of this structure, linked lists are very slow when searching for an item at a particular index. An array, by comparison, has quick gets when searching…

Awesome系列的JavaScript资源整理.awesome-javascript是sorrycc发起维护的 JS 资源列表,内容包括:包管理器.加载器.测试框架.运行器.QA.MVC框架和库.模板引擎.数据可视化.时间轴.编辑器等. 前端MVC框架与库 angular.js - 前端MVVM框架,支持双向绑定,实现MVC架构,增强Web应用 aurelia - A Javascript client framework for mobile, desktop and web. backbo…

PS:Promise的用处是异步调用,这个对象使用的时候,call then函数,传一个处理函数进去,处理异步调用后的结果 Promise<Action>这样的对象呢,异步调用后的结果是一个Action,传到处理函数里 async/await的作用是,不需要写then函数了,相当于与自动帮你写,你只需要把异步调用后的结果保存下来就可以了 https://ponyfoo.com/articles/understanding-javascript-async-await http://liubin…

This week’s JavaScript news Read this issue on the Web | Issue Archive JavaScript Weekly Issue 185June 13, 2014 Editor: Peter Cooper   Featured ECMAScript 6 Schedule Changes — Allen Wirfs-Brock, editor of the ECMAScript 6 specification, recently ment…

先看demo再看例子 <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title></title> </head> <body> <div id="chart" style="width:600px;height:400px;"></d…

本文转载自:@manxisuo的<通过一张简单的图,让你彻底地.永久地搞懂JS的==运算>. 大家知道,==是JavaScript中比较复杂的一个运算符.它的运算规则奇怪,容让人犯错,从而成为JavaScript中"最糟糕的特性"之一. 在仔细阅读了ECMAScript规范的基础上,我画了一张图,我想通过它你会彻底地搞清楚关于==的一切.同时,我也试图通过此文向大家证明==并 不是那么糟糕的东西,它很容易掌握,甚至看起来很合理. 先上图: 图1 == 运算规则的精确描述在此…

下面,我们给大家提供了一个用于 HTML5 开发的各种用途的 JavaScript 库列表.这些框架能够给前端开发人员提供更好的功能实现的解决方案.如果你有收藏优秀的框架,也可以在后面的评论中分享给我们. 您可能感兴趣的相关文章 期待已久的2013年度最佳 jQuery 插件揭晓 小伙伴们都惊呆了!8个超炫的 Web 效果 10大流行的 Metro UI 风格 Bootstrap 主题 推荐35款精致的 CSS3 和 HTML5 网页模板 精选12款优秀 jQuery Ajax 分页插件和教程…

前言 看JS红宝书的5.2.5章节关于sort()方法,如何用一个compare函数,让数组顺序,倒序,有点云里雾里的.在网上度娘了一下,发现更迷糊了.走投无路的情况下,只能发动神技能,去 stackoverflow 上碰碰运气,本人的英语一直是处于被他人嘲笑的水平,所幸 stackoverflow 上的大牛们解释得通俗易懂,就连我这种渣渣也是豁然开朗. 附上原链接,造福更多的小伙伴: Algorithm of JavaScript "sort()" Function sort()的排…

来源地址: http://dmitrysoshnikov.com/ecmascript/the-quiz/#q1 另一篇帖子 看看国外的javascript题目,你能全部做对吗? http://www.cnblogs.com/aaronjs/p/3172112.html 答案都是自己总结的,毕竟是人肉解释器,解释不一定完全正确,如有不对欢迎大家指出! 题目1. 结果是什么? typeof typeof(null) “undefined” SyntaxError “string” “object”…

在当今时代,SVG是最流行的和正在被众多的设计人员和开发人员使用,创建支持视网膜和响应式的网页设计.绘制SVG不是一个艰巨的任务,因为大量的 JavaScript 库可与 SVG 图像搭配使用.这些JS库帮助设计师和开发人员可以轻松地为他们的项目和Web应用程序创建创新和逼真的图形. 您可能感兴趣的相关文章 网站开发中很有用的 jQuery 效果[附源码] 分享35个让人惊讶的 CSS3 动画效果演示 十分惊艳的8个 HTML5 & JavaScript 特效 Web 开发中很实用的10个效果[…

现在网络上又有越来越多的免费的(JS 图表)JavaScript图表图形绘制插件.我之前给一家网站做过复杂的图形,我们用的是 highchart.在那段时间,没有很多可供选择的插件.但现在不同了,很容易就可以找到很多功能非常不错的图表库.个人而言,此类插件的上升,是因为: 1. Flash 过去是最佳解决方案,但很多人多在从那迁移: 2. 现代浏览器及其更强大的计算能力,使其在转化绘制实时数据方面的能力更佳: 3. 绘制矢量图的不同技术愈发成熟:VML.SVG 和 Canvas. 当然了,你需要…

Javascript中有'=='和'==='两种相等比较,后者是全等,会判断数据类型,前者是相等,在比较时,会发生隐式转换. 如果将两个对象做'=='比较,结果会如何呢? 比如有如下两个对象: var obj1 = { name: "Nicole", sex : "female" } var obj2 = { name: "Nicole", sex : "female" } //Outputs: false console.l…

前端提交数据到后台,如果不适用https协议,则提交的数据就有被第三者窃取的可能.前端使用js来编码数据主要分为以下三种: 1.摘要算法 2.对称加密 3.非对称加密 下面分别介绍三种算法中对应的一个实例,并给出js实现例子. MD5(摘要算法) 百度百科 MD5即Message-Digest Algorithm 5(信息-摘要算法5),用于确保信息传输完整一致.是计算机广泛使用的杂凑算法之一(又译摘要算法.哈希算法),主流编程语言普遍已有MD5实现.将数据(如汉字)运算为另一固定长度值,是杂凑…

Author: Emmanuel Goossaert 翻译 This article is a short guide to implementing an algorithm from a scientific paper. I have implemented many complex algorithms from books and scientific publications, and this article sums up what I have learned while se…

MD5 编辑 Message Digest Algorithm MD5(中文名为消息摘要算法第五版)为计算机安全领域广泛使用的一种散列函数,用以提供消息的完整性保护.该算法的文件号为RFC 1321(R.Rivest,MIT Laboratory for Computer Science and RSA Data Security Inc. April 1992). MD5即Message-Digest Algorithm 5(信息-摘要算法5),用于确保信息传输完整一致.是计算机广泛使用的杂凑…

1. Later.js Later.js, a stadalone JavaScript library, offers an advanced usage for triggering recurring events and can easily replace both methods for many projects. Also, the library accepts cron expressions or user friendly schedules (like “every 1…

在说3D图表以前,首先要明确两个概念,一个是数据的维度,一个是呈现数据载体的维度.对于数据的维度,一维的数据呈现,但是呈现的载体是二维的平面图,比如饼图: 已经能够很清晰地观察到数据的分布情况.数据如果增加一个维度,变成二维,呈现载体依然是二维的平面图: 数据表达依然是清晰的.但是,倘若再增加一维,这个时候就面临了两个问题: 数据的维度增加,复杂性也增大了: 计算机发展到现在,绝大多数情况下数据载体依然是二维的平面图,如何展示三维的数据呢? 这两个问题中,第一个问题从本质上说,无法解决.数据的维…