katex | 易学教程

详解时间、空间复杂度（内含彩蛋~~）

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目录一、时间复杂度：执行算法所需要的计算工作量（一）时间复杂度的理解 1.时间频度定义 2.（渐进）时间复杂度定义（二）时间复杂度的计算计算攻略：常见的算法时间复杂度由小到大排序：大O表示法推导实例： 1.常数阶 ⇒ O(1) 2.线性阶 ⇒ O(n) 3.平方阶 ⇒ O(n2) 二、空间复杂度：执行这个算法所需要的内存空间三、彩蛋学习算法我们首先需要清楚的概念就是时间复杂度和空间复杂度接下来我们就详细讲解一下时间复杂度和空间复杂度，为大家后面的学习打好基础！算法入门书籍挑选点这里~ 帮你快速找到适合自己的算法书籍（详细，内含彩蛋哦~）一、时间复杂度：执行算法所需要的计算工作量（一）时间复杂度的理解 1.时间频度定义我们需先明白：一个算法花费的时间是与算法中语句的执行次数成正比的（也就是说一个算法中语句执行次数越多，花费的时间也就越多）时间频度：T(n)：一个算法中的语句执行次数，记为T(n) 2.（渐进）时间复杂度定义 T(n)：算法中基本操作重复执行的次数是问题规模n的某个函数。 f(n)：某个辅助函数算法的（渐进）时间复杂度O(f(n))：若有某个辅助函数f(n),使得当n趋近于无穷大时，T(n)/f (n)的极限值为不等于零的常数，则称f(n)是T(n)的同数量级函数。记作T(n)=O(f(n)),称O(f(n))

JS数字正则表达式验证（全全全！！！）

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正则表达式，⼜名 “规则表达式” 1 由我们⾃⼰来书写 “规则”，专⻔⽤来检测字符串是否符合 “规则” 使⽤的我们使⽤⼀些特殊的字符或者符号定义⼀个 “规则公式”，然后⽤我们定义好的 “规则公式” 去检测字符串是不是合格。今天给大家分享一下用JS正则表达式验证数字： 1、验证数字：1*$ 2、验证n位的数字：^\d{n}$ 3、验证至少n位数字：^\d{n,}$ 4、验证m-n位的数字：^\d{m,n}$ 5、验证零和非零开头的数字：^(0|[1-9][0-9]*)$ 6、验证有两位小数的正实数：2+(.[0-9]{2})?$ 7、验证有1-3位小数的正实数：3+(.[0-9]{1,3})?$ 8、验证非零的正整数：^+?[1-9][0-9]*$ 9、验证非零的负整数：^-[1-9][0-9]*$ 10、验证非负整数（正整数 + 0） ^\d+$ 11、验证非正整数（负整数 + 0） ^((-\d+)|(0+))$ 12、验证长度为3的字符：^.{3}$ 13、验证由26个英文字母组成的字符串：4+$ 14、验证由26个大写英文字母组成的字符串：5+$ 15、验证由26个小写英文字母组成的字符串：6+$ 16、验证由数字和26个英文字母组成的字符串：7+$ 17、验证由数字、26个英文字母或者下划线组成的字符串：^\w+$ 18、验证用户密码:8\w{5

文学式编程-nbdev入门教程

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nbdev是一个使用Jupyter Notebook进行多模块软件开发的辅助工具，可以将多个Notebook组装为一个大型的软件系统，自动生成代码和文档，并能够在Notebook中进行交互运行和探索性测试。 nbdev 源码： https://github.com/fastai/nbdev nbdev 文档： https://nbdev.fast.ai/ nbdev主要完成下面的功能：建立python开发框架和git repo版本。在notebook中的cell中使用#export标记为输出代码区块。使用库函数notebook2script()将#export标记的代码转化为python库*.py。所生成的代码放在project name的目录下，可以在notebook中引用或者直接运行。例程项目，用于nCoV分析（初级阶段）： https://github.com/openthings/anti2020ncov 1、安装 nbdev已经加入 PyPI，使用下面的命令安装： pip install nbdev 对于 editable install ，使用： git clone https://github.com/fastai/nbdev pip install -e nbdev 2、快速开始 2.1 创建项目开始自己的 project, 点击: nbdev

How can I replace Matjax script with Katex script on blogger?

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问题 I have a website that is using many equation together with Mathjax. Until now I found just a single Mathjax script that is working on my blog. The script that I have now is Java http://imgur.com/IRlx4oT I want a Katex script to replace this MatJax script to work with my blog without making any modification. I have the latex part written between $...$. I will appreciate a simple script that has the .js file already hosted. A script that I can copy-paste to my blogger site and work. Can you

Greek fonts for Katex

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问题 I suceeded to use katex on my blog instead of MathJax. However some of the equations contained greek symbols and Katex does not contain the fonts for rendering the greek characters. (Matjax is very good at rendering the greek letters) Are there Katex fonts available to render an equation that contains greek characters? How to use these fonts (how to include them together with the Katex script on my site)? For example the equation hν0=hν+Ek+W(1) (ν is \nu) is rendering good with mathjax but

Render TeX with KaTeX or MathJax

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问题 I have a html document <div> <p>One paragraph</p> <p>Another paragraph</p> </div> and in some of the paragraphs, I have <p>Some text and a formula $a = b + c$.</p> and I want the text withing the $-signs to be rendered as TeX math using KaTeX. The problem is that if I want to use it in the browser, I have to use katex.render("c = \\pm\\sqrt{a^2 + b^2}", element); so I need to assign an element. So should I really write my html document like this or are there any other options: <div> <p>One

How can I render all inline formulas in $..$ with KaTeX?

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问题 So I want to have KaTeX inline formulas like with MathJax. But so far I've found only render() function which "draws" a string to an element. And I need to modify a part of a text node in DOM. I really couldn't find how to do this with KaTeX. Does it have such functionality? MathJax could do this. 回答1: Yes, you can render all $ -delimited formulas inline using KaTeX's auto-render extension. Per the documentation on that page, $ is not one of the default delimiters so you'll need to set it

How can I render all inline formulas in $..$ with KaTeX?

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So I want to have KaTeX inline formulas like with MathJax. But so far I've found only render() function which "draws" a string to an element. And I need to modify a part of a text node in DOM. I really couldn't find how to do this with KaTeX. Does it have such functionality? MathJax could do this. Yes, you can render all $ -delimited formulas inline using KaTeX's auto-render extension . Per the documentation on that page, $ is not one of the default delimiters so you'll need to set it when you call renderMathInElement() and set display to false , which renders inline. Below is one example and

Getting Katex fonts to load with Rails Asset Pipeline

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问题 I'm integrating the Katex math formula rendering library into a Rails 3.2 app but the font assets keep returning a 404 error message: Started GET "/assets/fonts/KaTeX_Math-Italic.woff" Served asset /fonts/KaTeX_Math-Italic.woff - 404 Not Found (3ms) ActionController::RoutingError (No route matches [GET] "/assets/fonts/KaTeX_Math-Italic.woff"): I placed all of the fonts in the vendor/assets/fonts directory. Without manipulating the third party JS or CSS files, how do I go about solving this?

Getting Katex fonts to load with Rails Asset Pipeline

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I'm integrating the Katex math formula rendering library into a Rails 3.2 app but the font assets keep returning a 404 error message: Started GET "/assets/fonts/KaTeX_Math-Italic.woff" Served asset /fonts/KaTeX_Math-Italic.woff - 404 Not Found (3ms) ActionController::RoutingError (No route matches [GET] "/assets/fonts/KaTeX_Math-Italic.woff"): I placed all of the fonts in the vendor/assets/fonts directory. Without manipulating the third party JS or CSS files, how do I go about solving this? It turns out that all of the assets are compiled into the public/assets directory instead of being

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