1. cases 匹配任意单词(两侧可以有多个空格): ( +[a-zA-Z]+ +) 上述表达式无法匹配句子末尾的单词,若想匹配句尾或者逗号前的单词,则可拓展为: ( +[a-zA-Z]+[?,.]? +) 中括号内的?表示问号这一标点,中括号后的?则表示匹配之前的项 1 次或 0 次: 匹配空行: windows:^(\s*)\r\n Linux:^(\s*)\n 匹配 ip:[0-9]{1, 3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} 也可使用 [[:di…

iterable技巧 ▍1.创建一个数字序列(从0到10,间隔为2)   >>> range(0,10,2)[0, 2, 4, 6, 8] ▍2.对一串数字求和(从0到10,间隔为2)   >>> l = range(0,10,2)>>> sum(l)20 ▍3.检查序列中的任一元素是否为True   >>> any(a % 2 for a in range(0,10,2))True ▍4.检查序列中的所有元素是否为True   &g…

*:0 或 多个 ?:任意一个 [list]:a[xyz]b,a 与 b 之间必须也只能有一个字符,但只能是 x/y/z,也即:axb, ayb, azb [!list]:匹配除 list 中的任意单一字符,a[!0-9]b,a与b 之间必须也只能有一个字符,但不能是阿拉伯数字,axb,aab,a-b [c1-c2]:[0-9]/[a-z],a[0-9]b,必须也只能有一个字符,a0b,a1b,a9b: {string1, string2, -}:a[abc, xyz, 123]b,a 与 b…

matlab tips and tricks and ... page overview: I created this page as a vectorization helper but it grew to become my annotated Matlab reading cache. In order to motivate the DSP people out there, I am showing below how one can apply a window and scal…

原文:C# Tips & Tricks: Weak References - When and How to Use Them Sometimes you have an object which is very large and needed multiple times, but not constantly, throughout your application. For example a huge lookup table, or the contents of a large f…

https://www.hex-rays.com/products/decompiler/manual/tricks.shtml First of all, read the troubleshooting page. It explains how to deal with most decompilation problems. Below is a mix of other useful information that did not fit into any other page: V…

Tricks Device Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 124    Accepted Submission(s): 27 Problem Description Innocent Wu follows Dumb Zhang into a ancient tomb. Innocent Wu's at the entr…

Advanced Configuration Tricks Configuration of zend-mvc applications happens in several steps: Initial configuration is passed to the Application instance and used to seed the ModuleManager and ServiceManager. In this tutorial, we will call this conf…

As you know, JavaScript is the number one programming language in the world, the language of the web, of mobile hybrid apps (like PhoneGap or Appcelerator), of the server side (like NodeJS or Wakanda) and has many other implementations. It’s also the…

原文来自于:http://flippinawesome.org/2013/12/23/45-useful-javascript-tips-tricks-and-best-practices/ 1 – Don’t forget var keyword when assigning a variable’s value for the first time. Assignment to an undeclared variable automatically results in a global…