common

GCF/LCM in Haskell

匿名 (未验证) 提交于 2019-12-03 08:48:34
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I'm extremely new to Haskell. Is there a simple way to find the GCF or LCM (Least Common Multiple) in Haskell? 回答1: I'm not sure what the LCF is but the GCF is a Haskell favorite. Using the Euclidean Algroithm you can really get a sense of how Haskell works. http://en.wikipedia.org/wiki/Euclidean_algorithm There is a great explanation of how the algorithm is set up here http://en.literateprograms.org/Euclidean_algorithm_(Haskell) . This type of recursion is common in Haskell and it shows how expressive the language can be. gcd a 0 = a gcd a

How to get started with svn:externals?

匿名 (未验证) 提交于 2019-12-03 08:46:08
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm looking for a succinct and well-written tutorial on using svn:externals. I already know how to use them in a basic way myself, but I want a good article that I can link to when answering questions like this one that come up recently: What to do with multiple projects depending on the same source? I'd do it myself, but I don't use them often enough to want to stick my neck out and write a tutorial on it. Google was surprisingly unhelpful with this topic. 回答1: Here are some sections about it in the svnbook / TortoiseSVN manual:

Python: how to find common values in three lists

匿名 (未验证) 提交于 2019-12-03 08:42:37
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I try to find common list of values for three different lists: a = [1,2,3,4] b = [2,3,4,5] c = [3,4,5,6] of course naturally I try to use the and operator however that way I just get the value of last list in expression: >> a and b and c out: [3,4,5,6] Is any short way to find the common values list: [3,4] Br 回答1: Use sets: >>> a = [1, 2, 3, 4] >>> b = [2, 3, 4, 5] >>> c = [3, 4, 5, 6] >>> set(a) & set(b) & set(c) {3, 4} Or as Jon suggested: >>> set(a).intersection(b, c) {3, 4} Using sets has the benefit that you don’t need to repeatedly

What are the most common non-BMP Unicode characters in actual use? [closed]

匿名 (未验证) 提交于 2019-12-03 08:41:19
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: In your experience which Unicode characters, codepoints, ranges outside the BMP (Basic Multilingual Plane) are the most common so far? These are the ones which require 4 bytes in UTF-8 or surrogates in UTF-16. I would've expected the answer to be Chinese and Japanese characters used in names but not included in the most widespread CJK multibyte character sets, but on the project I do most work on, the English Wiktionary, we have found that the Gothic alphabet is far more common so far. UPDATE I've written a couple of software tools to scan

what is cgi programming

匿名 (未验证) 提交于 2019-12-03 08:36:05
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: What is exactly meant by CGI programming . If I am writing a cgi program in 'C' , in that context , what does the 'cgi' mean ? Is the servelt environment is an abstraction of classical cgi programming ? 回答1: Abbreviation of Common Gateway Interface, a specification for transferring information between a World Wide Web server and a CGI program. A CGI program is any program designed to accept and return data that conforms to the CGI specification. The program could be written in any programming language, including C, Perl, Java, or Visual

Angular2: No best common type exists among return expressions

匿名 (未验证) 提交于 2019-12-03 08:35:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: Trying to compile my typescript with gulp but I'll get the following error: No best common type exists among return expressions. Where the code is a for loop which looks like this: getIndexInCompareList(result) { for (var i = 0; i < this.compare.length; i++) { if (this.compare[i].resource.id == result.resource.id) { return i; } } return false; } 回答1: any as your return value for the function to fix this issue. However, as many other functions such as indexOf return numbers only even if the value was not found I would suggest you do the same.

Sharing code between solutions in TFS

匿名 (未验证) 提交于 2019-12-03 08:30:34
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I have a few different applications that i need to share code between to reduce maintenance. I have tried to read a lot on stackoverflow and the web in general and it is a fairly common problem; i have not found an answer i like. Our TFS branching structure is like this. We have three branches Development, Main and Production. On the Development branch all active development is done, when we are done with developing new features, we merge it with Main, and then to production. The production branch is always the code running on the servers.

Can't launch PhantomJS with Python in Windows 7

匿名 (未验证) 提交于 2019-12-03 07:50:05
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm trying to use PhantomJS with Python in my Windows 7, but is not working! Here what i tried to do. First, i installed webdriver. In the following code Firefox opens normally, so i believe webdrive is correctly installed. from selenium import webdriver browser = webdriver . Firefox () browser . get ( 'http://seleniumhq.org/' ) Then, i downloaded PhantomJS from the official website, unpacked it and put it in c:\Phantomjs. Then i added it in Environment Variables. Here what is in there: C:\Phantom\phantomjs-2.0.0-windows\bin So,

多页应用增量更新静态资源Webpack打包方案

江枫思渺然 提交于 2019-12-03 05:00:00
本文转载于: 猿2048 网站➫ https://www.mk2048.com/blog/blog.php?id=h1b2b2cibb 自从vue、react或者angular这类框架流行后,单页应用的数量也越来越多。但是限制于单页应用的一些缺点,比如:seo、首屏时间等因素,很多应用的结构还是保持了多页面结构。此篇讲述的是如何在多页面应用结构的基础上,利用webpack生成带hashcode文件名的方式实现静态资源的增量更新方案。 多页应用的结构在用户访问时往往会在当前页面加载一些公共资源和当前页面的js和css,可能有些应用还在用比较传统的: https://url/[版本号]/xxx.[js|css] 或 https://url/xxx.js?r=xxx 的方式来保证当应用更新时客户端也能及时获取到最新的资源文件。而当前流行的前端的架构中单页应用在发布时,往往可以通过编译时在生成的资源文件名中加入文件的hashcode值来保证每个资源都有自己独立的"版本号"。客户端加载带有hashcode文件名的资源文件,当某个资源文件更新时也不会影响其他资源文件的名称,可以有效利用客户端的强缓存策略,增加资源文件的缓存命中率。 下面我们将实现在多页架构中如何实现静态文件名加入hashcode,并在服务端引用文件的例子: 1.Webpack编译生成文件追加hashcode webpack

编译Netty源码遇到的一些问题-缺少io.netty.util.collection包

做~自己de王妃 提交于 2019-12-03 04:26:43
缺少包和java类 下载好Netty的源码后,导入到IDE,运行自带的example时编译不通过。 如下图,是因为io.netty.util.collection的包没有 点进去看,确实没有这个包 发现猫腻 发现这个common包下有一个templates包,放的应该是模板。还有一个script包,放的应该是脚本。 看一下这个脚本,应该是替换掉下面模板文件名的K字母,替换成Byte、Char等单词,生成如ByteObjectHashMap、CharObjectHashMap。。。的类 如何运行脚本生成java类 知道了这个原理,那怎么运行这个脚本的呢? 我们看他是groovy结尾的,应该是需要groovy的一个插件,pom文件里也确实有这个插件 怎么用这个插件运行脚本呢? 选中这个common项目右键选择Run Maven - compile 运行失败 不好意思,报了一堆错,错误信息缺失一片空白 打开对应的java文件,也是没有任何错误提示的,难搞。。。 解决运行失败 别急,慢慢看。把错误拉到最后看 粘出来错误信息: E:\idea_work\netty-4.1\common\src\main\resources\META-INF\native-image\io.netty\common\native-image.properties:0: invalid newline