微信小程序工具类
wechat-common-sdk ?场景:目前工作中的项目需要包含并使用另一个项目。 也许是第三方库,或者你独立开发的,用于多个父项目的库。 现在问题来了:你想要把它们当做两个独立的项目,同时又想在一个项目中使用另一个。我们举一个例子。 假设你正在开发一个网站然后创建了 Atom 订阅。 你决定使...
有关Web常用字体的研究?
Windows自带字体:黑体:SimHei宋体:SimSun新宋体:NSimSun仿宋:FangSong楷体:KaiTi仿宋GB2312:FangSongGB2312楷体GB2312:KaiTiGB2312微软雅黑:Microsoft YaHei (win7以上)安装Office多出的字体:隶书:L...
Ruby设计模式透析之 —— 适配器(Adapter)
转载请注明出处:http://blog.csdn.net/sinyu890807/article/details/9400153此为Java设计模式透析的拷贝版,专门为Ruby爱好者提供的,不熟悉Ruby语法的朋友请转阅 :Java设计模式透析之 —— 适配器(Adapter)今天一大早,你的lea...
resque-web无法启动500服务器错误
I'm following the configuration guidelines for installing resque. I'm met with a (OpenURI::HTTPError). I'm using RVM 1.9.2-p180, rails 3.0.6, and POW....
ruby datamapper不能保存到数据库。
I have a database schema like that 我有一个这样的数据库模式 DataMapper.setup :default, "sqlite://#{Dir.pwd}/image.db"class Image include DataMapper::Resource ...
Ruby on Rails:如何使用迁移向现有列添加非空约束?
In my Rails (3.2) app, I have a bunch of tables in my database but I forgot to add a few not null constraints. I've googled around but I can't find ho...
无法处理HTTP响应和解析JSON数据
I am using Ruby on Rails 3 and I would like to solve an issue with the following code where a web client application receive back some JSON data from ...
在Ruby语言中,如何获取字符串中的行数?
In Ruby language, how can I get the number of lines in a string? 在Ruby语言中,如何获取字符串中的行数?6 个解决方案 ...
为什么Ruby使用自己的语法来安全导航操作符?
Ruby 2.3.0 introduces the safe navigation syntax that eases the nil handling of chained method calls by introducing a new operator that only calls the...
win32 程序开启控制台输出信息
在调试一个 win32 程序的时候,希望从 console 输出一些调试信息。 解决方案: AllocConsole();freopen("conout$","w",stdout) ;printf("hello hplonline!-_-\n") ;std::cout<<"i'm...
[翻译]理解Ruby中的blocks,Procs和lambda
原文出处:Understanding Ruby Blocks, Procs and Lambdas blocks,Procs和lambda(在编程领域被称为闭包)是Ruby中很强大的特性,也是最容易引起误解的特性。 这有可能是因为Ruby使用相当独特的方式来处理闭包。Ruby有四种处理闭包的方式,每...
无法使用rubyXL从xlsx文件中读取
I'm trying to work with excel files(xlsx) in ruby using rubyXl. I have no problem writing but can't get to output the content of a cell. 我正在尝试使用rubyXl...
另类方法实现rvm及相关软件安装到指定目录
公司针对每个宿主目录是由大小限制的,而除用root用户安装rvm是安装在/usr/local外,其他用户都是安装宿主目录下,这就会因空间不足导致安装失败。 解决办法: 1.先安装rvm; 2.将安装好的~/.rvm移到要放得位置(空间比较大的地方) 3.通过软连接的方式链接到~/.rvm即可 通...
在Ruby中比较两个包含字符串的数组
Forgive me if my code is off. I've still got my head in Ruby on Rails which seems to have subtle differences that are coming out as I learn more "just...
Rails从URL保存文件比直接Ruby更慢?
I have a Rails app that saves files in mongo. This works great and I have it set up to serve those files, but with some use cases I need to get the fi...
使用Ruby on Rails从URL创建动态站点地图
I am currently working on an application where I scrape information from a number of different sites. To get the deeplink for the desired topic on a s...
ActiveRecord查询比直接SQL慢得多?
I've been working on optimizing my project's DB calls and I noticed a "significant" difference in performance between the two identical calls below: 我...
Ruby on Rails + Jquery: Saving data from draggable lists
I'm trying to save data to the MySQL database in Rails when the user drags items from different lists. I'm using the below Jquery script and HTML: 当用户...
从GET请求中读取zip文件而不先保存在Ruby中?
I am trying read zip file from HTTP GET request. One way to do it is by saving the response body to a physical file first and then reading the zip fil...
Ruby on Rails和来自URL的JSON解析器
I use 'gem json' and need load JSON data from some url, for example: 我使用'gem json'并且需要从某个url加载JSON数据,例如: "http://locallhost:3000/qwerty/give_json.jso...