ruby | 易学教程

Ruby project help. Can't get saved instances from array

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问题 TLDR I am working on a project that creates instances using an API. I want to be able to recall all of my instances but can't figure out how. I'm relatively new to Ruby and programming in general so I hope I'm explaining everything well enough. Here's my code. class Suggestion attr_accessor :type, :participants attr_reader :activity, :price, :link, :key, :accessibility @@all = [] def initialize(type, participants) @type = type @participants = participants # @activity = [] # @price = price #

RUBY | Find a way to find an exception on the same word to capitalize

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问题 def titleize(string) nocaps = ["the","and"] puts string.split(" ").map { |word| nocaps.include?(word) ? word : word.capitalize }.join(" ") end titleize("the bridge over the river kwai") ------------------------------------------------------------------------------------------ ######Render => "the Bridge Over the River Kwai" ######Expected rendering => "The Bridge Over the River Kwai" Hello i present you my piece of code, the rendering gives "the Bridge Over the River Kwai" While I would like

2014年10月12日

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自己在今天做ruby on rails tutorial的时候碰到的因为sprockets版本被bundle update自动更新之后造成导入bootstrap不成功的问题。具体问题跟这个回答几乎一模一样： http://stackoverflow.com/questions/22391116/nomethoderror-in-pageshome-undefined-method-environment-for-nilnilclass 来源： oschina 链接： https://my.oschina.net/u/1990131/blog/330010

.NET equivalent of Ruby's begin/rescue/else

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问题 Ruby has an else block that would go in a begin/rescue (try/catch for .NET folks) begin #some code rescue #oh noes! Catches errors like catch blocks in .NET else #only executes when NO errors have occured ensure #always executes - just like the finally in .NET end The code in the else block will only execute if no errors have been raised. Is there a construct in .NET that provides this functionality? 回答1: In .NET, you can just list the code after #some code : try { // some code // Only

Ruby getting deeply nested JSON API data

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问题 I have a rails app which gets a response from World Weather Online API. I'm using the rest-client gem and the response is in JSON format. I parse the response using: parsed_response = JSON.parse(response) Where parsed_response is obviously a hash. The data I need are strings inside a hash inside an array inside a hash inside another array inside another hash inside another hash. The inner-most nested hashes are inside ["hourly"] , an array of 8 hashes, each with 20 keys, possessing string

Cron is running in home directory instead of file directory

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问题 I followed some other posts in stackoverflow and successfully setup cron with RVM using rvm cron setup and injected some ENV to the crontab file. When I was troubleshooting why the dotenv gem is not working, I realised the following: I placed my test.rb in file path /home/myuser/ruby/test.rb and had my crontab file as shown below: * * * * * ruby /home/myuser/ruby/test.rb >> /home/myuser/ruby/output.log and when I puts the output of the test.rb with Dir.pwd . The output states that the rb is

Check if folder exist in s3 bucket

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问题 How can I check if some folder exists in my s3 bucket using Ruby on Rails? I’m using AWS:S3 official gem After initializing the global connection AWS::S3::Base.establish_connection!(:access_key_id => 'my_key_id', :secret_access_key => ‘my_secret’) I have bucket named: myfirstbucket With folder inside named: my_folder With file inside my_folder named: my_pic.jpg When I try to check if my_pic.jpg exist it work just fine s3object.exists? “/my_folder/my_pic.jpg” , “myfirstbucket” => True How can

Getting ActionController::RoutingError (No route matches [OPTIONS] “/users” when trying to POST data to RAils server with AngularJS

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问题 Having issue when trying to POST data to Rails server from my AngularJS side. The server error: ActionController::RoutingError (No route matches [OPTIONS] "/users"): actionpack (4.1.9) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call' actionpack (4.1.9) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' railties (4.1.9) lib/rails/rack/logger.rb:38:in `call_app' railties (4.1.9) lib/rails/rack/logger.rb:20:in `block in call' activesupport (4.1.9) lib/active_support

程序员必备的网站推荐

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CSDN: https://blog.csdn.net/chk218/article/details/83620744 1 一、开源代码托管平台 GitHub（https://github.com） gitHub是一个面向开源及私有软件项目的托管平台，因为只支持git 作为唯一的版本库格式进行托管，故名gitHub。 gitHub于2008年4月10日正式上线，除了git代码仓库托管及基本的 Web管理界面以外，还提供了订阅、讨论组、文本渲染、在线文件编辑器、协作图谱（报表）、代码片段分享（Gist）等功能。目前，其注册用户已经超过350万，托管版本数量也是非常之多，其中不乏知名开源项目 Ruby on Rails、jQuery、python 等。 2018年6月4日，微软宣布，通过75亿美元的股票交易收购代码托管平台GitHub。码云（https://gitee.com）码云专为开发者提供稳定、高效、安全的云端软件开发协作平台无论是个人、团队、或是企业，都能够用码云实现代码托管、项目管理、协作开发 2 二、编程学习网站菜鸟教程（http://www.runoob.com）菜鸟教程的 Slogan 为：学的不仅是技术，更是梦想！菜鸟教程域名为 runoob.com, runoob 为 Running Noob 的缩写，意为：奔跑吧！菜鸟。菜鸟教程包括了HTML、CSS

Hello World

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WOW!你没有看错，这个是HA省大蒟蒻Peter_Matthew的博客。。。 #include<iostream> using namespace std; int main() { cout<<"Hello,world!"<<endl; } #include<stdio,h> int main(void) { puts("Hello,world!"); return 0; } javascript: document.write("Hello,world!"); printfn "Hello,world!" ? "Hello,world!" @echo Hello,world! print("Hello,world!") begin writeln('Hello,world!'); end public class Hello { public static void Main() { System.Console.WriteLine("Hello,world!"); } } 本作品采用知识共享署名-非商业性使用-相同方式共享 4.0 国际许可协议进行许可。来源： oschina 链接： https://my.oschina.net/u/3733799/blog/1931167