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128 lines
2.1 KiB
Markdown
128 lines
2.1 KiB
Markdown
---
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title: Ruby
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created: 2018-06-14
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updated: 2018-06-14
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type: summary
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tags: [tech, reference]
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external: https://github.com/wahyd4/knowledge/blob/master/categories/ruby.md
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---
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# Objects inheritances
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# Background jobs
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- Resque
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- Single threaded process
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- Delayed Job
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- Single process
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- Sidekiq
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- Redis and multiple threaded process
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```ruby
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while(!empty(queue)) {
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= get(queue); //从任务队列中取一个(涉及加锁等)
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q->callback(); //执行该任务
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}
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```
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# Test
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- Unit Test
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- Mini Test
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- RSpec
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- Browser Test
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- Capybara
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- Cucumber
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- Mock
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- Mocha
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# Auth
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- OmniAuth
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- Devise
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# Web Server
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- Thin
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- Unicorn
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- Puma
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- Passenger
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- Pow
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# Language
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- Syntax
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- lambda
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- yield
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- respond_to
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- send
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- <=>
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- return 1,0, -1
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- * before array
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- splat operator: split an array into a list of arguments
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- array << obj
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- append obj to new arry
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- block {} do end
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- Block is not object
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- use yield pass block
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- Proc
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- Proc is object
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- greeting = Proc.new { puts "hello, world" } greeting.call
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- Module
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- Can't be new
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- include
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- can't extend
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- Class
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# Code analysis
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- Rubocop
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# GC
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- Minor GC
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- Major GC
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- GC.stat
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# Bundler
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## Use groups in bundler
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```ruby
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# These gems are in the :default group
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gem 'nokogiri'
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gem 'sinatra'
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gem 'wirble', :group => :development
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group :test do
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gem 'faker'
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gem 'rspec'
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end
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group :test, :development do
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gem 'capybara'
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gem 'rspec-rails'
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end
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gem 'cucumber', :group => [:cucumber, :test]
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```
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when you install bundles, you can do
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```bash
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bundle install --without test development
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```
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# Web frameworks
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## Sintra
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## Ruby on Rails
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### How Rails application works
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- ORM
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- Active record
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- Mongoid
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- Websocket
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- Assets pipeline
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- Rails console
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# Gem mirrors
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- [http://mirrors.aliyun.com/rubygems/](http://mirrors.aliyun.com/rubygems/)
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- [https://gems.ruby-china.org](https://gems.ruby-china.org)
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