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pi@raspberrypi:~ $ crystal
/opt/crystal/embedded/bin/crystal: /lib/arm-linux-gnueabihf/libtinfo.so.5: no version information available (required by /opt/crystal/embedded/bin/crystal)
/opt/crystal/embedded/bin/crystal: /usr/lib/arm-linux-gnueabihf/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /opt/crystal/embedded/bin/crystal)

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{
  "extends": "airbnb",
  "env": {
    "browser": true
  },
  "rules": {
    "no-underscore-dangle": 0,
    "class-methods-use-this": 0,
    "arrow-body-style": 0,
    "no-console": 0,

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require 'benchmark/ips'

class Foo
  def bar; end
end

foo = Foo.new

Benchmark.ips do |x|
  x.config(:time => 5, :warmup => 2)

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class Api::V1::UserSerializer < Api::V1::BaseSerializer
  type :users

  attributes :id, :name
  has_many :microposts, serializers: Api::V1::MicropostSerializer do
    link :self, '/api/v1/microposts' 
  end
end

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import Ember from 'ember';

export default Ember.Service.extend({
  _observer1: Ember.observer('foobar', function() {
    //something here
  }).on('init'),
  _observer2: Ember.on('init', Ember.observer('foobar', function() {
    //something here
  }))
});

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require 'git'
require 'fileutils'
require 'date'

begin
  FileUtils.rm_rf('.git/')
  File.delete('myfile.out')
rescue Errno::ENOENT
end

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class Hash
  def reshape(binding)
    new_hash = self.clone
    new_hash.each{|k, v| new_hash[k] = (binding.instance_exec(&(v))) if v.is_a? Proc}

    return new_hash
  end
end

def foo_method

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require 'benchmark'

@i=0

def undefined_check
  return @undefined_check += 2 if defined?(@undefined_check)
  return @i += 1
end

@nil = nil

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Rails mailer structure

Your application is growing, and you are starting to have a complex mailing system: notification emails, retention emails, misc user emails, admin emails, etc...

It's time to clean up your mailers !

Existing mailer

You may already have a single mailer, responsible of every emails, like this one:

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Rails Rspec APIs Testing Notes

Folders Structure

  spec
  |--- apis #do not put into controllers folder. 
        |--- your_api_test_spec.rb  
  |--- controllers
  |--- models
  |--- factories
 |--- views