ttanimichi

class Object
  def original_class
    (self.to_s =~ /#<Class:(\w+)>/) and const_get($1)
  end
end

class Foo
  class << self
    def foo
      :foo

ttanimichi

require 'singleton'

class MyLogger
  include Singleton

  def initialize
    @logger = $stdout
  end

  def write(msg)

ttanimichi

require_recursive

require all files in a directory recursively.

Usage

% gem install require_recursive

ttanimichi

module ComparingWith
  module InstanceVariables
    def ==(other)
      [self, other].map {|object|
        names = object.instance_variables
        values = names.map {|name| object.instance_variable_get name }
        [names, values].transpose.to_h
      }.reduce(&:==)
    end
  end

ttanimichi

diff --git a/http/app/models/category.rb b/http/app/models/category.rb
index e1f8fac..98869aa 100644
--- a/http/app/models/category.rb
+++ b/http/app/models/category.rb
@@ -1,5 +1,5 @@
 class Category < ActiveRecord::Base
-  has_many :topics
+  has_many :topics, foreign_key: :category_code
 
   validates :name, presence: true, length: { maximum: 255 }

ttanimichi

• Category has_many topics
• Topic has_many posts

# app/models/category.rb

class Category < ActiveRecord::Base
  has_many :topics

  validates :name, presence: true, length: { maximum: 255 }

ttanimichi

/.bundle
/.ruby-version
/log/*
!/log/.keep
/tmp
/vendor/bundle
/.env

ttanimichi

source 'https://rubygems.org'

gem 'rails'
gem 'pg'

group :development, :test do
  gem 'pry'
  gem 'pry-doc'
  gem 'pry-rails'
  gem 'pry-byebug'

ttanimichi

'use strict';

class Time {
  constructor(time) {
    this.time = time;
  }

  getHours() {
    return Math.floor((this.time / 1000 / 3600) % 24);
  }

ttanimichi

module Kernel
  def yield_with_retry(limit: 3, before_retrying: ->{}, before_giving_up: ->{})
    limit.times do
      begin
        return yield
      rescue => e
        before_retrying.call
      end
    end
    before_giving_up.call