Ekaterina mAlishera

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

	class MyMiddleware
	def initialize(app)
	@app = app
	end

	def call(env)
	dup._call(env)
	end

	def _call(env)

	...
	class Application < Rails::Application

	...
	config.middleware.insert_before "ActionDispatch::Callbacks", "MyMiddleware"
	...
	...

	class CreateUsers < ActiveRecord::Migration
	def change
	create_table :users do \|t\|
	...

	t.datetime 'inserted_at', null: false
	t.datetime 'updated_at', null: false
	end
	end
	end

	defmodule Messaging.Repo.Migrations.CreateGroupChatVersions do
	use Ecto.Migration

	def change do
	create table(:group_chat_versions, primary_key: false) do
	add :group_chat_id, :uuid, primary_key: true
	add :version, :integer, primary_key: true

	timestamps
	end

	def maskarad(input, maska)
	input = input.to_s.chars

	maska.gsub(/@/) do \|at\|
	input.shift
	end.gsub(/^-/, '').gsub(/-$/, '') + input.join
	end

	=begin Input data
	Маска \| Номер \| Результат

	...
	gem 'composite_primary_keys', '=8.1.5'
	...