Jason Pilz jasonpilz

Install MongoDB with Homebrew

brew install mongodb
mkdir -p /data/db

Set permissions for the data directory

Ensure that user account running mongod has correct permissions for the directory:

Commands examples

If the namespace is not used then the commands will perform on top of the default database. bundle exec rake db:create bundle exec rake db:migrate

By using the namespace we are going to use all the configuration for our alternate DB. bundle exec rake store:db:create bundle exec rake store:db:migrate

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.

Branching

Quick Legend

Description, Instructions, Notes

Instance	Branch

Unfortunately, the Cisco AnyConnect client for Mac conflicts with Pow. And by "conflicts", I mean it causes a grey-screen-of-death kernel panic anytime you connect to the VPN and Pow is installed.

As an alternative, there is OpenConnect, a command-line client for Cisco's AnyConnect SSL VPN.

Here's how to get it set up on Mac OS X:

OpenConnect can be installed via homebrew:
```
 brew update
```

brew install openconnect

Transactions

As your business logic gets complex you may need to implement transactions. The classic example is a bank funds transfer from account A to account B. If the withdrawal from account A fails then the deposit to account B should either never take place or be rolled back.

Basics

All the complexity is handled by ActiveRecord::Transactions. Any model class or instance has a method named .transaction. When called and passed a block, that block will be executed inside a database transaction. If there's an exception raised, the transaction will automatically be rolled back.

	# Note1: all `...` below mean "etcetera", like psuedocode, not implying the new Ruby 3 syntax
	# Note2: `obj.()` is syntactic sugar for `obj.call()`

	# Given an invocation like this:
	OnboardOrganization.(arg1, arg2, ...)

	# Here are some possible ways you could implement it:

	# 1. If the definition fits in a s single method, you can toss it on a module
	# You'd choose a module b/c you don't want a class here since you don't want to

	# Compiled source #
	###################
	*.com
	*.class
	*.dll
	*.exe
	*.o
	*.so

	# Packages #

	##
	# by SoAwesomeMan
	str =<<-EOS.gsub(/^[\s\t]\|[\s\t]\n/, '') # no space "\s" for new line "\n"; kill tabs too
	select awesome, awesome, awesome, awesome, awesome, awesome,
	from rad, rad, rad, rad, rad, rad, rad, rad, rad, rad, rad,
	where cool cool cool cool cool cool cool cool cool cool cool'
	EOS
	# => "select awesome, awesome, awesome, awesome, awesome, awesome,from rad, rad, rad, rad, rad, rad, rad, rad, rad, rad, rad,where cool cool cool cool cool cool cool cool cool cool cool'"

	str =<<-EOS.gsub(/^[\s\t]/, '').gsub(/[\s\t]\n/, ' ').strip # yes space "\s" for new line "\n"; kill tabs too