9cardinals’s gists

9cardinals / gist:7313305

Created November 5, 2013 03:16

simple string interpolation example in ruby

	p "hello #{3}"
	num = 5
	p "hello #{num}"

9cardinals / compound interest

Last active February 3, 2020 21:13

simple compound interest calculator using math operations in ruby

	# principal amount

	p = 10_000

	# annual rate of interest
	r = 0.05

	# number of years
	t = 5

9cardinals / url method

Created November 5, 2013 04:12

method to call url and text

	def link(address, text)
	"URL is at: <a href='#{address}'>, #{text}</a>"
	end

	p link("http://www.github.com/9cardinals/", "my github")

9cardinals / simpleCombinationLock

Created November 8, 2013 05:38

simple ruby combination lock

	def lock(key1,key2,key3,key4)
	if
	(key1 == 3 \|\| key1 == 5 \|\| key1 == 7) && (key2 == 2) && (key3 == 5 \|\| key3 == 6) && (key4 == 8 \|\| key4 == 9 \|\| key4 == 0)
	then
	"unlocked"
	else
	"locked"
	end
	end

9cardinals / gist:7634167

Created November 24, 2013 23:51

unable to bundle install

	here's the gemfile:
	source 'https://rubygems.org'

	# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
	gem 'rails', '4.0.1'

	# Use sqlite3 as the database for Active Record
	group :production do
	gem 'pg'
	end

9cardinals / gist:7634206

Created November 24, 2013 23:56

new error after correcting gemfile

	source 'https://rubygems.org'

	# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
	gem 'rails', '4.0.1'

	# Use sqlite3 as the database for Active Record
	group :production do
	gem 'pg'
	end

9cardinals / gemfile

Created November 25, 2013 00:07

problematic gemfile

	source 'https://rubygems.org'

	# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
	gem 'rails', '4.0.1'

	# Use sqlite3 as the database for Active Record
	group :production do
	gem 'pg'
	end

9cardinals / gist:7634439

Created November 25, 2013 00:24

still having problems with this gemfile. error terminator at line 54. for comparison i am looking at gemfile here for gem versions: https://github.com/Bloc/rails-tutorial/blob/master/Gemfile

	source 'https://rubygems.org'

	# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
	gem 'rails', '3.2.12'

	# Use sqlite3 as the database for Active Record
	group :production do
	gem 'pg'
	end

9cardinals / gist:7635641

Created November 25, 2013 03:04

rails no longer generating models/controllers, starting server, etc when switching from 4.0.1 and 3.2.12. Earlier today rails was working with no issues. I then made some changes to a gem which required switching dependencies from 3.2.12 ==> 4.0.1 and back. After that, Rails completely stopped working on all commands aside from -v

	Last login: Sun Nov 24 18:05:32 on console
	vera:code monicacardinal$ cd bloccit/
	vera:bloccit monicacardinal$ ls -a
	. Gemfile app db tmp
	.. Gemfile.lock bin lib vendor
	.git README.md config log
	.gitignore Rakefile config.ru public
	vera:bloccit monicacardinal$ rails s
	Usage:
	rails new APP_PATH [options]

9cardinals / gist:7652799

Created November 26, 2013 02:55

error on model generation

	vera:bloccit monicacardinal$ bundle exec bin/rails generate model Post title:string body text
	invoke active_record
	/Users/monicacardinal/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.12/lib/active_record/dynamic_matchers.rb:55:in `method_missing': undefined method `migration_error=' for #<Class:0x007fa9d3fdaca8> (NoMethodError)
	from /Users/monicacardinal/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.12/lib/active_record/railtie.rb:66:in `block (3 levels) in <class:Railtie>'
	from /Users/monicacardinal/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.12/lib/active_record/railtie.rb:65:in `each'
	from /Users/monicacardinal/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.12/lib/active_record/railtie.rb:65:in `block (2 levels) in <class:Railtie>'
	from /Users/monicacardinal/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-3.2.12/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
	from /Users/monicacardinal/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-3.2.12/lib/active_support/lazy_load_hooks.rb:36

Monica Cardinal 9cardinals