├── .gitignore
├── .rvmrc
├── .travis.yml
├── Gemfile
├── Gemfile.lock
├── LICENSE
├── README.md
├── Rakefile
├── job_interview.gemspec
├── lib
    ├── job_interview.rb
    └── job_interview
    │   ├── answer.rb
    │   ├── fibonacci.rb
    │   ├── fizz_buzz.rb
    │   ├── hello_world.rb
    │   ├── knapsack.rb
    │   ├── primes.rb
    │   ├── questions.rb
    │   └── quine.rb
└── spec
    ├── fibonacci_spec.rb
    ├── fizz_buzz_spec.rb
    ├── hello_world_spec.rb
    ├── knapsack_spec.rb
    ├── primes_spec.rb
    ├── questions_spec.rb
    ├── quine_spec.rb
    └── spec_helper.rb


/.gitignore:
--------------------------------------------------------------------------------
1 | coverage
2 | *.swp
3 | *.un~
4 | 


--------------------------------------------------------------------------------
/.rvmrc:
--------------------------------------------------------------------------------
 1 | #!/usr/bin/env bash
 2 | 
 3 | # This is an RVM Project .rvmrc file, used to automatically load the ruby
 4 | # development environment upon cd'ing into the directory
 5 | 
 6 | # First we specify our desired <ruby>[@<gemset>], the @gemset name is optional.
 7 | environment_id="ruby-1.9.3-p0@job_interview"
 8 | 
 9 | #
10 | # Uncomment the following lines if you want to verify rvm version per project
11 | #
12 | # rvmrc_rvm_version="1.10.2" # 1.10.1 seams as a safe start
13 | # eval "$(echo ${rvm_version}.${rvmrc_rvm_version} | awk -F. '{print "[[ "$1*65536+$2*256+$3" -ge "$4*65536+$5*256+$6" ]]"}' )" || {
14 | #   echo "This .rvmrc file requires at least RVM ${rvmrc_rvm_version}, aborting loading."
15 | #   return 1
16 | # }
17 | #
18 | 
19 | #
20 | # Uncomment following line if you want options to be set only for given project.
21 | #
22 | # PROJECT_JRUBY_OPTS=( --1.9 )
23 | #
24 | # The variable PROJECT_JRUBY_OPTS requires the following to be run in shell:
25 | #
26 | #    chmod +x ${rvm_path}/hooks/after_use_jruby_opts
27 | #
28 | 
29 | #
30 | # First we attempt to load the desired environment directly from the environment
31 | # file. This is very fast and efficient compared to running through the entire
32 | # CLI and selector. If you want feedback on which environment was used then
33 | # insert the word 'use' after --create as this triggers verbose mode.
34 | #
35 | if [[ -d "${rvm_path:-$HOME/.rvm}/environments" \
36 |   && -s "${rvm_path:-$HOME/.rvm}/environments/$environment_id" ]]
37 | then
38 |   \. "${rvm_path:-$HOME/.rvm}/environments/$environment_id"
39 | 
40 |   if [[ -s "${rvm_path:-$HOME/.rvm}/hooks/after_use" ]]
41 |   then
42 |     . "${rvm_path:-$HOME/.rvm}/hooks/after_use"
43 |   fi
44 | else
45 |   # If the environment file has not yet been created, use the RVM CLI to select.
46 |   if ! rvm --create  "$environment_id"
47 |   then
48 |     echo "Failed to create RVM environment '${environment_id}'."
49 |     return 1
50 |   fi
51 | fi
52 | 
53 | #
54 | # If you use an RVM gemset file to install a list of gems (*.gems), you can have
55 | # it be automatically loaded. Uncomment the following and adjust the filename if
56 | # necessary.
57 | #
58 | # filename=".gems"
59 | # if [[ -s "$filename" ]]
60 | # then
61 | #   rvm gemset import "$filename" | grep -v already | grep -v listed | grep -v complete | sed '/^$/d'
62 | # fi
63 | 
64 | # If you use bundler, this might be useful to you:
65 | # if [[ -s Gemfile ]] && ! command -v bundle >/dev/null
66 | # then
67 | #   printf "%b" "The rubygem 'bundler' is not installed. Installing it now.\n"
68 | #   gem install bundler
69 | # fi
70 | # if [[ -s Gemfile ]] && command -v bundle
71 | # then
72 | #   bundle install
73 | # fi
74 | 
75 | if [[ $- == *i* ]] # check for interactive shells
76 | then
77 |     echo "Using: $(tput setaf 2)$GEM_HOME$(tput sgr0)" # show the user the ruby and gemset they are using in green
78 | else 
79 | 	echo "Using: $GEM_HOME" # don't use colors in interactive shells
80 | fi
81 | 
82 | 


--------------------------------------------------------------------------------
/.travis.yml:
--------------------------------------------------------------------------------
1 | language: ruby
2 | rvm:
3 |   - 1.9.3
4 | 


--------------------------------------------------------------------------------
/Gemfile:
--------------------------------------------------------------------------------
1 | source 'https://rubygems.org'
2 | 
3 | gemspec
4 | 
5 | gem 'coveralls', require: false
6 | 


--------------------------------------------------------------------------------
/Gemfile.lock:
--------------------------------------------------------------------------------
 1 | PATH
 2 |   remote: .
 3 |   specs:
 4 |     job_interview (0.1.6)
 5 |       faker (~> 0.9.5)
 6 | 
 7 | GEM
 8 |   remote: https://rubygems.org/
 9 |   specs:
10 |     colorize (0.5.8)
11 |     coveralls (0.6.2)
12 |       colorize
13 |       multi_json (~> 1.3)
14 |       rest-client
15 |       simplecov (>= 0.7)
16 |       thor
17 |     diff-lcs (1.1.3)
18 |     faker (0.9.5)
19 |       i18n (~> 0.4)
20 |     i18n (0.6.4)
21 |     mime-types (1.21)
22 |     multi_json (1.7.1)
23 |     rake (10.0.3)
24 |     rest-client (1.6.7)
25 |       mime-types (>= 1.16)
26 |     rspec (2.9.0)
27 |       rspec-core (~> 2.9.0)
28 |       rspec-expectations (~> 2.9.0)
29 |       rspec-mocks (~> 2.9.0)
30 |     rspec-core (2.9.0)
31 |     rspec-expectations (2.9.1)
32 |       diff-lcs (~> 1.1.3)
33 |     rspec-mocks (2.9.0)
34 |     simplecov (0.7.1)
35 |       multi_json (~> 1.0)
36 |       simplecov-html (~> 0.7.1)
37 |     simplecov-html (0.7.1)
38 |     thor (0.17.0)
39 | 
40 | PLATFORMS
41 |   ruby
42 | 
43 | DEPENDENCIES
44 |   coveralls
45 |   job_interview!
46 |   rake (~> 10.0.3)
47 |   rspec (~> 2.9.0)
48 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
  1 |                     GNU GENERAL PUBLIC LICENSE
  2 |                        Version 3, 29 June 2007
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--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # Job Interview
  2 | 
  3 | [![Build Status](https://secure.travis-ci.org/ruby-jokes/job_interview.png?branch=master)](http://travis-ci.org/ruby-jokes/job_interview)
  4 | [![Dependency Status](https://gemnasium.com/ruby-jokes/job_interview.png)](https://gemnasium.com/ruby-jokes/job_interview)
  5 | [![Code Climate](https://codeclimate.com/github/ruby-jokes/job_interview.png)](https://codeclimate.com/github/ruby-jokes/job_interview)
  6 | [![Coverage Status](https://coveralls.io/repos/ruby-jokes/job_interview/badge.png?branch=master)](https://coveralls.io/r/ruby-jokes/job_interview)
  7 | [![Gem Version](https://badge.fury.io/rb/job_interview.png)](http://badge.fury.io/rb/job_interview)
  8 | 
  9 | ## SYNOPSIS
 10 | 
 11 | Let's face it. Programmer job interviews can be annoying. And sometimes the questions require you to actually think. With Job Interview, most programming interview questions can be answered in 3 lines of Ruby.
 12 | 
 13 | You can view the slides from our RailsConf 2012 lightning talk about job_interview [here](http://ruby-jokes.github.com/job_interview/pres.html).
 14 | 
 15 | ## USAGE
 16 | 
 17 | ```ruby
 18 | require 'job_interview'
 19 | @answer = JobInterview::Answer.new
 20 | 
 21 | # FizzBuzz
 22 | @answer.fizz_buzz(5)
 23 |  => [1, 2, "Fizz", 4, "Buzz"]
 24 | 
 25 | # Fibonacci numbers (default: recursive strategy)
 26 | @answer.fib(10)
 27 |  => [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
 28 |  
 29 | # Fibonacci numbers (iterative strategy)
 30 | @answer.fib(10, :iterative)
 31 |  => [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
 32 |  
 33 | # Fibonacci numbers (using matrices)
 34 | @answer.fib(10, :matrix)
 35 |  => [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
 36 | 
 37 | # Quine
 38 | @answer.quine
 39 |  => "@answer.quine"
 40 | 
 41 | # The first n primes
 42 | @answer.primes(10)
 43 |  => [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
 44 | 
 45 | # Hello, World!
 46 | @answer.hello_world
 47 |  => "Hello, World!"
 48 | 
 49 | # Knapsack problem
 50 | @answer.knapsack([[4, 3], [1, 2], [6, 4]], 7)
 51 |  => 6
 52 | ```
 53 | 
 54 | Now, job_interview will help you answer non-technical interview questions as well! Simply call the appropriate method, and a randomly constructed answer will pop out.
 55 | 
 56 | ```ruby
 57 | include JobInterview::Questions
 58 | ```
 59 | 
 60 | Q. Where do you see yourself in five years?
 61 | 
 62 | ```ruby
 63 | in_5_years
 64 | 
 65 |  => "I'd like to have made someone else rich with my re-contextualized non-volatile open architecture."
 66 | ```
 67 | 
 68 | Q. Why are you leaving your current position?
 69 | 
 70 | ```ruby
 71 | leaving_current
 72 | 
 73 |  => "I'm seeking to optimize extensible applications."
 74 | ```
 75 | 
 76 | Q.  Why are manhole covers round?
 77 | 
 78 | ```ruby
 79 | manhole_cover
 80 | 
 81 |  => "Because Reuleaux Triangles are hard to manufacture."
 82 | ```
 83 | 
 84 | Q.  What is you greatest weakness?
 85 | 
 86 | ```ruby
 87 | greatest_weakness
 88 | 
 89 |  => "I always fail so rarely so I make too much money."
 90 | ```
 91 | 
 92 | Q. Why do you want to work here?
 93 | 
 94 | ```ruby
 95 | why_here
 96 | 
 97 |  => "Your company has revolutionized seamless next generation interface."
 98 | ```
 99 | 
100 | Q. Does P = NP?
101 | 
102 | ```ruby
103 | p_equals_np
104 | 
105 |  => "I doubt it, but it would make life easier for traveling salesmen."
106 | ```
107 | 
108 | Q. Please tell us, in a few words, about what interests you?
109 | 
110 | ```ruby
111 | what_interest
112 | 
113 |  => "I have a special interest in modular mobile startup platforms."
114 | ```
115 | 
116 | ## FAQ
117 | 
118 |   Q. Why would you even do this?
119 | 
120 |   A. We wanted to hack on something trivial and silly at BohConf 2012. Also, most job interviews are dumb, and we felt the need to point this out.
121 | 
122 |   Q. Do you expect this of be of any use to anyone, ever?
123 | 
124 |   A. No.
125 | 
126 |   Q. So what's next?
127 | 
128 |   A. The Ruby implementation of job_interview is pretty decent at this point, we think. But maybe you're not applying for a Ruby job. So a Clojure implementation seems likely, possibly to be followed by JavaScript.
129 | 
130 | ## How do I get it?
131 | 
132 | [At RubyGems, of course](http://rubygems.org/gems/job_interview)
133 | 
134 | ## AUTHORS
135 | 
136 | [Micah Gates](https://github.com/mgates)
137 | 
138 | [Jason Lewis](https://github.com/canweriotnow)
139 | 
140 | ## Contributions by:
141 | 
142 | [intolerable](https://github.com/intolerable)
143 | 
144 | [Joel Parker Henderson](https://github.com/joelparkerhenderson)
145 | 
146 | The authors would also like to thank:
147 | 
148 | - Carlos León [@mongrelion](https://twitter.com/mongrelion)
149 | - [Faker](http://faker.rubyforge.org/), the funniest placeholder gem
150 | 
151 | ## CONTRIBUTING
152 | 
153 | Really? You have that much time on your hands? Awesome!
154 | 
155 | Two guidelines, though:
156 | 
157 | - Please include a test for any patches you submit. Job interviews are Serious Business, and we need to make sure the code is correct.
158 | - We're not that into adding more questions to `JobInterview::Questions`. So please don't target that module unless you're certain your patch is SUPER funny.
159 | 
160 | ## LICENSE
161 | 
162 | 
163 | Copyright (C) 2012 Micah Gates and Jason Lewis
164 | 
165 | This program is free software: you can redistribute it and/or modify
166 | it under the terms of the GNU General Public License as published by
167 | the Free Software Foundation, either version 3 of the License, or
168 | (at your option) any later version.
169 | 
170 | This program is distributed in the hope that it will be useful,
171 | but WITHOUT ANY WARRANTY; without even the implied warranty of
172 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
173 | GNU General Public License for more details.
174 | 
175 | You should have received a copy of the GNU General Public License
176 | along with this program.  If not, see <http://www.gnu.org/licenses/>.
177 | 


--------------------------------------------------------------------------------
/Rakefile:
--------------------------------------------------------------------------------
 1 | # Get your spec rake tasks working in RSpec 2.0
 2 | 
 3 | require 'rspec/core/rake_task'
 4 | 
 5 | desc 'Default: run specs.'
 6 | task :default => :spec
 7 | 
 8 | desc "Run specs"
 9 | RSpec::Core::RakeTask.new do |t|
10 |   t.pattern = "./spec/**/*_spec.rb" # don't need this, it's default.
11 |   # Put spec opts in a file named .rspec in root
12 | end
13 | 
14 | desc "Generate code coverage"
15 | RSpec::Core::RakeTask.new(:coverage) do |t|
16 |   t.pattern = "./spec/**/*_spec.rb" # don't need this, it's default.
17 |   t.rcov = true
18 |   t.rcov_opts = ['--exclude', 'spec']
19 | end


--------------------------------------------------------------------------------
/job_interview.gemspec:
--------------------------------------------------------------------------------
 1 | Gem::Specification.new do |s|
 2 |   s.name          = 'job_interview'
 3 |   s.version       = '0.1.6'
 4 |   s.summary       = 'Programmer job interview answers, packaged for your convenience'
 5 |   s.description   = 'Programmer job interview answers, packaged for your convenience. Fibonacci, FizzBuzz, and more! A project from BohConf 2012.'
 6 |   s.authors       = ["Micah Gates", "Jason Lewis"]
 7 |   s.email         = ["github@mgates.com", "jason@decomplecting.org"]
 8 |   s.homepage      = "http://ruby-jokes.github.com/job_interview"
 9 |   s.files         = [ 'lib/job_interview.rb', 
10 |                       'lib/job_interview/fibonacci.rb',
11 |                       'lib/job_interview/fizz_buzz.rb',
12 |                       'lib/job_interview/knapsack.rb',
13 |                       'lib/job_interview/answer.rb',
14 |                       'lib/job_interview/hello_world.rb',
15 |                       'lib/job_interview/questions.rb',
16 |                       'lib/job_interview/primes.rb',
17 |                       'lib/job_interview/quine.rb']
18 |   s.add_runtime_dependency 'faker', '~> 0.9.5'
19 |   s.add_development_dependency 'rspec', '~> 2.9.0'
20 |   s.add_development_dependency 'rake', '~> 10.0.3'
21 |   s.test_files    = Dir.glob('spec/*_spec.rb')
22 |   s.license       = 'GPLv3'
23 | end


--------------------------------------------------------------------------------
/lib/job_interview.rb:
--------------------------------------------------------------------------------
 1 | require File.expand_path('../job_interview/fizz_buzz', __FILE__)
 2 | require File.expand_path('../job_interview/fibonacci', __FILE__)
 3 | require File.expand_path('../job_interview/hello_world', __FILE__)
 4 | require File.expand_path('../job_interview/knapsack' , __FILE__)
 5 | require File.expand_path('../job_interview/quine' , __FILE__)
 6 | require File.expand_path('../job_interview/primes' , __FILE__)
 7 | require File.expand_path('../job_interview/questions' , __FILE__)
 8 | require File.expand_path('../job_interview/answer' , __FILE__)
 9 | module JobInterview
10 | end
11 | 


--------------------------------------------------------------------------------
/lib/job_interview/answer.rb:
--------------------------------------------------------------------------------
 1 | module JobInterview
 2 |   
 3 |   class Answer
 4 |     include JobInterview::Fibonacci
 5 |     include JobInterview::FizzBuzz
 6 |     include JobInterview::HelloWorld
 7 |     include JobInterview::Knapsack
 8 |     include JobInterview::Primes
 9 |     include JobInterview::Quine
10 |   end
11 |   
12 |   
13 | end


--------------------------------------------------------------------------------
/lib/job_interview/fibonacci.rb:
--------------------------------------------------------------------------------
 1 | require 'matrix'
 2 | module JobInterview
 3 |   module Fibonacci
 4 | 
 5 |     ##
 6 |     # args should be the strategy to be used (one of :iterative, :recursive)
 7 |     # Defaults to recursive
 8 |     #
 9 |     def fib(n, *args)
10 |       if args && args.include?(:iterative)
11 |         iterative_fib(n)
12 |       elsif args && args.include?(:matrix)
13 |         matrix_fib(n)
14 |       else
15 |         ## TODO: make this efficient
16 |         return Array.new(n) {|i| recursive_fib(i + 1) }
17 | 
18 |       end
19 | 
20 |     end
21 | 
22 |    private
23 |    def recursive_fib(n)
24 |       return n if (0..1).include? n
25 |       recursive_fib(n-1) + recursive_fib(n-2)
26 |    end
27 | 
28 |     def iterative_fib(n)
29 |       result = [1, 1]
30 | 
31 |       (n - 2) .times do |i|
32 |         result <<  result[-1] + result[-2]
33 |       end
34 | 
35 |       return result
36 |     end
37 |     
38 |     def matrix_fib(n)
39 |       1.upto(n).map do |i|
40 |         fibonacci_matrix = Matrix[[1,1],[1,0]]
41 |         (fibonacci_matrix**(i-1)) [0,0]
42 |       end
43 |     end
44 | 
45 |   end
46 | end
47 | 


--------------------------------------------------------------------------------
/lib/job_interview/fizz_buzz.rb:
--------------------------------------------------------------------------------
 1 | module JobInterview
 2 |   module FizzBuzz
 3 | 
 4 |     def fizz_buzz(max)
 5 |       Array.new(max) do |i|
 6 |         j = i + 1
 7 |         val  = (j % 3 == 0 ? "Fizz" : "") +
 8 |         (j % 5 == 0 ? "Buzz" : "")
 9 |         val.empty? ?  j.to_s  : val
10 |       end
11 |     end
12 |   end
13 | end
14 | 


--------------------------------------------------------------------------------
/lib/job_interview/hello_world.rb:
--------------------------------------------------------------------------------
 1 | module JobInterview
 2 |   module HelloWorld
 3 |     
 4 |     
 5 |     def hello_world
 6 |       "Hello, World!"
 7 |     end
 8 |     
 9 |   end
10 |   
11 | end


--------------------------------------------------------------------------------
/lib/job_interview/knapsack.rb:
--------------------------------------------------------------------------------
 1 | module JobInterview
 2 |   module Knapsack
 3 | 
 4 |     # Given a set of items, each with a weight and a value, determines
 5 |     # the maximum profit you can have while keeping the overall weight
 6 |     # smaller than the capacity of the knapsack.
 7 |     #
 8 |     # @param items [Array<Array>] An array of pairs (weight, profit) representing the items
 9 |     # @param capacity [Integer] The capacity of the knapsack
10 |     # @param algorithm [:memoize, :dynamic] The algorithm used to solve this, defaults to :dynamic
11 |     #
12 |     def knapsack(items, capacity, algorithm = :dynamic)
13 |       if algorithm == :memoize
14 |         knapsack_memoize(items, capacity)
15 |       elsif algorithm == :dynamic
16 |         knapsack_dynamic_programming(items, capacity)
17 |       end
18 |     end
19 | 
20 |     private
21 | 
22 |     def knapsack_memoize(items, capacity)
23 |       cache = Array.new(items.length + 1) { [0] }
24 |       cache[0] = Array.new(capacity + 1, 0)
25 |       knapsack_memoize_recursive(items, capacity, items.length, cache)
26 |     end
27 | 
28 |     def knapsack_dynamic_programming(items, capacity)
29 |       cache = Array.new(items.length + 1) { [0] }
30 |       cache[0] = Array.new(capacity + 1, 0)
31 | 
32 |       (0..capacity).each do |remaining_weight|
33 |         items.each_with_index do |item, index|
34 |           weight, profit = item
35 |           cache[index + 1][remaining_weight] = if weight <= remaining_weight then
36 |             [
37 |               profit + cache[index][remaining_weight - weight], # Take item
38 |               cache[index][remaining_weight] # Don't take item
39 |             ].max
40 |           else
41 |             cache[index][remaining_weight] # Don't take item
42 |           end
43 |         end
44 |       end
45 | 
46 |       cache[items.length][capacity]
47 |     end
48 | 
49 |     def knapsack_memoize_recursive(items, capacity, position, cache)
50 |       return cache[position][capacity] if cache[position][capacity]
51 | 
52 |       weight, profit = items[position - 1]
53 | 
54 |       cache[position][capacity] = if weight <= capacity then
55 |         [
56 |           profit + kmr(items, capacity - weight, position - 1, cache), # Take item
57 |           kmr(items, capacity, position - 1, cache) # Don't take item
58 |         ].max
59 |       else
60 |         kmr(items, capacity, position - 1, cache) # Don't take item
61 |       end
62 | 
63 |       cache[position][capacity]
64 |     end
65 |     alias_method :kmr, :knapsack_memoize_recursive
66 |   end
67 | end
68 | 


--------------------------------------------------------------------------------
/lib/job_interview/primes.rb:
--------------------------------------------------------------------------------
 1 | require 'prime'
 2 | 
 3 | module JobInterview
 4 |   module Primes
 5 |     
 6 |     def primes(n)
 7 |       Prime.each.take(n)
 8 |     end
 9 |     
10 |   end
11 | end
12 | 


--------------------------------------------------------------------------------
/lib/job_interview/questions.rb:
--------------------------------------------------------------------------------
 1 | require 'faker'
 2 | module JobInterview
 3 |   module Questions
 4 | 
 5 |     def in_5_years
 6 |       "I'd " + %W[like love hope].sample + " to " +
 7 |         [
 8 |           "have made",
 9 |           "have enhanced shareholder value by creating",
10 |           "made someone else rich with my"
11 |         ].sample + " " +
12 |         Faker::Company.catch_phrase.downcase + "."
13 |     end
14 | 
15 |     def leaving_current
16 |       "I'm " +
17 |         [
18 |           "seeking to",
19 |           "leaving because I can't" ,
20 |           "leaving because I have to",
21 |           "not happy with the opportunities I have to"
22 |         ].sample + " " +
23 |         Faker::Company.bs + "."
24 |     end
25 | 
26 |     def manhole_cover
27 |       [
28 |         "Because men are round.",
29 |         "Because manholes are round.",
30 |         "So they don't fall in.",
31 |         "Because Reuleaux Triangles are hard to manufacture."
32 |       ].sample
33 | 
34 |     end
35 | 
36 |     def greatest_weakness
37 |       ["Some times I", "I always"].sample + " " +
38 |       ["try too hard", "work too much", "care too much", "fail so rarely"].sample  + " " +
39 |       "so I " +
40 |       [ "make others jealous",
41 |         "make too much money",
42 |         "shift too many paradigms",
43 |         "innovate too hard"].sample + "."
44 |     end
45 | 
46 |     def why_here
47 |       "Your company " +
48 |       [ "is renowned for",
49 |         "is re-inventing",
50 |         "has revolutionized"
51 |       ].sample + " " + Faker::Company.catch_phrase.downcase + "."
52 |     end
53 | 
54 |     def what_experience(thing)
55 |       "I am " +
56 |       [
57 |         "a world-renowned expert in ",
58 |         "highly proficient with ",
59 |         "exquisitely competent at ",
60 |         "known as an ultimate authority on "
61 |         ].sample + thing + "."
62 |     end
63 | 
64 |     def what_interest
65 |       "I have a special interest in " +
66 |         ["scalable ", "modular ", "distributed "].sample +
67 |         ["mobile ", "social ", "global ", "local "].sample +
68 |         ["business ", "consumer ", "startup ", "enterprise "].sample +
69 |         ["applications.", "frameworks.", "platforms.", "services."].sample
70 |     end
71 | 
72 |     def p_equals_np
73 |       [
74 |         "If it does, we can kiss encryption goodbye.",
75 |         "With our current models of computation, answering that question remains infeasible.",
76 |         "I doubt it, but it would make life easier for traveling salesmen.",
77 |         "Sure! P = 0 or N = 1!"
78 |       ].sample
79 |     end
80 | 
81 |   end
82 | end
83 | 


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/lib/job_interview/quine.rb:
--------------------------------------------------------------------------------
 1 | module JobInterview
 2 |   module Quine
 3 |     
 4 |     def quine(file = nil)
 5 |       file ||= caller.first.split(':').first
 6 |       return File.read(file)
 7 |     end
 8 |     
 9 |   end
10 | end


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/spec/fibonacci_spec.rb:
--------------------------------------------------------------------------------
 1 | require "spec_helper.rb"
 2 | module FibonacciSpec
 3 | 
 4 |   describe "When called" do
 5 |     before(:each) do
 6 |       @answer = JobInterview::Answer.new
 7 |     end
 8 | 
 9 |     it "should return the fibinacci sequence in iterative mode" do
10 |       @answer.fib(10, :iterative).should == [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
11 |     end
12 | 
13 |     it "should return the fibinacci sequence in matrix mode" do
14 |       @answer.fib(10, :matrix).should == [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
15 |     end
16 | 
17 |     it "should return the fibinacci sequence in recursive mode" do
18 |       @answer.fib(10).should == [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
19 |     end
20 |   end
21 | 
22 | 
23 | end
24 | 


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/spec/fizz_buzz_spec.rb:
--------------------------------------------------------------------------------
 1 | require 'spec_helper'
 2 | 
 3 | module FizzBuzzSpec
 4 | 
 5 |   describe "When called" do
 6 |     before(:each) do
 7 |       @answer = JobInterview::Answer.new
 8 |     end
 9 | 
10 |     it "returns a list of numbers up to n" do
11 |       @answer.fizz_buzz(5).size.should eq(5)
12 |     end
13 | 
14 |     it "should replace 3 with 'Fizz'" do
15 |       @answer.fizz_buzz(3).last.should eq("Fizz")
16 |     end
17 | 
18 |     it "should replace 5 with 'Buzz'" do
19 |       @answer.fizz_buzz(5).last.should eq("Buzz")
20 |     end
21 | 
22 |     it "should replace 15 with 'FizzBuzz'" do
23 |       @answer.fizz_buzz(15).last.should eq("FizzBuzz")
24 |     end
25 | 
26 |   end
27 | end
28 | 


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/spec/hello_world_spec.rb:
--------------------------------------------------------------------------------
 1 | require 'spec_helper'
 2 | 
 3 | module HelloWorldSpec
 4 |   
 5 |   describe "When called" do
 6 |     before(:each) do
 7 |       @answer = JobInterview::Answer.new
 8 |     end
 9 |     
10 |     it "should print 'Hello, World!'" do
11 |       @answer.hello_world.should == "Hello, World!"
12 |     end
13 |     
14 |   end
15 |   
16 | end


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/spec/knapsack_spec.rb:
--------------------------------------------------------------------------------
 1 | require 'spec_helper'
 2 | 
 3 | module KnapsackSpec
 4 | 
 5 |   describe "When called" do
 6 |     before(:each) do
 7 |       @answer = JobInterview::Answer.new
 8 |       @items = [
 9 |         [4, 3],
10 |         [1, 2],
11 |         [12, 20],
12 |         [6, 4]
13 |       ]
14 |     end
15 | 
16 |     cases = [
17 |       [0, 0],
18 |       [1, 2],
19 |       [2, 2],
20 |       [3, 2],
21 |       [4, 3],
22 |       [5, 5],
23 |       [6, 5],
24 |       [7, 6],
25 |       [8, 6],
26 |       [9, 6],
27 |       [10, 7],
28 |       [11, 9],
29 |       [12, 20],
30 |       [100, 29]
31 |     ]
32 | 
33 |     cases.each do |capacity, profit|
34 |       it "should return #{profit} in memoize mode with capacity #{capacity}" do
35 |         @answer.knapsack(@items, capacity, :memoize).should == profit
36 |       end
37 | 
38 |       it "should return #{profit} in dynamic programming mode with capacity #{capacity}" do
39 |         @answer.knapsack(@items, capacity, :dynamic).should == profit
40 |       end
41 |     end
42 |   end
43 | end
44 | 


--------------------------------------------------------------------------------
/spec/primes_spec.rb:
--------------------------------------------------------------------------------
 1 | module PrimesSpec
 2 |   
 3 |   describe "when called" do
 4 |     before(:each) do
 5 |       @answer = JobInterview::Answer.new
 6 |     end
 7 |     
 8 |     
 9 |     it "should return the first n primes" do
10 |       @answer.primes(10).should == [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
11 |     end
12 |     
13 |   end
14 |   
15 | end


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/spec/questions_spec.rb:
--------------------------------------------------------------------------------
 1 | require "spec_helper.rb"
 2 | module QuestionsSpec
 3 |   include JobInterview::Questions
 4 | 
 5 |   class Dummy
 6 |   end
 7 | 
 8 |   describe "When called" do
 9 |     before(:each) do
10 |       @dummy = Dummy.new
11 |       @dummy.extend(JobInterview::Questions)
12 |     end
13 | 
14 |     def is_correct_answer(type, answer)
15 |       if answer.respond_to? :wrong
16 |         return false
17 |       else
18 |         return true
19 |       end
20 |     end
21 | 
22 |     %W[in_5_years leaving_current manhole_cover greatest_weakness why_here p_equals_np what_interest].each do |m|
23 |       it "should return the right answer for #{m}" do
24 |         answer = @dummy.send(m)
25 |         is_correct_answer(m, answer).should be_true
26 |       end
27 | 
28 |     end
29 |   end
30 | 
31 | 
32 | end
33 | 


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/spec/quine_spec.rb:
--------------------------------------------------------------------------------
 1 | require "spec_helper.rb"
 2 | module QuineSpec
 3 | 
 4 |   describe "When called" do
 5 |     before(:each) do
 6 |       @answer = JobInterview::Answer.new
 7 |     end
 8 | 
 9 |     it "should return the source of the calling file" do
10 |       @answer.quine(__FILE__).should == File.read(__FILE__)
11 |     end
12 | 
13 |     it "should find the calling file if not given" do
14 |       @answer.quine.should == File.read(__FILE__)
15 |     end
16 |   end
17 | 
18 | 
19 | end
20 | 


--------------------------------------------------------------------------------
/spec/spec_helper.rb:
--------------------------------------------------------------------------------
1 | require File.expand_path("../../lib/job_interview", __FILE__)
2 | 
3 | require 'coveralls'
4 | Coveralls.wear!
5 | 
6 | 


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