Nick White - Week 2 Ignition Assignment - Ruby

deliverables/README.md

@@ -2,7 +2,9 @@
 ###Intro to the Back End
 ####Required
 What is the difference between front- and back-end development?<br>
-Why do you need to install Ruby but not HTML/CSS?
+Front-end is what a user can see and use. The back-end is the naughty bits doing all the dirty work behind the scenes<br>
+Why do you need to install Ruby but not HTML/CSS?<br>
+Ummmmm....... I pass?
 
 Read the [intro to back end on the Odin Project](http://www.theodinproject.com/web-development-101/introduction-to-the-back-end) description, and the [What is: Back-end web development](http://blog.generalassemb.ly/what-is-back-end-web-development/) blog post.
 
@@ -12,16 +14,28 @@ Sign Up for Cloud9 and create a basic Rails project.
 ####Required
 
 What is an "interpreted" language?<br>
+A language that can be implemented/executed immediately without the use of a compiler<br>
 What is IRB?<br>
+Interactive Ruby Shell<br>
 What are Objects?<br>
+An abstract data type with abilities like inheritance<br>
 What are Methods?<br>
+Functions... Don't know why they're not named functions<br>
 What are Classes?<br>
+A template for creating objects<br>
 What are Blocks?<br>
+Groups of code essentially<br>
 What is an Array?<br>
+A series of objects grouped together providing easy data manipulation, vector/pointer use, etc...<br>
 What is an Iterator?<br>
+An object that traverses other objects like arrays or lists<br>
 What are hashes?<br>
+Applies keys/id's to data objects to ease searching, sorting and other functions<br>
 What is a library?<br>
-What is a gem?
+A collection of resources used by programs/programmers<br>
+What is a gem?<br>
+Rubygem..? Essentially a library for Ruby<br>
+
 
 Do the challenges at http://tryruby.org/levels/1/challenges/0.
 

deliverables/ruby_monk_problems/array_of_fixnums.rb

@@ -1,3 +1,7 @@
 def array_of_fixnums?(array)
-  # Write your code here
+  array.each do |x|
+    if !x.is_a? (Fixnum)
+      return false
+    end
+  end
 end

deliverables/ruby_monk_problems/calculator.rb

@@ -1,9 +1,9 @@
 class Calculator
   def add(a, b)
-   # your code here
+   a + b
   end
 
   def subtract(a, b)
-   # your code here
+   a - b
   end
 end

deliverables/ruby_monk_problems/color.rb

@@ -7,18 +7,20 @@ def initialize(r, g, b)
   end
 
   def brightness_index
-    # your code here
+    (299*r + 587*g + 114*b) / 1000   #why not @r, @g and @b
   end
 
   def brightness_difference(another_color)
-    #your code here
+    (brightness_index - another_color.brightness_index).abs
   end
 
   def hue_difference(another_color)
-    #your code here
+    (r - another_color.r).abs + (g - another_color.g).abs + (b - another_color.b).abs
   end
 
   def enough_contrast?(another_color)
-    # your code here
+    if brightness_difference(another_color) > 125 && hue_difference(another_color) > 500
+      return true
   end
+  return false   #Necessary?
 end

deliverables/ruby_monk_problems/exec_time.rb

@@ -1,3 +1,5 @@
 def exec_time(proc)
-  # your code here
-end
+  t = Time.now
+  proc.call
+  Time.now - t
+end

deliverables/ruby_monk_problems/find_frequency.rb

@@ -1,3 +1,3 @@
 def find_frequency(sentence, word)
-  # Your code here
+  sentence.downcase.split.count(word.downcase)
 end

deliverables/ruby_monk_problems/is_an_experienced_programmer.rb

@@ -1 +1,4 @@
-is_an_experienced_programmer = # Fill your expression here
+is_an_experienced_programmer = 
+candidate.languages_worked_with.include? 'Ruby') &&
+  (candidate.years_of_experience >= 2 || candidate.github_points >= 500) &&
+  ! (candidate.age < 15 || candidate.applied_recently?)

deliverables/ruby_monk_problems/kaprekar.rb

@@ -1,2 +1,9 @@
 def kaprekar?(k)
+	ksq = (k*k).to_s
+	digit = k.to_s.size
+
+	left = ksq.size.even? ? ksq[0..digit-1] : ksq[0..digit-2]
+	right = ksq[-digit..-1]
+
+	k == right.to_i + left.to_i
 end

deliverables/ruby_monk_problems/length_finder.rb

@@ -1,2 +1,3 @@
 def length_finder(input_array)
+	input_array.map {|i| i.length}
 end

deliverables/ruby_monk_problems/my_array.rb

@@ -6,6 +6,9 @@ def initialize(array)
   end
 
   def sum(initial_value = 0)
-    # your code here
+    return ___ unless block_given?
+    sum = initial_value
+    array.each {|x| sum += yield(x)}
+    sum
   end
 end

deliverables/ruby_monk_problems/non_duplicated_values.rb

@@ -1,3 +1,3 @@
 def non_duplicated_values(values)
-  # Write your code here
-end
+  values.find_all {|x| values.count(x) == 1}
+end

deliverables/ruby_monk_problems/number_shuffle.rb

@@ -1,3 +1,9 @@
 def number_shuffle(number)
-  # your code here
+  uniq_combos = number.to_s.size == 3 ? 6 : 24
+  digits = nunmber.to_s.split('')
+  combos = []
+  combos << digits.shuffle.join.to_i while 
+  	combos.uniq.sort != uniq_combos
+  combos.uniq.sort
+  end
 end

deliverables/ruby_monk_problems/palindrome.rb

@@ -1,3 +1,4 @@
 def palindrome?(sentence)
-  # Write your code here
-end
+  str1 == sentence.downcase.gsub(' ','')
+  str1 == str1.reverse
+end

deliverables/ruby_monk_problems/random_select.rb

@@ -1,3 +1,7 @@
 def random_select(array, n)
-  # your code here
+  ans = []
+  n.times do
+  	ans << array[rand(array.length)]
+  end
+  ans
 end

deliverables/ruby_monk_problems/restaurant.rb

@@ -4,6 +4,8 @@ def initialize(menu)
   end
 
   def cost(*orders)
-    # your code here
+    orders.inject(0) do |sum, ord|
+    	sum + ord.keys.inject(0) {|cost, key| cost + ord[key]*@menu[key]}
+    end
   end
 end

deliverables/ruby_monk_problems/sort_string.rb

@@ -1,3 +1,3 @@
 def sort_string(string)
-  # your code here
-end
+  string.split(' ').sort{|x, y|x.length<=>y.length}.join(' ')
+end

deliverables/ruby_monk_problems/sum_of_cubes.rb

@@ -1,3 +1,3 @@
 def sum_of_cubes(a, b)
-  # Write your code here
+  (a..b).inject(0) {|sum, num| sum + num*num*num}
 end