vanhalt · December 18, 2015 20:59 · Aug 29, 2013 · Aug 29, 2013 · Jul 23, 2013 · Jun 23, 2013
diff --git a/fizz_buzz.rb b/fizz_buzz.rb
@@ -1,6 +1,6 @@
 [*1..100].each do |number|
   text = ""
-  text << "fist " if number % 3 == 0
+  text << "fizz " if number % 3 == 0
   text << "buzz " if number % 5 == 0
   unless text.empty?
     puts text

diff --git a/first_boost.rb → fizz_buzz.rb b/first_boost.rb → fizz_buzz.rb
@@ -1,7 +1,7 @@
 [*1..100].each do |number|
   text = ""
   text << "fist " if number % 3 == 0
-  text << "boost " if number % 5 == 0
+  text << "buzz " if number % 5 == 0
   unless text.empty?
     puts text
   else

diff --git a/first_boost.rb b/first_boost.rb
@@ -0,0 +1,10 @@
+[*1..100].each do |number|
+  text = ""
+  text << "fist " if number % 3 == 0
+  text << "boost " if number % 5 == 0
+  unless text.empty?
+    puts text
+  else
+    puts number
+  end
+end
diff --git a/index_sort.rb b/index_sort.rb
@@ -0,0 +1,10 @@
+class IndexSort
+  def self.sort(ary, ascend=true)
+    ary_ = []
+    ary.each do |num|
+      ary_[num] = num
+    end
+    ary_ = ary_.select { |value| !value.nil? }
+    ascend ? ary_ : ary_.reverse
+  end
+end
diff --git a/linked_list.rb b/linked_list.rb
@@ -29,16 +29,16 @@ def contents
     @hsh.values.collect(&:content)
   end
 
-  def unlinked?(item)
+  def deleted?(item)
     item.prev.nil? && item.next.nil?
   end
 
   def last
-    @hsh.each_pair.select { |index, item | !unlinked?(item) && item.next.nil? }.first.last.content
+    @hsh.each_pair.select { |index, item | !deleted?(item) && item.next.nil? }.first.last.content
   end
 
   def first
-    @hsh.each_pair.select { |index, item | !unlinked?(item) && item.prev.nil? }.first.last.content
+    @hsh.each_pair.select { |index, item | !deleted?(item) && item.prev.nil? }.first.last.content
   end
 
 private

diff --git a/linked_list.rb b/linked_list.rb
@@ -7,10 +7,14 @@ def initialize(content)
     @hsh[0].content = content
   end
 
-  def add(content)
-    index = @hsh.length
-    @hsh[index-1].next = index if index > 1
-    @hsh[index] = ITEM.new(index-1, nil, content)
+  def add(element)
+    if element.instance_of? LinkedList
+      element.contents.each do |value|
+        add_content value
+      end
+    else
+      add_content element
+    end
   end
 
   def delete(index)
@@ -36,4 +40,11 @@ def last
   def first
     @hsh.each_pair.select { |index, item | !unlinked?(item) && item.prev.nil? }.first.last.content
   end
+
+private
+  def add_content(content)
+    index = @hsh.length
+    @hsh[index-1].next = index if index > 1
+    @hsh[index] = ITEM.new(index-1, nil, content)
+  end
 end
diff --git a/linked_list.rb b/linked_list.rb
@@ -0,0 +1,39 @@
+class LinkedList
+  ITEM = Struct.new :prev, :next, :content
+
+  def initialize(content)
+    @hsh = {}
+    @hsh[0] = ITEM.new(nil, nil, content)
+    @hsh[0].content = content
+  end
+
+  def add(content)
+    index = @hsh.length
+    @hsh[index-1].next = index if index > 1
+    @hsh[index] = ITEM.new(index-1, nil, content)
+  end
+
+  def delete(index)
+    item = @hsh[index]
+    @hsh[item.prev].next = item.next
+    @hsh[item.next].prev = item.prev
+    item.prev = nil
+    item.next = nil
+  end
+
+  def contents
+    @hsh.values.collect(&:content)
+  end
+
+  def unlinked?(item)
+    item.prev.nil? && item.next.nil?
+  end
+
+  def last
+    @hsh.each_pair.select { |index, item | !unlinked?(item) && item.next.nil? }.first.last.content
+  end
+
+  def first
+    @hsh.each_pair.select { |index, item | !unlinked?(item) && item.prev.nil? }.first.last.content
+  end
+end