Tehut Getahun

white_board.rb

@@ -0,0 +1,66 @@
+require 'pry'
+
+
+def print_array(array)
+
+  string = ""
+  array.each{|number| string += "#{number},"}
+  string = "["+ string
+  string[-1] = "]"
+  print  string
+
+end
+
+
+
+
+
+def stretch(array)
+  stretch = []
+  array.each do |number|
+    if number % 2 == 0
+      2.times{stretch << number/2}
+    else
+      stretch << number/2 + 1
+      stretch << number/2
+    end
+  end
+  print stretch
+
+end
+
+
+def numUnique(array)
+  hash = {}
+  array.each_with_index do |num,index|
+    if array[index] != array[index-1]
+      hash[num] = 1
+    else
+      hash[num] += 1
+    end
+  end
+  return hash.length
+
+end
+
+
+# I spent an extra two days on this because I lost scope of the problem entirely.  I thought I was
+#trying to return the array without duplicates and not the length.  
+def numUnique2(array)
+  unique = 0
+   array.each_with_index do |num,index|
+    if array[index] == array[index+1]
+      unique = unique
+    elsif array[index] != array[index+1]
+      unique += 1
+    end
+end
+
+
+
+return unique
+
+end
+
+list = 2,3,3,4,5,6,7,7,8
+print numUnique2(list)