first commit

.gitignore

@@ -0,0 +1 @@
+.c9/

series-A/count_in_list.rb

@@ -16,12 +16,19 @@
 
 def count_in_list(list, item_to_count)
   # You'll need three things:
-  #  1. A running total of the number of times you've seen the item
-  #  2. A way to loop/iterate through the list
-  #  3. A way to add to the running total as you see the item
+  count = 0 #  1. A running total of the number of times you've seen the item
+  list.each do |item| #  2. A way to loop/iterate through the list
+    if item == item_to_count
+      count += 1   #  3. A way to add to the running total as you see the item
+    end
+  end
+  return count
 end
 
 if __FILE__ == $0
   # I'd advise putting some sanity checks here.
   # How else will you be sure your code does what you think it does?
+p count_in_list([1,2,3], 1)  == 1
+p count_in_list([1,2,3], -1) == 0
+p count_in_list([1,1,1], 1)  == 3
 end

series-A/count_max.rb

@@ -21,9 +21,13 @@ def count_max(list)
   # trying. The "requite_relative" statements above make them available to us, here.
   #
   # But remember: inelegant, working code is better than elegant, unfinished code.
+  max_num = max(list)
+  count = count_in_list(list, max_num)
+  return count
 end
 
 if __FILE__ == $0
   # I'd advise putting some sanity checks here.
   # How else will you be sure your code does what you think it does?
+  p count_max([10, 1,2,10,10]) == 3
 end

series-A/longest_string.rb

@@ -13,9 +13,17 @@
 
 def longest_string(list)
   # This is your job. :)
+  saved = list.first
+  list.each do |item|
+    if item.length > saved.length
+      saved = item
+    end
+  end
+  return saved
 end
 
 if __FILE__ == $0
   # I'd advise putting some sanity checks here.
+  p longest_string(['Nina', 'school', 'outmost']) == 'outmost'
   # How else will you be sure your code does what you think it does?
 end

series-A/mean.rb

@@ -23,10 +23,14 @@
 
 def mean(list)
   total = sum(list) # This is the "sum" method from our sum.rb file
-  # result = ____   # Given we have the sum of the list, how can we calculate the average?
+  result = total/list.length   # Given we have the sum of the list, how can we calculate the average?
+  return result
 end
 
 if __FILE__ == $0
   # I'd advise putting some sanity checks here.
   # How else will you be sure your code does what you think it does?
+  p mean([Float(5), Float(2)]) == 3.5 
+  p mean([5 , 5]) == 5.0 
+  p mean([10, 20, 30]) == 20.0 
 end

series-A/min.rb

@@ -13,14 +13,14 @@
 # This is going to be very similar to max, so don't be afraid if
 # these two methods look almost identical
 def min(list)
-  ____ = ____
-  ____.each do |____|
-    if ____
-      ____ = ____
+  min_so_far = list.first
+  list.each do |num|
+    if num < min_so_far
+      min_so_far = num
     end
   end
 
-  return ____
+  return min_so_far
 end
 
 if __FILE__ == $0

series-A/print_horizontal_pyramid.rb

@@ -10,7 +10,27 @@
 #  *****
 # *******
 
+def print_line(count)
+  (1..count).each do |i| # or, equivalently, for i in (1..count)
+    print "*"            # This prints a single "*"
+  end
+end
+
+def print_line_of_spaces(count)
+  (1..count).each do |i| # or, equivalently, for i in (1..count)
+    print " "            # This prints a single "*"
+  end
+end
+
 def print_horizontal_pyramid(height)
+    count = height
+    (1..height).each do |r|
+        count -= 1
+        print_line_of_spaces(count)
+        print_line(r)
+        print_line(r-1)
+        print "\n"             # This forces the output to the next like, like hitting "return" on the keyboard
+    end
 end
 
 if __FILE__ == $0

series-A/print_pyramid.rb

@@ -23,9 +23,27 @@ def print_pyramid(height)
   # This is your job. :)
   # Suggestion: you can call print_triangle to print out the first, "upward" half of the pyramid
   # You'll have to write code to print out the second, "downward" half of the pyramid.
+  print_triangle(height)
+  while height > 1 do
+    height -=1
+    print_line(height)
+  end
 end
 
 if __FILE__ == $0
   # I'd advise putting some sanity checks here.
   # How else will you be sure your code does what you think it does?
+  print_pyramid(1)
+
+  print "\n\n\n" # This is here just to make the separation between triangles clearer
+
+  print_pyramid(2)
+
+  print "\n\n\n" # This is here just to make the separation between triangles clearer
+
+  print_pyramid(3)
+
+  print "\n\n\n" # This is here just to make the separation between triangles clearer
+
+  print_pyramid(10)
 end

series-A/print_square.rb

@@ -26,7 +26,7 @@ def print_line(count)
 # to call the print_line method we've defined to help us print out a square.
 def print_square(dimension)
   (1..dimension).each do |i| # or, equivalently, for i in (1..dimension)
-    print_line(____)         # Fill in the blank, here.
+    print_line(dimension)         # Fill in the blank, here.
   end
 end
 

series-A/print_triangle.rb

@@ -23,6 +23,9 @@ def print_line(count)
 
 def print_triangle(height)
   # You have to fill in the details here.
+  (1..height).each do |i|
+    print_line(i)
+  end
 end
 
 # There are no rumble strips this time.  It's up to you to decide whether

series-A/shortest_string.rb

@@ -5,9 +5,18 @@
 
 def shortest_string(list)
   # This is your job. :)
+  saved = list.first
+  list.each do |item|
+    if item.length < saved.length
+      saved = item
+    end
+  end
+  return saved
 end
 
 if __FILE__ == $0
   # I'd advise putting some sanity checks here.
   # How else will you be sure your code does what you think it does?
+  p shortest_string(['Nina', 'school', 'outmost']) == 'Nina'
+  p shortest_string(['a', 'ab', 'abc']) == 'a'
 end

series-A/sum.rb

@@ -21,6 +21,11 @@
 
 def sum(list)
   # This is your job. :)
+  total = 0
+  list.each do |item|
+    total += item
+  end
+  return total
 end
 
 if __FILE__ == $0

series-A/word_count.rb

@@ -11,6 +11,8 @@
 def word_count(string)
   # Hint: You'll want to use String#split
   # See: http://www.ruby-doc.org/core-2.1.2/String.html#method-i-split
+  str = string.split(' ')
+  return str.length
 end
 
 if __FILE__ == $0