seanhandley · November 13, 2024 05:26 · Nov 13, 2024 · Nov 13, 2024
diff --git a/see_buildings_left.rb b/see_buildings_left.rb
@@ -4,17 +4,25 @@
 # it is taller than all the buildings to its left. The height of
 # the tallest building is included in the count.
 def see_buildings_left(buildings)
+  return 0 if buildings.empty?
+
   buildings.each_cons(2).inject(1) do |count, (a, b)|
-    return count if a > b
-    count += 1
+    count += 1 if a < b
+    count
   end
 end
 
+see_buildings_left([])
+=> 0
+
 see_buildings_left([1,2,3,4,5])
 # => 5
 
 see_buildings_left([5,4,3,2,1])
 # => 1
 
 see_buildings_left([3,7,8,3,6,1])
-# => 3
+# => 3
+
+see_buildings_left([1,1,2,2,2,2,6,3,1,10])
+=> 4
diff --git a/see_buildings_left.rb b/see_buildings_left.rb
@@ -0,0 +1,20 @@
+# Given a list of integers representing the heights of buildings,
+# return the maximum number of buildings that can be seen when
+# looking from the left. A building can see another building if
+# it is taller than all the buildings to its left. The height of
+# the tallest building is included in the count.
+def see_buildings_left(buildings)
+  buildings.each_cons(2).inject(1) do |count, (a, b)|
+    return count if a > b
+    count += 1
+  end
+end
+
+see_buildings_left([1,2,3,4,5])
+# => 5
+
+see_buildings_left([5,4,3,2,1])
+# => 1
+
+see_buildings_left([3,7,8,3,6,1])
+# => 3