From cb954c474c2c20fcc528ed7538986cd00d9f17a0 Mon Sep 17 00:00:00 2001
From: g4ld <ana.parada@nordstrom.com>
Date: Sat, 12 Jun 2021 21:06:55 -0700
Subject: [PATCH 1/3] added add method

---
 lib/min_heap.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/min_heap.rb b/lib/min_heap.rb
index 6eaa630..171fbc5 100644
--- a/lib/min_heap.rb
+++ b/lib/min_heap.rb
@@ -17,7 +17,8 @@ def initialize
   # Time Complexity: ?
   # Space Complexity: ?
   def add(key, value = key)
-    raise NotImplementedError, "Method not implemented yet..."
+    @store << HeapNode.new(key, value)
+    return heap_up(@store.length - 1)
   end
 
   # This method removes and returns an element from the heap

From 47649252538108b608285a8d48f4c54616e5309d Mon Sep 17 00:00:00 2001
From: g4ld <ana.parada@nordstrom.com>
Date: Sat, 12 Jun 2021 21:13:42 -0700
Subject: [PATCH 2/3] implemented heap_sort and min_heap files

---
 lib/heap_sort.rb | 13 ++++++++++++-
 lib/min_heap.rb  | 17 ++++++++++++++---
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/lib/heap_sort.rb b/lib/heap_sort.rb
index c8a32a4..596e3ef 100644
--- a/lib/heap_sort.rb
+++ b/lib/heap_sort.rb
@@ -4,5 +4,16 @@
 # Time Complexity:  ?
 # Space Complexity: ?
 def heap_sort(list)
-  raise NotImplementedError, "Method not implemented yet..."
+  heap = MinHeap.new
+
+  list.each do |i|
+    heap.add(i)
+  end
+
+  sorted_array = []
+  
+  until heap.empty?
+    sorted_array << heap.remove
+  end
+    return sorted_array
 end
\ No newline at end of file
diff --git a/lib/min_heap.rb b/lib/min_heap.rb
index 171fbc5..b58c672 100644
--- a/lib/min_heap.rb
+++ b/lib/min_heap.rb
@@ -26,7 +26,13 @@ def add(key, value = key)
   # Time Complexity: ?
   # Space Complexity: ?
   def remove()
-    raise NotImplementedError, "Method not implemented yet..."
+    return nil if @store.empty?
+
+    swap(0, @store.length - 1)
+    removed = @store.pop
+
+    heap_down(0) if !@store.empty?
+    return removed.value
   end
 
 
@@ -48,7 +54,7 @@ def to_s
   # Time complexity: ?
   # Space complexity: ?
   def empty?
-    raise NotImplementedError, "Method not implemented yet..."
+    return @store.length == 0
   end
 
   private
@@ -59,7 +65,12 @@ def empty?
   # Time complexity: ?
   # Space complexity: ?
   def heap_up(index)
-    
+    return nil if index == 0
+    parent = (index -1 ) / 2
+    if @store[index].key < @store[parent].key
+      swap(index, parent)
+      heap_up(parent)
+    end
   end
 
   # This helper method takes an index and 

From 9c9aa316fe681107814052d6ce36bb4ecce34c56 Mon Sep 17 00:00:00 2001
From: Ana <anakp07@gmail. omgit config --global user.email anakp07@gmail.com>
Date: Sat, 12 Jun 2021 21:34:48 -0700
Subject: [PATCH 3/3] tests passing

---
 lib/min_heap.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/min_heap.rb b/lib/min_heap.rb
index b58c672..7624f38 100644
--- a/lib/min_heap.rb
+++ b/lib/min_heap.rb
@@ -28,10 +28,12 @@ def add(key, value = key)
   def remove()
     return nil if @store.empty?
 
+    
+    removed = @store[0]
     swap(0, @store.length - 1)
-    removed = @store.pop
+    @store = @store[0...-1]
 
-    heap_down(0) if !@store.empty?
+    heap_down(0)
     return removed.value
   end