From 80c24c8352bc835a4b84c7ee5c3618f0be72e051 Mon Sep 17 00:00:00 2001
From: Stephanie <stephaniejmars@gmail.com>
Date: Sat, 28 Mar 2020 18:51:20 -0700
Subject: [PATCH 1/3] submission

---
 lib/array_intersection.rb           |  2 +-
 lib/palindrome_permutation.rb       | 13 +++++++++++--
 lib/permutations.rb                 | 12 +++++++++++-
 test/palindrome_permutation_test.rb |  2 +-
 test/permutations_test.rb           |  4 ++--
 5 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/lib/array_intersection.rb b/lib/array_intersection.rb
index ac8771f..ad17186 100644
--- a/lib/array_intersection.rb
+++ b/lib/array_intersection.rb
@@ -1,3 +1,3 @@
 def intersection(list1, list2)
-  raise NotImplementedError, "Intersection not implemented"
+  intersect = list1 & list2
 end
\ No newline at end of file
diff --git a/lib/palindrome_permutation.rb b/lib/palindrome_permutation.rb
index f113692..f436c04 100644
--- a/lib/palindrome_permutation.rb
+++ b/lib/palindrome_permutation.rb
@@ -1,4 +1,13 @@
 
 def palindrome_permutation?(string)
-  raise NotImplementedError, "palindrome_permutation? not implemented"
-end
\ No newline at end of file
+  singles = []
+  string.chars.each do |char|
+    if string.count(char).odd?
+      singles << char
+      string.slice!(char)
+    end 
+  end
+
+  return false if singles.length > 1
+  return true
+end
diff --git a/lib/permutations.rb b/lib/permutations.rb
index 3b08381..4d696ee 100644
--- a/lib/permutations.rb
+++ b/lib/permutations.rb
@@ -1,4 +1,14 @@
 
 def permutations?(string1, string2)
-  raise NotImplementedError, "permutations? not implemented"
+  return false if string1.length != string2.length
+
+  string1.chars.each do |char|
+    if string2.include?(char)
+      string1.slice!(char)
+      string2.slice!(char)
+    end
+  end
+  
+  return true if string1.empty? && string2.empty?
+  return false  
 end
\ No newline at end of file
diff --git a/test/palindrome_permutation_test.rb b/test/palindrome_permutation_test.rb
index e9119de..984b333 100644
--- a/test/palindrome_permutation_test.rb
+++ b/test/palindrome_permutation_test.rb
@@ -1,6 +1,6 @@
 require_relative "test_helper"
 
-xdescribe "palindrome_permutation?" do
+describe "palindrome_permutation?" do
   it "will work for hello" do
     expect(palindrome_permutation?("hello")).must_equal false
   end
diff --git a/test/permutations_test.rb b/test/permutations_test.rb
index 79da2f6..28c50ca 100644
--- a/test/permutations_test.rb
+++ b/test/permutations_test.rb
@@ -1,6 +1,6 @@
 require_relative "test_helper"
 
-xdescribe "permutations?" do
+describe "permutations?" do
   it "returns true for empty string" do
     expect(permutations?("", "")).must_equal true
   end
@@ -13,7 +13,7 @@
     expect(permutations?("pasta", "atsap")).must_equal true
   end
 
-  it "returns true for 'pizza', 'pizza'" do
+  it "returns false for 'pizza', 'pasta'" do
     expect(permutations?("pizza", "pasta")).must_equal false
   end
 

From 1abdab867c15cd330d00a3096038a823889db69b Mon Sep 17 00:00:00 2001
From: Stephanie <stephaniejmars@gmail.com>
Date: Sat, 28 Mar 2020 23:36:30 -0700
Subject: [PATCH 2/3] refactored palindrome_permutation to use hash

---
 lib/palindrome_permutation.rb | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/lib/palindrome_permutation.rb b/lib/palindrome_permutation.rb
index f436c04..2de904e 100644
--- a/lib/palindrome_permutation.rb
+++ b/lib/palindrome_permutation.rb
@@ -1,13 +1,19 @@
 
 def palindrome_permutation?(string)
-  singles = []
-  string.chars.each do |char|
-    if string.count(char).odd?
-      singles << char
-      string.slice!(char)
-    end 
+  
+  letter_hash = {}
+  string.chars.map do |char|
+    letter_hash["#{char}"] = string.count(char)
   end
+  
+  odd_count = 0
+  letter_hash.each do |key, value|
+    if value.odd?
+      odd_count += 1
+    end
+  end
+  
+  odd_count > 1 ? (return false) : (return true) 
 
-  return false if singles.length > 1
-  return true
 end
+

From f8e8f7c4056befbd700ee67fdcd46d7fe1522985 Mon Sep 17 00:00:00 2001
From: Stephanie <stephaniejmars@gmail.com>
Date: Sat, 28 Mar 2020 23:39:59 -0700
Subject: [PATCH 3/3] refactored to use ternary

---
 lib/palindrome_permutation.rb | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/palindrome_permutation.rb b/lib/palindrome_permutation.rb
index 2de904e..102c245 100644
--- a/lib/palindrome_permutation.rb
+++ b/lib/palindrome_permutation.rb
@@ -8,9 +8,7 @@ def palindrome_permutation?(string)
   
   odd_count = 0
   letter_hash.each do |key, value|
-    if value.odd?
-      odd_count += 1
-    end
+    value.odd? ? (odd_count += 1) : next
   end
   
   odd_count > 1 ? (return false) : (return true)