From ddf33000c84ba5e09021ea1cbc05f3636478dcf3 Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Wed, 24 Oct 2018 11:05:34 -0400
Subject: [PATCH] ruby - grade-school

---
 ruby/grade-school/grade_school.rb | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/ruby/grade-school/grade_school.rb b/ruby/grade-school/grade_school.rb
index 3fa46b6..7b4a8b2 100644
--- a/ruby/grade-school/grade_school.rb
+++ b/ruby/grade-school/grade_school.rb
@@ -1,3 +1,4 @@
+# School class
 class School
   def initialize
     @roster = {}
@@ -8,13 +9,11 @@ class School
   end
 
   def add(name, grade)
-    if @roster[grade].nil?
-      @roster[grade] = []
-    end
+    @roster[grade] ||= []
     @roster[grade].push(name).sort!
   end
 
   def students_by_grade
-    @roster.sort.map {|key, value| {grade: key, students: value}}
+    @roster.sort.map { |key, value| { grade: key, students: value } }
   end
 end