shinokada · May 19, 2014 13:12
diff --git a/array_mode.rb b/array_mode.rb
 arr = [1, 1, 1, 2, 3]
 freq = arr.inject(Hash.new(0)) { |h,v| h[v] += 1; h }
 #=> {1=>3, 2=>1, 3=>1}
 arr.max_by { |v| freq[v] }
 #=> 1
	arr = [1, 1, 1, 2, 3]
	freq = arr.inject(Hash.new(0)) { \|h,v\| h[v] += 1; h }
	#=> {1=>3, 2=>1, 3=>1}
	arr.max_by { \|v\| freq[v] }
	#=> 1