craftninja · May 10, 2014 23:34
diff --git a/hash_default_hash b/hash_default_hash
 data = [1,2,3,2,2,1,4,5,4,3]

 result = data.reduce(Hash.new {|hash, key| hash[key] = []}) do |hash, number|
  hash[number] << number
  hash
 end

 result = {}
 data.each do |number|
  result[number] ||= []
  result[number] << number
 end
 p result
	data = [1,2,3,2,2,1,4,5,4,3]

	result = data.reduce(Hash.new {\|hash, key\| hash[key] = []}) do \|hash, number\|
	hash[number] << number
	hash
	end

	result = {}
	data.each do \|number\|
	result[number] \|\|= []
	result[number] << number
	end
	p result