--- a/1-Ruby/day2.rb	Wed Jan 04 21:01:13 2017 +0000
+++ b/1-Ruby/day2.rb	Sat Jan 07 20:36:03 2017 +0000
@@ -59,3 +59,51 @@
 	my_hash[idx] = val
 end
 puts my_hash.inspect
+
+## Iterating a hash
+puts "Each with single parameter gets pairs"
+my_hash.each { |vals| puts "++#{vals[0]} = #{vals[1]}" }
+puts "Each with two parameters gets key and value"
+my_hash.each { |key, val| puts "++#{key} = #{val}" }
+puts "Or you can get just keys and just values"
+my_hash.each_key { |key| puts "++#{key}" }
+my_hash.each_value { |value| puts "++#{value}" }
+
+## Arrays as stacks:
+my_arr = []
+my_arr.push(1)
+my_arr.push(2)
+my_arr.push(3)
+my_arr.push(4)
+puts my_arr.pop()
+puts my_arr.pop()
+puts my_arr.pop()
+puts my_arr.pop()
+## Arrays as queues
+my_arr.push(7)
+my_arr.push(8)
+my_arr.push(9)
+my_arr.push(10)
+puts my_arr.shift()
+puts my_arr.shift()
+puts my_arr.shift()
+puts my_arr.shift()
+
+## Iterating in fours
+
+my_arr = Array(1..16)
+# We need a temp place holder - we can't do ugly things with indexes
+temp = []
+my_arr.each do |val|
+	temp.push(val)
+	if temp.size == 4
+		puts "#{temp[0]} #{temp[1]} #{temp[2]} #{temp[3]}"
+		temp = []
+	end
+end
+
+## And with each_slice
+my_arr.each_slice(4) do |val|
+	puts "#{val[0]} #{val[1]} #{val[2]} #{val[3]}"
+end
+