September 2017 Update

Task/Queue-Usage/Elixir/queue-usage-1.elixir

@@ -0,0 +1,10 @@
+defmodule Queue do
+  def empty?([]), do: true
+  def empty?(_), do: false
+
+  def pop([h|t]), do: {h,t}
+
+  def push(q,t), do: q ++ [t]
+
+  def front([h|_]), do: h
+end

Task/Queue-Usage/Elixir/queue-usage-2.elixir

@@ -0,0 +1,14 @@
+iex(2)> q = [1,2,3,4,5]
+[1, 2, 3, 4, 5]
+iex(3)> Queue.push(q,10)
+[1, 2, 3, 4, 5, 10]
+iex(4)> front=Queue.front(q)
+1
+iex(5)> Queue.empty?(q)
+false
+iex(6)> Queue.pop(q)
+{1, [2, 3, 4, 5]}
+iex(7)> l=[]
+[]
+iex(8)> Queue.empty?(l)
+true