[Add] if, lists, map, map with pattern matching examples

Author: kmlroot

if.exs

@@ -0,0 +1 @@
+IO.puts if false, do: :this, else: :that

lists.exs

@@ -0,0 +1,5 @@
+list = [{:first_name, "Mauricio"}, {:last_name, "Serna"}]
+
+list2 = [first_name: "Mauricio", last_name: "Serna"]
+
+IO.puts list === list2

map.exs

@@ -0,0 +1,4 @@
+map = %{:first_name => "Mauricio", :last_name => "Serna"}
+
+IO.puts map[:first_name]
+IO.puts map[:last_name]

map_with_pattern_matching.exs

@@ -0,0 +1,5 @@
+%{} = %{:a => 1, 2 => :b}
+
+%{:a => a} = %{:a => 1, 2 => :b}
+
+IO.puts a