[Add] anonymous functions, head and tail, read_file examples

Author: kmlroot

anonymous_function.exs

@@ -0,0 +1,7 @@
+add = fn(a, b) -> a + b end
+
+IO.puts add.(1,2)
+
+double = fn a -> add.(a, a) end
+
+IO.puts double.(2)

case.exs

@@ -0,0 +1,8 @@
+case {1, 2, 3} do
+  {4, 5, 6} ->
+    IO.puts "This clause won't match"
+  {1, x, 3} ->
+    IO.puts "This clause will match and bind x to 2 in this clause"
+  _ ->
+    IO.puts "This clause would match any value"
+end

clauses_guards.exs

@@ -0,0 +1,6 @@
+f = fn
+  x, y when x > 0 -> x + y
+  x, y -> x * y
+end
+
+IO.puts f.(1, 3)

example.txt

@@ -0,0 +1,3 @@
+Mauricio
+Serna
+Florez

head_tail.exs

@@ -0,0 +1,4 @@
+[head | tail] = [1, "Mauricio", "Serna"]
+
+IO.puts head
+IO.puts tail

read_file.exs

@@ -0,0 +1 @@
+File.read("./example.txt")