convert string into integer

StringToInteger/stringToInteger.exs

@@ -0,0 +1,22 @@
+# Solution for: https://leetcode.com/problems/string-to-integer-atoi/description/
+defmodule Solution do
+  @spec my_atoi(s :: String.t) :: integer
+  def my_atoi(s) do
+    s |> String.trim |> Integer.parse |> get_result
+  end
+
+  defp get_result({num, str}) do
+    if abs(num) >= 2147483648 do
+        if num > 0 do
+            2147483647
+        else
+            -2147483648
+        end
+    else
+        num
+    end
+  end
+
+  defp get_result(:error), do: 0
+
+end