lab 04

labs/04/lab4b.ex

@@ -0,0 +1,8 @@
+defmodule Lab4b do
+  for line <- String.split(File.read!("atomic-weights.txt"), "\n", trim: true) do
+    [_number, symbol, _name, weight] = String.split(line)
+    def atomic_weight(unquote(symbol)), do: unquote(String.to_float(weight))
+  end
+
+  def atomic_weight(_symbol), do: -1
+end