2016 Update

Task/Write-float-arrays-to-a-text-file/Elixir/write-float-arrays-to-a-text-file.elixir

@@ -0,0 +1,22 @@
+defmodule Write_float_arrays do
+  def task(xs, ys, fname, precision\\[]) do
+    xprecision = Keyword.get(precision, :x, 2)
+    yprecision = Keyword.get(precision, :y, 3)
+    format = "~.#{xprecision}g\t~.#{yprecision}g~n"
+    File.open!(fname, [:write], fn file ->
+      Enum.zip(xs, ys)
+      |> Enum.each(fn {x, y} -> :io.fwrite file, format, [x, y] end)
+    end)
+  end
+end
+
+x = [1.0, 2.0, 3.0, 1.0e11]
+y = for n <- x, do: :math.sqrt(n)
+fname = "filename.txt"
+
+Write_float_arrays.task(x, y, fname)
+IO.puts File.read!(fname)
+
+precision = [x: 3, y: 5]
+Write_float_arrays.task(x, y, fname, precision)
+IO.puts File.read!(fname)