title: Strange behavior of rem in Elixir?
body: <p>I tried these two lines of simple Enum.drop_while ... seems easy enough but I don't understand why they turn up differently:</p>
  
  <p><code>
  iex(6)&gt; 1..100 |&gt; Enum.drop_while(fn(x) -&gt; rem(x,10) == 0 end)
  [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
   23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
   43, 44, 45, 46, 47, 48, 49, 50, ...]
  iex(7)&gt; 1..100 |&gt; Enum.drop_while(fn(x) -&gt; rem(10,x) == 0 end)
  [3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
   24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43,
   44, 45, 46, 47, 48, 49, 50, 51, 52, ...]
  </code></p>
  
  <p>Appreciate some help.</p>