title: Evaluate vectors or tuples in a function (julia)
body: <p>I want to evaluate a set of vectors (or tuples) in a function $f$ but Julia says me that is imposible.</p>
  <p>For example: If I have an array of tuples <code>p=[(1,1), (1,-1), (-1,1), (-1,-1)]</code> and a function <code>f(x,y)=x+y</code>. I would like to calculate <code>f(p[1]) = f(1,1)= 2</code>. But Julia says me that the types are incompatible.</p>
  <p>Can you help me please?</p>