function ary(func, n, guard) {
      n = guard ? undefined : n;
      n = (func && n == null) ? func.length : n;
      return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
    }
Creates a function that invokes `func`, with up to `n` arguments,
ignoring any additional arguments.

@static
@memberOf _
@since 3.0.0
@category Function
@param {Function} func The function to cap arguments for.
@param {number} [n=func.length] The arity cap.
@param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
@returns {Function} Returns the new capped function.
@example

_.map(['6', '8', '10'], _.ary(parseInt, 1));
// => [6, 8, 10]