/* * call-seq: * dvector.where_closest(number) -> int or nil * dvector.where_first_closest(number) -> int or nil * * Returns the index of the first entry in _dvector_ with value closest to _number_, <code>nil</code> if * _dvector_ is empty. * * a = Dvector[ 1, 2, -3, 4, -5, 4, 3, -5, 2 ] * a.where_closest(3.9) -> 3 * Dvector[].where_closest(3.9) -> nil */ VALUE dvector_where_closest(VALUE ary, VALUE item) {