/* * call-seq: * dvector.tan! -> dvector * * Replace each entry x of _dvector_ with tan(x). * * a = Dvector[ 1.1, -2.2, 5.3 ] * a.tan! -> Dvector[ tan(1.1), tan(-2.2), tan(5.3) ] * a -> Dvector[ tan(1.1), tan(-2.2), tan(5.3) ] */ VALUE dvector_tan_bang(VALUE ary) {