Although a notice, recognizance, or process has been given, taken, or issued before January 1, 1956, it may, nevertheless, be taken or returnable to a day after such date, in like manner as if this code had been in effect before the notice, recognizance, or process was given, taken or issued. Nothing in this code shall operate to discontinue any cause or matter, civil or criminal, which shall be pending and undetermined in any court on December 31, 1955; but every such cause and matter shall be proceeded in, tried and determined in such court.