Every offense of which a court not of record is given jurisdiction under this title may be tried upon a warrant; or the judge of such court may, in his discretion, make an examination into the offense and proceed according to the provisions of Chapter 7 (§ 19.2-71 et seq.) of Title 19.2. The word warrant as used in this chapter shall be construed to include a summons or notice requiring a person to appear and answer a charge of having violated any statute, ordinance, or any regulation having the force and effect of law.