Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] QtRuby check boxes group boxes overview of radio buttons text fields TimerClock widgets windowed application example quadrant method quantifiers, regex asterisks (*) Oniguruma query method, PostgreSQL question marks (?) ?< notation, regex identifiers queues 2nd quick installations (Ruby) quotes ("), strings |