Tie::CountLoop(3) User Contributed Perl Documentation Tie::CountLoop(3) NNAAMMEE Tie::CountLoop - Have a counter looping in a scalar with min max and increment value. SSYYNNOOPPSSIISS use Tie::CountLoop; tie my $counter , 'Tie::CountLoop',15 ,-1 ,15 ,7 ,0; my $t = tied $counter; $t->increment( 1 ); for ( 1 .. 20 ) { print " <<$counter>> <$_> \n"; } ## stop temporary the auto increment behaviour $t->auto( 0 ); for ( 1 .. 20 ) { print " <<$counter>> <$_> \n"; } or ## the default value allow this ## it is the same as my $counter , 'Tie::CountLoop', 0 , 1 , ( 2**32 ) - 1 , 0 , 0; use Tie::CountLoop; tie my $counter , 'Tie::CountLoop'; for ( 1 .. 20 ) { print " <<$counter>> <$_> \n"; } ## How to toggle a binary flag after 5 access to the valriable my $t1 = tie my $counter1 , 'Tie::CountLoop',0,1,1,0,5; for ( 1 .. 20 ) { print " <<$counter1>> <$_> \n"; } DDEESSCCRRIIPPTTIIOONN "Tie::CountLoop" allows you to tie a scalar in such a way that it increments each time it is used. The tie takes 4 optionals extra arguments. Argument 1: is the _s_t_a_r_t value of the counter. (default =0). Argument 2: is the _i_n_c_r_e_m_e_n_t value. (default = 1). Argument 3: is the _m_a_x_i_m_a_l value. When this value is reached, the counter is set to the _m_i_n_i_m_a_l value (default = (2**32) -1) Argument 4: is the _m_i_n_i_m_a_l value. When this value is reached if we used an negative _i_n_c_r_e_m_e_n_t value, the counter is set to the _m_a_x_i_m_a_l _v_a_l_u_e (default = 0) Argument 5: is a _s_k_i_p_p_i_n_g value. If set to 3, means that you could access the counter 3 time without incrementing (default=1) MMEETTHHOODDSS The Tie::CountLoop provide 7 extra methods. aauuttoo which change the autoincrement behaviour. With 1, the counter is incremented when accessed. With 0, the counter is NOT incremented when accessed. ttooggggllee which toggle the autoincrement behaviour (on and off and again). vvaalluuee get/set the value of the counter without incrementing the counter. mmaaxx get/set the maximal value for the counter. mmiinn get/set the minimal value for the counter. iinnccrreemmeenntt get/set the increment value for the counter. sskkiipp get/set the skipping value for the counter. RREEVVIISSIIOONN HHIISSTTOORRYY Revision 1.7 2008/09/25 15:52:27 fabrice add extra methods to access all parameter of the counter clean the code for auto and toggle to allow instantiation by object Revision 1.6 2006/11/14 13:31:56 fabrice fix default value for skip parameter Revision 1.5 2006/02/03 10:42:55 fabrice add README file Revision 1.4 2006/02/03 10:21:37 fabrice correct code for maximal and minimal value after increment Revision 1.3 2006/01/26 19:31:20 fabrice add method 'retrieve' Revision 1.2 2006/01/26 15:53:56 fabrice pod created Revision: 1.1 start project AAUUTTHHOORR This package was written by _D_u_l_a_u_n_o_y _F_a_b_r_i_c_e _<_f_a_b_r_i_c_e_@_d_u_l_a_u_n_o_y_._c_o_m>. CCOOPPYYRRIIGGHHTT aanndd LLIICCEENNSSEE This package is copyright 2006-2008 by _D_u_l_a_u_n_o_y _F_a_b_r_i_c_e _<_f_a_b_r_i_c_e_@_d_u_l_a_u_n_o_y_._c_o_m>. Under the GNU GPL2 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Tie::CountLoop Copyright (C) 2004-2008 DULAUNOY Fabrice Tie::CountLoop comes with ABSOLUTELY NO WARRANTY; for details See: This is free software, and you are welcome to redistribute it under certain conditions; perl v5.10.0 2008-09-25 Tie::CountLoop(3)