Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.php > #5442
| From | Jerry Stuckle <jstucklex@attglobal.net> |
|---|---|
| Newsgroups | comp.lang.php |
| Subject | Re: out of sheer curiosity... |
| Date | 2012-04-10 17:20 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <jm287o$686$1@dont-email.me> (permalink) |
| References | (22 earlier) <9ui7u7FkvdU1@mid.uni-berlin.de> <jm178k$l6m$1@dont-email.me> <timstreater-BE3CEA.16042110042012@news.individual.net> <jm1m10$e7i$2@dont-email.me> <jm1mhc$iho$2@news.albasani.net> |
On 4/10/2012 12:18 PM, Thomas Mlynarczyk wrote: > Jerry Stuckle schrieb: > >> Yes, but the parent is also an object, and the system should call the >> constructor for you. Otherwise you may have an uninitialized parent. > > No. When you instantiate the child, then the child is an object, but > there is no instance of a "parent object". > > Greetings, > Thomas > Although not a separate entity, the parent is still considered an object. You can, for instance, call public methods which are defined in the parent but not the child. Those methods will operate on the parent, just as if you had a parent object. So basically what you have is "dual identity" - the object is considered both a parent and a child, depending on the context. And the parent's constructor is responsible for constructing the parent object; the child is only responsible for constructing the child object. This is actually quite important. This allows you to change the implementation (code and private variables) of the parent object without affecting any child objects. Remember that the child object always has a parent object; the opposite is not necessarily true, and the parent object should not depend on anything in the child (abstract classes are a special case - but even then the parent should never depend on anything in the child). -- ================== Remove the "x" from my email address Jerry Stuckle JDS Computer Training Corp. jstucklex@attglobal.net ==================
Back to comp.lang.php | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
out of sheer curiosity... "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-03-27 12:31 -0430
Re: out of sheer curiosity... "Álvaro G. Vicario" <alvaro.NOSPAMTHANX@demogracia.com.invalid> - 2012-03-27 19:06 +0200
Re: out of sheer curiosity... "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-03-27 13:04 -0430
Re: out of sheer curiosity... Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-03-28 21:12 +0200
Re: out of sheer curiosity... "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-03-28 20:23 -0430
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-03-29 10:00 +0200
Re: out of sheer curiosity... "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-03-29 05:23 -0430
Re: out of sheer curiosity... The Natural Philosopher <tnp@invalid.invalid> - 2012-03-29 11:46 +0100
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-03-29 14:02 +0200
Re: out of sheer curiosity... Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-03-29 14:33 +0200
Re: out of sheer curiosity... The Natural Philosopher <tnp@invalid.invalid> - 2012-03-29 14:37 +0100
Re: out of sheer curiosity... Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-03-29 15:59 +0200
Re: out of sheer curiosity... The Natural Philosopher <tnp@invalid.invalid> - 2012-03-29 17:58 +0100
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-29 09:39 -0400
Re: out of sheer curiosity... Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-03-29 16:21 +0200
Re: out of sheer curiosity... The Natural Philosopher <tnp@invalid.invalid> - 2012-03-29 18:09 +0100
Re: out of sheer curiosity... Tim Streater <timstreater@greenbee.net> - 2012-03-29 22:07 +0100
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-03-29 23:43 +0200
Re: out of sheer curiosity... The Natural Philosopher <tnp@invalid.invalid> - 2012-03-30 04:52 +0100
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-29 16:11 -0400
Re: out of sheer curiosity... Tim Streater <timstreater@greenbee.net> - 2012-03-29 22:01 +0100
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-29 19:29 -0400
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-08 22:50 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-08 17:15 -0400
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-09 00:39 +0200
Re: out of sheer curiosity... The Natural Philosopher <tnp@invalid.invalid> - 2012-04-09 00:59 +0100
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-08 20:28 -0400
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-08 20:24 -0400
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-09 11:29 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-09 08:27 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-09 15:20 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-09 12:03 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-09 20:04 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-09 14:37 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-09 22:50 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-09 20:17 -0400
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-10 10:05 +0200
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 13:28 +0200
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-10 18:54 +0200
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 20:10 +0200
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-10 20:23 +0200
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 23:17 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 17:11 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 23:30 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 19:43 -0400
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 17:08 -0400
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-11 10:40 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 07:58 -0400
Re: out of sheer curiosity... Tim Streater <timstreater@greenbee.net> - 2012-04-10 16:04 +0100
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 12:10 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 18:18 +0200
Re: out of sheer curiosity... The Natural Philosopher <tnp@invalid.invalid> - 2012-04-10 18:20 +0100
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-10 19:31 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 17:20 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 23:57 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 19:50 -0400
Re: out of sheer curiosity... Tim Streater <timstreater@greenbee.net> - 2012-04-10 17:41 +0100
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 17:25 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 12:16 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 13:44 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 08:04 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 17:37 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 12:19 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 18:44 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 17:23 -0400
Re: out of sheer curiosity... Scott Johnson <noonehome@chalupasworld.com> - 2012-04-09 11:50 -0700
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-09 23:03 +0200
Re: out of sheer curiosity... Scott Johnson <noonehome@chalupasworld.com> - 2012-04-09 15:27 -0700
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-09 20:25 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 12:48 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 08:06 -0400
Re: out of sheer curiosity... "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-04-10 07:52 -0430
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 12:20 -0400
Re: out of sheer curiosity... "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-04-10 12:03 -0430
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 17:28 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-11 00:13 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 19:53 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-11 22:17 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-11 16:30 -0400
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-09 20:22 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 12:43 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 08:11 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 18:15 +0200
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-10 19:09 +0200
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 20:17 +0200
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-10 20:25 +0200
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-10 23:21 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 17:34 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-11 01:00 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-10 19:54 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-11 22:10 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-11 16:31 -0400
Re: out of sheer curiosity... Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-04-11 22:40 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-12 00:02 -0400
Re: out of sheer curiosity... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-12 12:00 +0200
Re: out of sheer curiosity... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-12 07:45 -0400
csiph-web