Re: out of sheer curiosity...

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From	"M. Strobel" <sorry_no_mail_here@nowhere.dee>
Newsgroups	comp.lang.php
Subject	Re: out of sheer curiosity...
Date	Tue, 10 Apr 2012 10:05:26 +0200
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Am 10.04.2012 02:17, schrieb Jerry Stuckle:
> On 4/9/2012 4:50 PM, Thomas Mlynarczyk wrote:
> 
>> And this initialization is not needed (or might even prove harmful) when
>> the object is copied rather than created from scratch, because in that
>> case the initialization was already done on the original object and the
>> copy was thus created from an already initialized object and it will
>> "inherit" the initialized state. Instead, there are __clone() and
>> __wakeup() which replace __construct() and can do different
>> initialization tasks depending on how the object was created.
>>
> 
> Initialization is NEVER harmful if it is done properly.  That's the whole purpose of
> initialization!.  wakeup() is NOT a constructor - any more than sleep() is a destructor.

'if done properly' fits everywhere and is just too true to be useful.

In PHP the constructor is called on an object without state (data). So you would
normally in the constructor just write out our data, like setting a counter to zero
or a date to the current time. This would be harmful to do on a 'not new' object.

Now PDO comes in. When getting a query result as object your constructor is called
*after* the properties are set.

I found it quite annoying to have an exception from the rule. But thinking more about
it I found out they had a choice of either calling __construct() after setting the
data, or to define another magic method like __pdoconstruct() to give the programmer
a chance to adapt the init process to the data.

Bottom line is: you just have to know your programming language very well, and test
everything thoroughly. Knowledge of OO principles help a lot, but are often too
general to be operational (like for example the "Open Close Principle").

/Str.

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

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