Re: Doubt regarding an array of references...

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From	"M. Strobel" <sorry_no_mail_here@nowhere.dee>
Newsgroups	comp.lang.php
Subject	Re: Doubt regarding an array of references...
Date	Tue, 03 Apr 2012 14:15:53 +0200
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Am 03.04.2012 14:03, schrieb Jerry Stuckle:
> On 4/3/2012 7:39 AM, M. Strobel wrote:
>>
>> My 2¢:
>>
>> The problem with the counted for-loop is tedious writing, and off-by-one error.
>>
> 
> No error if you remember what you're doing.  They can be tedious, but allow more
> control over the loop.  The real problem here is the indicies must be integers and
> sequential.
> 
> OTOH, foreach() loops process the elements in the order they were added to the array,
> which is not necessarily numeric order, i.e.

Very true, and very apparent when you mix numeric and alphanumeric keys. For me this
is a feature.

> 
>> The problem with the foreach-loop is: don't forget to use the key when you want to
>> change values!
>>
>> This works:
>>
>> #--------------------------------
>> strobel@s114-intel:~>  php -a
>> Interactive shell
>>
>> php>  $a = array(1,2,3);
>> php>  foreach ($a as $k=>$v) { $a[$k]++; }
>> php>  var_dump($a);
>> array(3) {
>>    [0]=>
>>    int(2)
>>    [1]=>
>>    int(3)
>>    [2]=>
>>    int(4)
>> }
--cut--
>>
>> I see references in PHP as "a can of worms", in PHP5 they are only necessary in very
>> special cases.
>>
>> /Str.
>>
> 
> References are very handy - and prevent the need for such gyrations as you're going
> through.
> 
> I find this much easier to understand:
> 
> $a = array(1,2,3);
> foreach ($a as &$v) {
>   $v++;
> }

Yeah, this looks clear to me. Anyway I would advice any beginner to stay away from
references in the first place.

Especially with all this old PHP4 code in the wild you get on the wrong track.

/Str.

Thread

Doubt regarding an array of references... "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-04-02 11:47 -0430
  Re: Doubt regarding an array of references... "Álvaro G. Vicario" <alvaro.NOSPAMTHANX@demogracia.com.invalid> - 2012-04-03 11:02 +0200
    Re: Doubt regarding an array of references... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-03 13:39 +0200
      Re: Doubt regarding an array of references... Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-03 08:03 -0400
        Re: Doubt regarding an array of references... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-03 14:15 +0200
        Re: Doubt regarding an array of references... "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-04 10:48 +0200

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