[PHP] Boolean-cast and arrays

2007-02-08 Thread Tim 
First thank you all for your input on all-in-one classes.

Reading the php manual on boolean types and casts, and came accros the
following:

quote
When converting to boolean, the following values are considered FALSE:

...

an array with zero elements

...
/quote

So here I am sitting and wondering if after all this while doing:

$arr = array();
If (count($arr) == 0) {}

Shouldn't have been simply doing:

$arr = array();
If (!arr) {}


Is the latter problematic in any programming standards? 
Does it take longer to process? 
Is it using count()?
Is Type-Juggling considered good practise? 

Regards,

Tim

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RE: [PHP] Boolean-cast and arrays

2007-02-08 Thread Tim 
 sorry typo, make that:

 Shouldn't have been simply doing:
 
 $arr = array();
 If (!$arr) {}

 -Message d'origine-
 De : Tim [mailto:[EMAIL PROTECTED] 
 Envoyé : jeudi 8 février 2007 16:49
 À : php-general@lists.php.net
 Objet : [PHP] Boolean-cast and arrays
 
 First thank you all for your input on all-in-one classes.
 
 Reading the php manual on boolean types and casts, and came accros the
 following:
 
 quote
 When converting to boolean, the following values are considered FALSE:
 
 ...
 
 an array with zero elements
 
 ...
 /quote
 
 So here I am sitting and wondering if after all this while doing:
 
 $arr = array();
 If (count($arr) == 0) {}
 
 Shouldn't have been simply doing:
 
 $arr = array();
 If (!arr) {}
 
 
 Is the latter problematic in any programming standards? 
 Does it take longer to process? 
 Is it using count()?
 Is Type-Juggling considered good practise? 
 
 Regards,
 
 Tim
 
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 PHP General Mailing List (http://www.php.net/) To 
 unsubscribe, visit: http://www.php.net/unsub.php
 

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Re: [PHP] Boolean-cast and arrays

2007-02-08 Thread Youri LACAN-BARTLEY 

Tim wrote:

First thank you all for your input on all-in-one classes.

Reading the php manual on boolean types and casts, and came accros the
following:

quote
When converting to boolean, the following values are considered FALSE:

...

an array with zero elements

...
/quote

So here I am sitting and wondering if after all this while doing:

$arr = array();
If (count($arr) == 0) {}

Shouldn't have been simply doing:

$arr = array();
If (!arr) {}


I'm afraid I can't bring in any insight, I just wanted to mention that's 
a nice feature you've brought up. The only issue I can see popping up 
is that !$arr doesn't explicitly indicate that you are checking for an 
empty array ... Other than that, I guess it's yet another way to get of 
a few bytes worth of code.


I'm curious to find out what others have to say.



Is the latter problematic in any programming standards? 
Does it take longer to process? 
Is it using count()?
Is Type-Juggling considered good practise? 


Regards,

Tim



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Re: [PHP] Boolean-cast and arrays

2007-02-08 Thread Robert Cummings 
On Thu, 2007-02-08 at 18:36 +0100, Youri LACAN-BARTLEY wrote:
 Tim wrote:
  First thank you all for your input on all-in-one classes.
  
  Reading the php manual on boolean types and casts, and came accros the
  following:
  
  quote
  When converting to boolean, the following values are considered FALSE:
  
  ...
  
  an array with zero elements
  
  ...
  /quote
  
  So here I am sitting and wondering if after all this while doing:
  
  $arr = array();
  If (count($arr) == 0) {}
  
  Shouldn't have been simply doing:
  
  $arr = array();
  If (!arr) {}
 
 I'm afraid I can't bring in any insight, I just wanted to mention that's 
 a nice feature you've brought up. The only issue I can see popping up 
 is that !$arr doesn't explicitly indicate that you are checking for an 
 empty array ... Other than that, I guess it's yet another way to get of 
 a few bytes worth of code.

It simplifies code and also speeds it up. Instead of incurring the cost
of a function call overhead the time is instead reduced to the
evaluation of an opcode.

Cheers,
Rob.
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