Re: [PHP] control structure question

2002-07-25 Thread Miguel Cruz 

On Tue, 23 Jul 2002, Javier Montserat wrote:
 So refering back, i re-wrote the original example using the switch syntax...
 
 switch (true) {
 case doStep1():
 case doStep2():
 case doStep3():
   error();
   break;
 default:
   valid();
 }
 
 Each case expressions is evaluated, until one of them evaluates to a value 
 equal (==) to the switch expression (in this case a boolean error flag).
 
 The error() code will only be called if one of the doStep() evaluates to 
 false.
 
 And the valid() code will only be evaluated if the switch reached the 
 default, which means that none of the above check returned false
 
 I think for this example the switch syntax is more elegant than using a 
 series of if() statements.

That's pretty clever!

miguel


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[PHP] control structure question

2002-07-23 Thread Javier Montserat 

is there a more programmatically elegant way of saying...

$isError = ;

function main() {

doStep1();

if (!$isError) {
doStep2();
}

if (!$isError) {
doStep3();
}
// etc. etc.
}

function doStep1() {
if ($something) {
$isError = 1;
}
}

function doStep2() {
if ($something) {
$isError = 1;
}
}

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Re: [PHP] control structure question

2002-07-23 Thread Martin Clifford 

For steps and sequences, I always use switches.  Most commonly associated with the 
action variable, it would look like this:

switch($action) {
   default:
  // what to show if no variable exists, or is set to a value
  // that is not acceptable below
   break;
   case add_file:
  // what to do in the even that a file needs to be added
  // to the database.
   break;
   case remove_file:
  // what to do in the even that a file need sto be removed
  // from the database.
   break;
}

Basically, whatever the value of $action, that is what section of code will execute.  
Hope that helps!

Martin Clifford
Homepage: http://www.completesource.net
Developer's Forums: http://www.completesource.net/forums/


 Javier Montserat [EMAIL PROTECTED] 07/23/02 10:03AM 
is there a more programmatically elegant way of saying...

$isError = ;

function main() {

doStep1();

if (!$isError) {
doStep2();
}

if (!$isError) {
doStep3();
}
// etc. etc.
}

function doStep1() {
if ($something) {
$isError = 1;
}
}

function doStep2() {
if ($something) {
$isError = 1;
}
}

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Re: [PHP] control structure question

2002-07-23 Thread Javier Montserat 

So refering back, i re-wrote the original example using the switch syntax...

switch (true) {
case doStep1():
case doStep2():
case doStep3():
  error();
  break;
default:
  valid();
}

Each case expressions is evaluated, until one of them evaluates to a value 
equal (==) to the switch expression (in this case a boolean error flag).

The error() code will only be called if one of the doStep() evaluates to 
false.

And the valid() code will only be evaluated if the switch reached the 
default, which means that none of the above check returned false

I think for this example the switch syntax is more elegant than using a 
series of if() statements.

Thanks,
Javier

For steps and sequences, I always use switches.  Most commonly associated 
with the action variable, it would look like this:

switch($action) {
default:
   // what to show if no variable exists, or is set to a value
   // that is not acceptable below
break;
case add_file:
   // what to do in the even that a file needs to be added
   // to the database.
break;
case remove_file:
   // what to do in the even that a file need sto be removed
   // from the database.
break;
}

Basically, whatever the value of $action, that is what section of code will 
execute.  Hope that helps!

Martin Clifford
Homepage: http://www.completesource.net
Developer's Forums: http://www.completesource.net/forums/


  Javier Montserat [EMAIL PROTECTED] 07/23/02 10:03AM 
is there a more programmatically elegant way of saying...

$isError = ;

function main() {

 doStep1();

 if (!$isError) {
 doStep2();
 }

 if (!$isError) {
 doStep3();
 }
 // etc. etc.
}

function doStep1() {
 if ($something) {
 $isError = 1;
 }
}

function doStep2() {
 if ($something) {
 $isError = 1;
 }
}

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