Re: [PHP] operators as callbacks?
On Sat, Nov 29, 2008 at 2:42 PM, Joe <[EMAIL PROTECTED]> wrote:
> Is it possible to use a PHP operator as a callback?
not that im aware of, even if you use the operator overloading extension, im
not sure youll find that ability.
I can use the BC library's math functions instead:
> array_map('bcadd', $array1, $array2)
> but that is an ugly hack that might break if the library is not available.
i dont know how bad that is really, i guess it depends on the distribution
scope of the application. if its in a controlled environment, id just say
install bcmath and forget it.
I can create an anonymous function:
> array_map(create_function('$a, $b', 'return $a + $b;'), $array1, $array2)
> but that seems really unnecessarily verbose.
well, youll just have to wait for 5.3 and its new lambda notation, youll be
able to do this (something close anyway :)),
array_map(function($a, $b) { return $a + $b; }, $array1, $array2);
it doesnt look like much difference here, but create_function() gets a lot
worse w/ functions any less trivial than adding 2 numbers.
Is there any simple clean way to do it? Thanks,
i think youre beating your head against the wall for no good reason. your
solutions are fine, just pick one and roll w/ it ;)
-nathan
[PHP] operators as callbacks?
Is it possible to use a PHP operator as a callback? Suppose I want to add two
arrays elementwise, I want to be able to do something like this:
array_map('+', $array1, $array2)
but this doesn't work as "+" is an operator and not a function.
I can use the BC library's math functions instead:
array_map('bcadd', $array1, $array2)
but that is an ugly hack that might break if the library is not available.
I can create an anonymous function:
array_map(create_function('$a, $b', 'return $a + $b;'), $array1, $array2)
but that seems really unnecessarily verbose.
Is there any simple clean way to do it? Thanks,
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Re: [PHP] operators
$xml->Result[$i] - a method call for object $xml $key=>$value - array notation Henry Krinkle wrote: I have some experience with PHP, but not with these operators: -> => Can someone explain how they are working in this snippet from Yahoo's search API foreach($xml->Result[$i] as $key=>$value) I don't see anything about them in the "Array Operators" documentation.. Thanks - Yahoo! for Good - Make a difference this year. -- life is a game... so have fun. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] operators
I have some experience with PHP, but not with these operators: -> => Can someone explain how they are working in this snippet from Yahoo's search API foreach($xml->Result[$i] as $key=>$value) I don't see anything about them in the "Array Operators" documentation.. Thanks - Yahoo! for Good - Make a difference this year.
RE: [PHP] Operators
> If != is the opposite of == > What is the opposite of === ?? I believe that is !== Kirk -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP] Operators
If != is the opposite of == What is the opposite of === ?? Thanks... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
