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Re: value returned instead change the value of the variable

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Il 16/10/20 17:11, Jerry Stuckle ha scritto:
> On 10/16/2020 7:23 AM, alex wrote:
>> // DESIGN 1
>> echo "It doesn't work (return 1 vs array), but I like 'DESIGN 1' ";
>> $arr = [1, 2];
>> print_r(
>>      array_shift($arr)
>> );
>>
>> // DESIGN 2
>> echo "It works, but I don't like 'DESIGN 2': ";
>> $arr = [1, 2];
>> array_shift($arr);
>> print_r(
>>      $arr
>> );
>>
>> Output:
>>
>> It doesn't work (return 1 vs array), but I like 'DESIGN 1': 1
>>
>> It works, but I don't like 'DESIGN 2': Array
>> (
>>      [0] => 2
>> )
>>
>> To find a compromise I created this class:
>>
>> <?php
>> class FirstProcessedArgumentReturn {
>>      static function __callStatic(string $name, array $arguments) {
>>          $name($arguments);
>>
>>          return $arguments[0];
>>      }
>> }
>>
>> FirstProcessedArgumentReturn::array_shift([1, 2]);
>> //TODO: Test the method FirstProcessedArgumentReturn::array_push(...);
>> //TODO: Test the method FirstProcessedArgumentReturn::array_pop(...);
>> //TODO: Test the method ...
>>
>> PHP Notice:  Undefined offset: 0 in /tmp/test.php on line 6
>>
>> But as you can see, something does not work: the reason I leave you to 
>> imagine.
>>
>> Some idea?
> 
> It's working fine - but you're doing two different things. array_shift() 
> shifts the array elements one position left - AND RETURNS THE SHIFTED 
> VALUE.  So your first design is working properly.
> 
> In your second design you are discarding the returned value and printing 
> the array.  So it, also, is working fine.
> 
> Your static function is failing because you're not passing an array. You 
> are passing the returned value from array_shift().
> 

final class FirstProcessedArgumentReturn {
     static function __callStatic(string $name, array $arguments) {
         $name($arguments[0]);

         return $arguments[0];
     }
}

// OK
print_r(
     FirstProcessedArgumentReturn::array_shift(
         [1, 2]
     )
);

// MISSING 3
print_r(
     FirstProcessedArgumentReturn::array_push(
         [1, 2],
         3
     )
);

Output:

Array
(
     [0] => 2
)
Array
(
     [0] => 1
     [1] => 2
)

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value returned instead change the value of the variable alex <1j9448a02@lnx159sneakemail.com.invalid> - 2020-10-16 13:23 +0200
  Re: value returned instead change the value of the variable Jerry Stuckle <jstucklex@attglobal.net> - 2020-10-16 11:11 -0400
    Re: value returned instead change the value of the variable alex <1j9448a02@lnx159sneakemail.com.invalid> - 2020-10-16 18:36 +0200
  Re: value returned instead change the value of the variable "J.O. Aho" <user@example.net> - 2020-10-16 20:51 +0200
    Re: value returned instead change the value of the variable alex <1j9448a02@lnx159sneakemail.com.invalid> - 2020-10-17 09:26 +0200
      Re: value returned instead change the value of the variable "J.O. Aho" <user@example.net> - 2020-10-17 10:16 +0200

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