Page 3 - Array creation [was: Need help]

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#31

January 17th, 2013, 11:27 AM

ManiacDan

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Quote:

If first array contains elements from second array would return true if not false.

This is the first time you've said this. It took 20+ posts for the actual question to come to light. You've been saying "compare the arrays" and "equal" this whole time.

You also said array_diff wouldn't work, which further mislead us, since that's the answer.

PHP Code:


		
			
 $array1 = array();  

$array1[] = array('name' => 'Iphone', 'year' => '2008');  

$array1[] = array('name' => 'Motorola', 'year' => '2006'); 

$array1[] = array('name' => 'Sony', 'year' => '2006'); 

$array1[] = array('name' => 'Nokia', 'year' => '2006'); 



$array2 = array();  

$array2[] = array('name' => 'Iphone', 'year' => '2008');  

$array2[] = array('name' => 'Motorola', 'year' => '2006'); 



if ( count(array_diff($array2, $array1)) == 0 ) {

  echo 'true'; 

} else { 

  echo 'false'; 

}

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#32

January 17th, 2013, 11:28 AM

Aurum84

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With that description of the problem, you would go to an implementation of a Set. And regarding this as a homework assignment, I would not be surprised if that is what your teachers pursue. Look up the specifics of a Set and tell me if you agree.

#33

January 17th, 2013, 11:32 AM

Triple_Nothing

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Ok. Then retrieve a count on each array. Make it run the lesser/equal array as its counter.

Last edited by Triple_Nothing : January 17th, 2013 at 11:41 AM.

#34

January 17th, 2013, 11:42 AM

Dzeno

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Aurum you probably you are right.

ManiacDan solution you have posted will display true even if the elements form array 2 are not contained in array 1

#35

January 17th, 2013, 12:05 PM

ManiacDan

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Ah right, I forgot array_diff doesn't work in multi-dimensional arrays.

Use loops:

PHP Code:


		
			
 $array1 = array();   

$array1[] = array('name' => 'Iphone', 'year' => '2008');   

$array1[] = array('name' => 'Motorola', 'year' => '2006');  

$array1[] = array('name' => 'Sony', 'year' => '2006');  

$array1[] = array('name' => 'Nokia', 'year' => '2006');  



$array2 = array();   

$array2[] = array('name' => 'Iphone', 'year' => '2008');   

$array2[] = array('name' => 'Motorola', 'year' => '2006');  





$equal = true;

foreach ( $array2 as $val ) {

  if ( !in_array($val, $array1 ) ) {

    $equal = false;

    break;

  }

}



if ( $equal ) { 

  echo 'true';  

} else {  

  echo 'false';  

}

-Dan

#36

January 17th, 2013, 12:14 PM

Dzeno

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Thanks you very much. You helped me that is exactly what I was looking for.

Page 3 - PHP-General - Array creation [was: Need help]

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