how to filter an array?

[shedokan]

I have this array:

<?php
$array=array(array(1,2,3,4),array(1,2,4,3),array(6,2,4,4),array(6,4,2,4),array(6,5,4,1),array(6,4,1,5)
);
?>

is there a way to filter so there won't be arrays that are almost the same like:

1,2,3,4 is equal to 1,2,4,3

6,2,4,4 is equal to 6,4,2,4

6,5,4,1 is equal to 6,4,1,5

 

please, thanks.

 

[BlueSkyIS]

this may not be perfect:

 

$array=array(array(1,2,3,4),array(1,2,4,3),array(6,2,4,4),array(6,4,2,4),array(6,5,4,1),array(6,4,1,5));

for ($i=0;$i<count($array);$i++) {
sort($array[$i]);
}

$current_array = "";
$unique_arrays = array();
foreach($array AS $an_array) {
$last_different = FALSE;

if ($current_array === "") {
	$current_array = $an_array;
} else {	
	// Compare an_array with current_array
	for($j=0;$j<count($current_array);$j++) {
		if ($current_array[$j] != $an_array[$j]) {			
			$unique_arrays[] = $current_array;
			$current_array = $an_array;
			$last_different = TRUE;
			break;
		}
	}
}
}

// Don't forget the last an_array
$unique_arrays[] = $an_array;

echo"<P>UNIQUE:</P>";

print_r($unique_arrays);

[Barand]

try

<?php
$array = array(
            array(1,2,3,4),
            array(1,2,4,3),
            array(6,2,4,4),
            array(6,4,2,4),
            array(6,5,4,1),
            array(6,4,1,5)
);

$x = array();
$filtered = array();

foreach ($array as $a)
{
    if (array_intersect($a, $x) != $a)
    $filtered[] = $a;
    $x = $a;
}

// result
echo '<pre>', print_r($filtered, true), '</pre>';
?>

[phpSensei]

try

<?php
$array = array(
            array(1,2,3,4),
            array(1,2,4,3),
            array(6,2,4,4),
            array(6,4,2,4),
            array(6,5,4,1),
            array(6,4,1,5)
);

$x = array();
$filtered = array();

foreach ($array as $a)
{
    if (array_intersect($a, $x) != $a)
    $filtered[] = $a;
    $x = $a;
}

// result
echo '<pre>', print_r($filtered, true), '</pre>';
?>

 

I was writing an entire script and this came up. Lol

[Barand]

It does depend on the array being conveniently sequenced. If they are jumbled then would require sorting first eg

<?php
$array = array(
            array(1,2,3,4),
            array(6,5,4,1),
            array(6,2,4,4),
            array(6,4,2,4),
            array(1,2,4,3),
            array(6,4,1,5)
);

foreach ($array as $k=>$a)
{
    sort($a);
    $array[$k] = $a;
}

array_multisort($array);

$x = array();
$filtered = array();

foreach ($array as $a)
{
    if (array_intersect($a, $x) != $a)
    $filtered[] = $a;
    $x = $a;
}

echo '<pre>', print_r($filtered, true), '</pre>';
?>

[shedokan]

is there a way to:

filter: 1,2,4,3 and leave 1,2,3,4

 

but not filter: 6,5,4,1 with 1,4,5,6

 

thanks.

[trq]

Yes there are ways. I would suggest looking at the various array functions and seeing what you come up with. Post your code if you get stuck.

[shedokan]

but I understand those functions like I'm bill gates.

[Barand]

And that will always be the case unless you try.

 

Read the manual, play around with them, experiment. See what they do.

 

Did you think everyone else was born knowing how they all work?

 

If you get really stuck, post back.

[shedokan]

I'll try to weith a different way.

I'll filter groups of 36 seperatly using explode.

if I'll have any problems I will post back.

 

[shedokan]

help please, it doesn't filters all

here's my code:

<?php
$code=<<<END
3+2+4+7
3+1+1+5
3+1+5+1
3+2+7+4
3+4+2+7
END;
$code = explode("
", $code);
$count=count($code);
for($i=0;$i<=$count;$i++)
$code[$i] = explode("+", $code[$i]);
foreach ($code as $k=>$a)

{
    sort($a);
    $code[$k] = $a;
}

for($i=1;$i<=2;$i++){

$x = array();
$filtered = array();

foreach ($code as $a)
{
    if (array_intersect($a, $x) != $a)
    $filtered[] = $a;
    $x = $a;
}
$code=$filtered;
}
$count=count($code)-1;
for($i=0;$i<=$count;$i++){
$d=$code[$i][0];
$c=$code[$i][1];
$b=$code[$i][2];
$a=$code[$i][3];
if($a != '' || $b != '' || $c != '' || $d != '')
	$final .=$a.'+'.$b.'+'.$c.'+'.$d.'='."\n";
}
echo $final;
?>