[SOLVED] Check if array contains consecutive numbers

[Thomisback]

Hi,

I'm having a really interesting problem, after searching for some time I decided to post it here.

For example if I have an array like this:

 

//Creates an array with elements.
$theVariable = array("1", "5", "8", "15", "16", "17", "23", "44", "45");

 

How would I change it so there are no more consecutive numbers?

Like this:

 

//Creates an array with elements.
$theVariable = array("1", "5", "8", "16", "23", "44");

 

Suggestions are welcome...

Kind regards

[RussellReal]

I seem to notice in the bottom example yoru script favors 16 over 15 and 44 over 45 is there any specific meaning for this?

[Thomisback]

Oh my bad, No I was just showing that it should leave one of the numbers of the consecutive numbers instead of deleting all of them.

[RussellReal]

what about recurring? like 1 1 1 1

 

and should this be alpha numeric or just numeric?

[Thomisback]

There will never be recurring numbers so no need to worry about that.

All of the values in the array will be numeric.

[RussellReal]

try that, and I just gave a lecture about giving out scripts :'( I'm a hypocrite

 

but this was fun

 

<?php
$array = array(1,3,4,7,8,12,13,14);
foreach ($array as $k => $v) {
	if (isset($prev)) {
		if (($v - $prev) != 1) $newArray[] = $v;
	} else { $newArray[] = $v; }
	$prev = $v;
}
print_r($newArray);
?>

[Thomisback]

Haha thanks

 

I just tried it, the array in your example:

  $array = array(1,3,7,12,13,14); 

 

Should return something like:

 

  $array = array(1,3,4,7,12,14); 

 

But gives me:

Array ( [0] => 1 [1] => 3 [2] => 7 [3] => 12 )

 

Any help?

 

Never mind I think it works Let me try that again XD

[Thomisback]

RussellReal I love you XD Thanks!

[chronister]

Just to play the devil's advocate here....

 

What about an array that was like this....

 

$numbers = array(1, 6, 7, 3, 2, 5, 66, 22, 78);

 

Are you already sorting the array somewhere in your code, or does the array get created in a way that there will *never* be larger numbers before smaller numbers or consecutive numbers that are not next to each other in the array?

 

nate

 

[Thomisback]

The values in the array are sorted from small to big so that shouldn't be a problem