Number combination calculation

[Readme]

I am trying to find a calculation that will determine the number of two digit combinations that can be derived from twelve numbers, and what those number are. Any thoughts?

 

Example: 68 41 90 100 are the numbers.

 

68  41 

68  90 

68  100 

41  68 

41  90

41  100

90  68

90  41

90  100

100  68

100  41

100  90

 

Thanks!!!

 

[rhodesa]

n * (n-1)

or

(n^2) - n

[Readme]

hm

 

 

[Readme]

im noob

 

I need full code

[rhodesa]

<?php 
  $nums = array(68,41,90,100);
  foreach($nums as $i=>$num1){
    foreach($nums as $j=>$num2){
      if($i == $j) continue;
      print "$num1 $num2";
    }
  }
?>

[Readme]

Good job!! But

 

Result (incorrect): 68 4168 9068 10041 6841 9041 10090 6890 4190 100100 68100 41100 90 

 

correct 100%

68  41 

68  90 

68  100 

41  68 

41  90

41  100

90  68

90  41

90  100

100  68

100  41

100  90

 

 

my English is not very good

[rhodesa]

It is correct, I just didn't put a line break tag in it:

<?php 
  $nums = array(68,41,90,100);
  foreach($nums as $i=>$num1){
    foreach($nums as $j=>$num2){
      if($i == $j) continue;
      print "$num1 $num2<br>";
    }
  }
?>

[Readme]

The last question.

 

How to create a combination of 6 numbers?

 

[rhodesa]

How are you using this? As in, how are you getting the numbers?

[Readme]

Sometimes I use two combinations, sometimes 3 and extremely rarely 6.

[rhodesa]

so something like this?

 

<?php 
  function getCombos ( $arr, $n ,$stack = array(), $combos = array()){
    if(count($stack) < $n){
      foreach(array_keys($arr) as $key){
        if(in_array($key,array_keys($stack))) continue;
        $combos = getCombos($arr,$n,array_merge($stack,array($key=>$arr[$key])),$combos);
      }
    }else
      $combos[] = array_values($stack);
    return $combos;
  }

  $nums = array(68,41,90,100,32,56,78,34,23,53);
  $combos = getCombos($nums,3);
  foreach($combos as $combo)
    print implode(' ',$combo)."<br>";
?>

[Readme]

Yes!!!

 

Thank you very much.

Very good job

[Readme]

How do!

 

When creating a combination of numbers, the number sequence becomes too long, and to avoid this, you need to bring in an exact number (68).

Example:

 

$number = array([68],41,90,100,32,56

[68] is exact number

 

68 41 90 100 32 56

68 41 90 100 56 56

68 41 90 32 32 56

68 41 90 32 56 56

68 41 90 56 32 56

68 41 90 56 56 56

[Readme]

rhodesa ?

[rhodesa]

I didn't see a question, and thought you were informing me of something. What is the question exactly?

[Readme]

$nums = array(68,41,90,100,32,56)

 

That it takes the first number (68) and creates a combination with other numbers; then further number 41 and creates new combination, etcetera. I would need it this way, that by giving it a number, the system would create a combination with other numbers.

 

 

 

My English is not very good

 

[rhodesa]

I think I see what you are asking. Just leave the first number off the front of the array, and add it back when printing:

 

<?php 
  function getCombos ( $arr, $n ,$stack = array(), $combos = array()){
    if(count($stack) < $n){
      foreach(array_keys($arr) as $key){
        if(in_array($key,array_keys($stack))) continue;
        $combos = getCombos($arr,$n,array_merge($stack,array($key=>$arr[$key])),$combos);
      }
    }else
      $combos[] = array_values($stack);
    return $combos;
  }

  $base = 68;
  $nums = array(41,90,100,32,56);
  $combos = getCombos($nums,count($nums));
  foreach($combos as $combo)
    print $base." ".implode(' ',$combo)."<br>";
?>

 

output:

68 41 90 100 32 56
68 41 90 100 56 56
68 41 90 32 32 56
68 41 90 32 56 56
68 41 90 56 32 56
68 41 90 56 56 56
68 41 100 100 32 56
68 41 100 100 56 56
68 41 100 32 32 56
68 41 100 32 56 56
68 41 100 56 32 56
68 41 100 56 56 56
68 41 32 100 32 56
68 41 32 100 56 56
68 41 32 32 32 56
68 41 32 32 56 56
68 41 32 56 32 56
68 41 32 56 56 56
68 41 56 100 32 56
68 41 56 100 56 56
68 41 56 32 32 56
68 41 56 32 56 56
68 41 56 56 32 56
68 41 56 56 56 56
68 90 90 100 32 56
68 90 90 100 56 56
68 90 90 32 32 56
68 90 90 32 56 56
68 90 90 56 32 56
68 90 90 56 56 56
68 90 100 100 32 56
68 90 100 100 56 56
68 90 100 32 32 56
68 90 100 32 56 56
68 90 100 56 32 56
68 90 100 56 56 56
68 90 32 100 32 56
68 90 32 100 56 56
68 90 32 32 32 56
68 90 32 32 56 56
68 90 32 56 32 56
68 90 32 56 56 56
68 90 56 100 32 56
68 90 56 100 56 56
68 90 56 32 32 56
68 90 56 32 56 56
68 90 56 56 32 56
68 90 56 56 56 56
68 100 90 100 32 56
68 100 90 100 56 56
68 100 90 32 32 56
68 100 90 32 56 56
68 100 90 56 32 56
68 100 90 56 56 56
68 100 100 100 32 56
68 100 100 100 56 56
68 100 100 32 32 56
68 100 100 32 56 56
68 100 100 56 32 56
68 100 100 56 56 56
68 100 32 100 32 56
68 100 32 100 56 56
68 100 32 32 32 56
68 100 32 32 56 56
68 100 32 56 32 56
68 100 32 56 56 56
68 100 56 100 32 56
68 100 56 100 56 56
68 100 56 32 32 56
68 100 56 32 56 56
68 100 56 56 32 56
68 100 56 56 56 56
68 32 90 100 32 56
68 32 90 100 56 56
68 32 90 32 32 56
68 32 90 32 56 56
68 32 90 56 32 56
68 32 90 56 56 56
68 32 100 100 32 56
68 32 100 100 56 56
68 32 100 32 32 56
68 32 100 32 56 56
68 32 100 56 32 56
68 32 100 56 56 56
68 32 32 100 32 56
68 32 32 100 56 56
68 32 32 32 32 56
68 32 32 32 56 56
68 32 32 56 32 56
68 32 32 56 56 56
68 32 56 100 32 56
68 32 56 100 56 56
68 32 56 32 32 56
68 32 56 32 56 56
68 32 56 56 32 56
68 32 56 56 56 56
68 56 90 100 32 56
68 56 90 100 56 56
68 56 90 32 32 56
68 56 90 32 56 56
68 56 90 56 32 56
68 56 90 56 56 56
68 56 100 100 32 56
68 56 100 100 56 56
68 56 100 32 32 56
68 56 100 32 56 56
68 56 100 56 32 56
68 56 100 56 56 56
68 56 32 100 32 56
68 56 32 100 56 56
68 56 32 32 32 56
68 56 32 32 56 56
68 56 32 56 32 56
68 56 32 56 56 56
68 56 56 100 32 56
68 56 56 100 56 56
68 56 56 32 32 56
68 56 56 32 56 56
68 56 56 56 32 56
68 56 56 56 56 56

[Readme]

Yes!

 

Thanks man