The most inventive way to switch 2 values - Page 2

CHASE · 02-28-2008, 12:06 AM

I'm not sure if this follows the rule of 8 lines perfectly, but I did my best, and wasn't sure what a "line" was defined at.

PHP Code:


			
<?php

    $a = 1;
    $b = 2;
    
    $string = "The quick brown fox jumps over the lazy dog.";
    $string = explode(" ", $string);
    
    foreach ( $string as $line )
    {
        if ( $numb == $a )
        {
            $numb = $b;
        }
        else
        {
            $numb = $a;
        }
        
        $array[] = $numb;
    }
    
    $a = $array[1];
    $b = $array[2];
    
    var_dump($a);
    var_dump($b);
    
?>

Wildhoney · 02-28-2008, 01:00 AM

It's a jolly good attempt, Chase! We've had some wonderful additions. Really put my attempt to shame

!

CHASE · 02-28-2008, 04:29 PM

Had to make a fix to my code. It wasn't swapping the two variables, just overwriting them with 1 or 2. Now it's back on track ;)

Seraskier · 03-26-2009, 07:28 PM

codefreek thanked every post....

PHP Code:


			
<?php

$a=1;

$b=2;



$a++;

$b--;

?>

hah, didnt see that one.

Sakakuchi · 04-04-2009, 09:46 AM

Damn, you guys make my head blow.

Here is my try:

PHP Code:


			
$a = 1;
$b = 2;

$a += $b;
$b = $a - $b;
$a -= $b;
echo '$b = ' . $b . '<br />';
echo '$a = ' . $a;

And another one, think its quite smooth

PHP Code:


			


$a = 1;
$b = 2;
if($b = $a && $a = $b)echo '$b = ' . $b .'<br />$a = ' . $a;

Village Idiot · 04-08-2009, 09:47 PM

I haven't done any in a while. This certainly is not inventive, just lower level that need be.
C++

Code:

    int a = 0;
    int b = 1;
    int temp;

    int *addrA = &a;
    int *addrB = &b;
    temp = *addrA;
    a = *addrB;
    b = temp;

What this code does:
Assign 2 ints with the value of zero and one respectively
Assign two pointers to the memory address of each
Manually go into memory and get the values opposed to letting C++ do it.

Mike · 06-25-2009, 12:13 AM

Quote:

Originally Posted by Sakakuchi

Damn, you guys make my head blow.

Here is my try:

PHP Code:


			
$a = 1;
$b = 2;

$a += $b;
$b = $a - $b;
$a -= $b;
echo '$b = ' . $b . '<br />';
echo '$a = ' . $a;

Damn, i like this one, it's awsome, it's simple and works in any language

Wildhoney · 06-25-2009, 01:33 AM

Haha

Einstein does live after all! We've had some utter madness in this thread.

adamdecaf · 06-25-2009, 04:16 AM

Anyone who knows what I'm doing gets a cookie!

PHP Code:


			
<?php
var $a, $b;

$t = pow(2, 10);
    $t = pow(($t * $t), 2);

// First
    for ($n = 0; $n <= $t; $n++) {
       $b = pow(-1, $n);
           $b *= 4;
       $b /= (2 * $n) + 1;
    }

$b %= 2;


// Next
$t /= 2;
    for ($n = 0; $n <= $t; $n++) {
        $a = pow((1+(1/$n)), $n);
    }
    
$a -= $b;
?>

It's not really inventive, just really CPU intensive. FYI please don't run this script.

Another try:

PHP Code:


			
<?php
// Start
   $f = Array();
      $f[0] = 0;
      $f[1] = 1;

// Note the pattern....
for ($n = 2; $n < 7; $n++) {
   $f[$n] = $f[$n - 1] + $f[$n - 2]; 
}

echo 'b: ' , $f[2] , ' ' , 'a: ' , $f[3];

?>

eStrategy · 08-17-2009, 10:43 AM

Just a quick one cos im supposed to be working really.

PHP Code:


			
<?php

    $a = 1;
    $b = 2;
    
    $ar = array('cat'=>$a&97,'dog'=>$b&98);
    $a = $ar['dog'];
    $b = $ar['cat'];
    
    echo 'a: '.$a.'<br />b: '.$b;
?>

core1024 · 05-27-2010, 12:57 PM

I see this threat is old, but I like classics

Here is my try:

PHP Code:


			
$a=1;
$b=2;
function swab($x,$y){
  global $a;
  $a=$y;
  $y=$x;
}
swab($a,&$b);
echo "\$a=$a; \$b=$b";

Monferno · 05-31-2010, 04:11 PM

Wow. Never thought that there were this many ways to do this.
Mine is:

PHP Code:


			
$a = 1;
    $b = 2;
    
    $a = $a - $b;
    $b = $b + $a;
    $a = $a + ($b + $b + $b);
    
    print "\$a = $a & \$b = $b";

cheekote · 08-10-2010, 05:10 AM

Hmmm no need to do any strange math on this one.
You can use the HowPoliticiansDoIt Design Pattern created by the GoF.

PHP Code:


			
$a = 1;

$b = 2;

echo '$a = 2' . "\n";

echo '$b = 1';