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#199448 - 2010-08-09 01:10 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
Benny69 Offline
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Brad,
Another way to shorten code is to try dropping an 'EndIf' or 'Next' or 'Loop', if your code is well organized this might save a few strokes. Also try reusing the same variable in different sections of the code.

Give it a try and show us what you come up with.
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#199449 - 2010-08-09 01:16 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
Benny69 Offline
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I get an 'Expected,)!' error when I try Jochen's code.
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#199450 - 2010-08-09 01:22 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
Benny69 Offline
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found it:
$b = 0^$
was transposed, should be:
$b = $^0
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#199451 - 2010-08-09 01:39 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
Benny69 Offline
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Jochen,
I love this bit of code:
(($b - ($^) & 1) + 1)
fliping between 1 and 2, dang creative, you da man.
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#199452 - 2010-08-09 01:50 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
Allen Administrator Online   shocked
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Interesting it doesn't work for you... works fine for me... using 4.61.
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#199453 - 2010-08-09 01:53 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Allen]
Benny69 Offline
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yup, useing 4.61, transposed it works fine.
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#199454 - 2010-08-09 01:55 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
Allen Administrator Online   shocked
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???? works either way for me... strange stuff.
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#199455 - 2010-08-09 01:58 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Allen]
Benny69 Offline
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well i guess that is the way the Bits fall off the Byte ;\)
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#199460 - 2010-08-09 05:35 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
Bryce Offline
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damn, here is my sherman tank (358) code...

 Code:
Function A($)

	
	dim $i, $x, $b, $l
	$l = len($)

	if $l = 15 or $l = 16
		redim $b[$l-1]
		for $i = 0 to $l-1
			$b[$i] = substr($,$i+1,1)
		next

		for $i = $l-2 to 0 step -2
			$x = 2*$b[$i]
			$b[$i] = iif($x>9,0+left($x,1) + right($x,1),$x)
		next

		$i = execute("$X="+join($b,'+'))
			
		if right($x,1) = 0
			$B = left($,1)
			if $b = 3
				if $l <> 15
					$b = 0
				endif
			else
				if instr('456',$b)
					if $l <> 16
						$b = 0
					endif	
				else
					$b = 0
				endif
			endif
		else
			$b = 0
		endif
	else
		$b = 0
	endif
	$a = $b


Endfunction


I never really got beyond the "can i even do it phase"

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#199461 - 2010-08-09 09:57 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
Jochen Administrator Offline
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 Originally Posted By: Benny69
Jochen,
I love this bit of code:
(($b - ($^) & 1) + 1)
fliping between 1 and 2, dang creative, you da man.


Wahey Dale,
yeah, this was my last hope on sunday morning shaving further than 146 strokes, sparing one variable. But that turned out to be a dead end as I had to use much more parentheses than initially thought.
Here's what it looked like before:

 Code:
dim ... ,$b
...
    while $
        $b = ~$b
        $c = (2+$b) * right($,1)
        ....


So, there was no money in that either..

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#199462 - 2010-08-09 12:26 PM Re: KixGolf: Luhn's Mod - Public Round [Re: Jochen]
Jochen Administrator Offline
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Borrowing the excellent idea Maciep had introducing into mine I would have had 140 .. Not that this would have changed the board but hey. I like the look of this

 Code:
function a($)
    dim $b, $c, $d
    $b = 0^$
    while $
        $c = (($b-($^) & 1)+1) * right($,1)
        $d = $d + $c-9*($c>9)
        $a = ($d mod 10 =) * ($>2&$<7&$b+($<4)=16) * $
        $ = left($,~)
endfunction


Funny how some things don't come to your mind when you stare at your own code for a week.
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#199463 - 2010-08-09 02:13 PM Re: KixGolf: Luhn's Mod - Public Round [Re: Jochen]
Benny69 Offline
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here is Lonk's code at 133:

 Code:
Function A($b)
Dim $t,$,$x

For $t=0 to 99
 $=Right($b,1)
 $x=$t mod 2*((4<$)+$)+$+$x
 $b=Left($b,~)
 If $
  $a=($t=15-(3=$) & 2<$ & 7>$ & $x mod 10=)*$
EndFunction


Edited by Benny69 (2010-08-09 02:13 PM)
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#199464 - 2010-08-09 03:47 PM Re: KixGolf: Luhn's Mod - Public Round [Re: Allen]
Glenn Barnas Administrator Offline
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Back at the office - I can post my "179" code, with comments added
 Code:
Function A($)
  Dim $D,$F,$I,$S			; Digit, Flag, ID, Sum
  $A=0					; default return
  $D=Len($)				; CC # length
  $I=Left($,1)	;			; CC Issuer ID
  If ($D=15&$I=3)|$D=16&$I>3&$I<7	; verify ID/# Digits
    While $				; while digits
      $D=(1+$F)*Right($,1)		; Get digit and optionally double
      $S=$S+IIf($D>9,$D-9,$D)		; sum digit
      $F=$F^1				; flip odd/even flag
      $=Left($,~)			; trim string
    Loop
  ; common code
    If $S Mod 10 = 0			; if CC is valid
      $A=$I				; return issuer code
EndFunction
Glenn
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#199465 - 2010-08-09 04:20 PM Re: KixGolf: Luhn's Mod - Public Round [Re: Glenn Barnas]
Allen Administrator Online   shocked
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I've never seen/noticed this before (added to my list of cheats) ... nice!

$F=$F^1 ; flip odd/even flag

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#199466 - 2010-08-09 05:10 PM Re: KixGolf: Luhn's Mod - Public Round [Re: Benny69]
DrillSergeant Offline
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starting to look a bit like my code ;\)

 Originally Posted By: Benny69
here is Lonk's code at 133:

 Code:
Function A($b)
Dim $t,$,$x

For $t=0 to 99
 $=Right($b,1)
 $x=$t mod 2*((4<$)+$)+$+$x
 $b=Left($b,~)
 If $
  $a=($t=15-(3=$) & 2<$ & 7>$ & $x mod 10=)*$
EndFunction
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#199467 - 2010-08-09 08:51 PM Re: KixGolf: Luhn's Mod - Public Round [Re: Allen]
Jochen Administrator Offline
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 Originally Posted By: Allen
I've never seen/noticed this before (added to my list of cheats) ... nice!

$F=$F^1 ; flip odd/even flag


If it had to be exactly 0 and 1 it'd be perfect. But we need to do (1+$f) before! in this loop..

So, as we can save one stroke (as shown a couple posts before) by doing:

$F=~$F (toggling between -1 and 0 and afterwards! doing (2+$f))

my version should enter your cheat book too ;\)

Edit: Aw, what the hell, here's my other version with 146:

 Code:
function a($)
    dim $b, $c, $d, $e
    $e = $^0
    while $
        $b = ~$b
        $d = (2+$b) * right($,1)
        $c = $c + $d-9*($d>9)
        $a = ($c mod 10 =) * (($e=15&$=3)|$e=16&$>3&$<7) * $
        $ = left($,~)
endfunction


See what I mean?


Edited by Jochen (2010-08-09 08:53 PM)
Edit Reason: pfffrz
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#199468 - 2010-08-09 10:10 PM Re: KixGolf: Luhn's Mod - Public Round [Re: Jochen]
Jochen Administrator Offline
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OMG!
I am such a dumbf***.
Why haven't I seen this on sunday morning

 Code:
function a($)
    dim $b, $d
    $b = 0^$
    while $
        $a = (($b-($^) & 1)+1) * right($,1)
        $d = $d + $a-9*($a>9)
        $a = ($d mod 10 =) * ($>2&$<7&$b+($<4)=16) * $
        $ = left($,~)
endfunction


= 137

and the same for my other version:

 Code:
function a($)
    dim $b, $c, $e
    $e = $^0
    while $
        $b = ~$b
        $a = (2+$b) * right($,1)
        $c = $c + $a-9*($a>9)
        $a = ($c mod 10 =) * ($>2&$<7&$e+($<4)=16) * $
        $ = left($,~)
endfunction


= 137 as well..


Edited by Jochen (2010-08-09 10:39 PM)
Edit Reason: blargh
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#199469 - 2010-08-10 08:59 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Jochen]
It_took_my_meds Offline
Hey THIS is FUN
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Registered: 2003-05-07
Posts: 273
Loc: Sydney, Australia
I really enjoy seeing the ingenious solutions presented in KiXgolf.

@Drill - Wow, well done, I'm really impressed, I think your solution is fantastic!

@Allen - I'm glad you put on such a good challenge.

It's a pity Jen's didn't/couldn't play. It's such a selfless act to put on a challenge and it would have been good for him to finally get to play.

As for me, I've played a couple of times in the past but never did very well. I would have liked to have played this time but was away on holidays (skiing). I hope more challenges come, they really demonstrate the flexibility of KiXtart and I think they're great for helping good scripters learn advanced techniques.

Cheers,

Richard

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#199470 - 2010-08-10 11:03 AM Re: KixGolf: Luhn's Mod - Public Round [Re: It_took_my_meds]
Lonkero Administrator Offline
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Posts: 22343
Loc: OK
benny, damn. good catch!
that was stupid of me!
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#199471 - 2010-08-10 11:55 AM Re: KixGolf: Luhn's Mod - Public Round [Re: Lonkero]
Lonkero Administrator Offline
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Posts: 22343
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129 out of mine:
 Code:
Function A($b)
Dim $t,$,$x

For $t=0 to 99
 $=0+Right($b,1)
 $x=1 & $t *($/5+$)+$+$x
 $b=Left($b,~)
 If $
  $a=(2<$ & 7>$ & $t=14+$/4 & $x mod 10=)*$
EndFunction
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