Find The Next Number

fluticasone has asked for the wisdom of the Perl Monks concerning the following question:

Mr. fliticasone

Ok. Monks, this is tricky becuase it involves some math; I have an alpha numeric string which needs to find the next alpha numeric string; off hand certain alpha numerical characters are not available or validation box does not take those alpha characters. I know I could employ math to solve it but, would you know another method to find its numbers and letters on alpha characters, sort of like the lotto which tries to find its next of king. The alpha string is twenty five characters long, not using all alphabet letters or numbers 0-9. Pls Hint. splice @buffer, 0, 0, (splice @buffer, $start_index);

Comment on Find The Next Number

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Re: Find The Next Number by moritz (Cardinal) on Jun 16, 2012 at 06:07 UTC
By which rules should the next number be found? Or should it be random? Also I'm rather confused by statements like The alpha string is twenty five characters long, not using all alphabet letters or numbers 0-9. Pls Hint. If it doesn't contain alphabet letters, why do you call it "alpha string"? And if it's not made out of letters or numbers, what is it made of? punctuation? white space? Perl 6 - the future is here, just unevenly distributed	[reply]
Re: Find The Next Number by AnomalousMonk (Archbishop) on Jun 16, 2012 at 19:58 UTC
Pls Hint. Yes, please! Any hint at all would be most welcome. Some of the other monks who have replied seem to have some idea what the OP is about, but I'm still completely in the dark. Might fluticasone perhaps take a look at How do I post a question effectively?, How (Not) To Ask A Question and in particular I know what I mean. Why don't you?, and then post a clarification?	[reply]
Re: Find The Next Number by cheekuperl (Monk) on Jun 16, 2012 at 06:10 UTC
whoa! Let me see if I got it right: You have a 25 char alnum string like: `abcdef1234abcdef1234abcde` [download] Now, you need to find the next alnum string which IS/could be `bcdefg2345bcdefg2345bcdef` [download] Wat say? Is that the requirement?	[reply] [d/l] [select]
Re: Find The Next Number by cheekuperl (Monk) on Jun 16, 2012 at 06:57 UTC
Check which one is closer to your requirements: `$str="abcz123def456"; print "\nFirst interpret"; @arr=($str=~m/([a-zA-Z]+\|[0-9]+)/g); $nextstr= join("", map {++$_} @arr); print "\nString: $str"; print "\nNext: $nextstr"; print "\n\nSecond interpret"; @arr=split(//,$str); $nextstr=join("",map{++$_;$_=substr($_,-1,1);} @arr); print "\nString: $str"; print "\nNext: $nextstr";` [download] ----------- OUTPUT ---------------------- `First interpret String: abcz123def456 Next: abda124deg457 Second interpret String: abcz123def456 Next: bcda234efg567` [download]	[reply] [d/l] [select]
Re: Find The Next Number by frozenwithjoy (Priest) on Jun 16, 2012 at 06:09 UTC
Could you please give some concrete examples?	[reply]