Re: generate unique codes

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Jun 12, 2012 04:30 PMgerrylowryLINK

@ dofoo

dofoo

pretty sure that I generate uinique codes

FWIW, if you requre 'unique codes', 'pretty sure' is insufficient.

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Strong Password Generator to create secure passwords that are impossible to crack on your device without sending them across the Internet, and learn over 30 tricks to keep your passwords, accounts and documents safe. Jan 03, 2015  Hi, how can i generate unique alphanumeric like this example EA070998 EA011575 HK144331 A0058579 Thank you in advance.

i've run variations* on code downloaded from the article http://www.codeproject.com/Articles/14403/Generating-Unique-Keys-in-Net suggested by RameshRajendran above.

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N.B.: ¡ almost certainly, duplicates ARE produced !

N.B.: ¡ my investigation is not complete !

in one test, my first duplicate was encountered after 2 379 101 (two million iterations).

in many tests, i run out of memory ('System.OutOfMemoryException') before encountering a duplicate.

dofoo, i've not tested your method for duplicates; your method should produce more duplicates because it's the hexadecimal value of an Int32 .. the method from

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to me, it appears the above string is the major influence on Altaf Al-Amin's algorithm .. you have (26 + 26 + 10) characters for each of eight character positions, i.e., 62 to the eight power .. a very large number but nevertheless a finite number.

WHENEVER one is dealing with finite combinations, if unique values are required, it is prudent to check for duplicates! Git bash generate ssh key windows pub.

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g.

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* code variation (this variation has imperfections, especially in the catch block):

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