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Groups > comp.lang.python > #37304

Re: Converting a string to a number by using INT (no hash method)

Date 2013-01-22 11:40 -0500
From Dave Angel <d@davea.name>
Subject Re: Converting a string to a number by using INT (no hash method)
References <e74ae1aa-f760-4123-8770-3b8a4f9a2f91@googlegroups.com>
Newsgroups comp.lang.python
Message-ID <mailman.808.1358872879.2939.python-list@python.org> (permalink)

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On 01/22/2013 11:15 AM, Ferrous Cranus wrote:
> I just need a way to CONVERT a string(absolute path) to a 4-digit unique number with INT!!! That's all i want!! But i cannot make it work :(
>
> And the best part is that "that" number must be able to turn back into a path.
>
> This way i DON'T EVEN HAVE TO STORE THE ACTUAL HTML PAGE'S ABSOLUTE PATH!!!!
>
> 1. User requests a specific html page( .htaccess gives my script the absolute path for that .html page)
> 2. I turn the path into a 4-digitnumber
> 3. i store that number to the database. I DONT EVEN HAVE TO STORE THE PATH TO THE DATABASE ANYMORE!!! this is just great!
>

I had prepared a detailed response, showing what your choices are with 
this new constraint.  But I can see from this post here that there's no 
point, so I've thrown it out.

Either you're trolling, or you have a very limited knowledge of 
mathematics.   This isn't a programming problem, it's a simple problem 
of information theory.

Unless you constrain your users to very restrictive filenames, what you 
ask here simply cannot be done.

Perpetual motion machine, anyone?  Or a compression algorithm which can 
be applied repeatedly to a chunk of data until it shrinks down to one 
byte?  No way to do it without cheating, and the literature is full of 
examples of people cheating.


-- 
DaveA

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Thread

Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 08:15 -0800
  RE: Converting a string to a number by using INT  (no hash method) "Leonard, Arah" <Arah.Leonard@bruker-axs.com> - 2013-01-22 16:27 +0000
    Re: Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 09:02 -0800
      RE: Converting a string to a number by using INT  (no hash method) "Leonard, Arah" <Arah.Leonard@bruker-axs.com> - 2013-01-22 17:24 +0000
        Re: Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 09:39 -0800
          Re: Converting a string to a number by using INT (no hash method) John Gordon <gordon@panix.com> - 2013-01-22 18:36 +0000
          Re: Converting a string to a number by using INT  (no hash method) Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-01-22 17:22 -0500
        Re: Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 09:39 -0800
        Re: Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 10:37 -0800
          Re: Converting a string to a number by using INT  (no hash method) Michael Torrie <torriem@gmail.com> - 2013-01-22 12:02 -0700
            Re: Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 11:28 -0800
              Re: Converting a string to a number by using INT  (no hash method) Alan Spence <alan.spence@ntlworld.com> - 2013-01-22 20:00 +0000
            Re: Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 11:28 -0800
              Re: Converting a string to a number by using INT (no hash method) John Gordon <gordon@panix.com> - 2013-01-22 20:40 +0000
                Re: Converting a string to a number by using INT (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-23 00:44 -0800
          Re: Converting a string to a number by using INT  (no hash method) Dave Angel <d@davea.name> - 2013-01-22 14:08 -0500
          RE: Converting a string to a number by using INT  (no hash method) "Leonard, Arah" <Arah.Leonard@bruker-axs.com> - 2013-01-22 20:30 +0000
          Re: Converting a string to a number by using INT  (no hash method) Dave Angel <d@davea.name> - 2013-01-22 15:43 -0500
        Re: Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 10:37 -0800
    Re: Converting a string to a number by using INT  (no hash method) Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-01-22 09:02 -0800
  Re: Converting a string to a number by using INT  (no hash method) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-01-22 16:27 +0000
  Re: Converting a string to a number by using INT  (no hash method) Dave Angel <d@davea.name> - 2013-01-22 11:40 -0500
    Re: Converting a string to a number by using INT (no hash method) alex23 <wuwei23@gmail.com> - 2013-01-22 17:32 -0800
      Re: Converting a string to a number by using INT (no hash method) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-23 03:02 +0000
        Re: Converting a string to a number by using INT (no hash method) alex23 <wuwei23@gmail.com> - 2013-01-22 19:59 -0800
  Re: Converting a string to a number by using INT  (no hash method) "D'Arcy J.M. Cain" <darcy@druid.net> - 2013-01-22 12:04 -0500

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