On 01/21/2013 01:39 PM, Oscar Benjamin wrote:
On 21 January 2013 12:06, Ferrous Cranus <nikos.gr...@gmail.com> wrote:
Τη Δευτέρα, 21 Ιανουαρίου 2013 11:31:24 π.μ. UTC+2, ο χρήστης Chris Angelico
έγραψε:
Seriously, you're asking for something that's beyond the power of
humans or computers. You want to identify that something's the same
file, without tracking the change or having any identifiable tag.
That's a fundamentally impossible task.
No, it is difficult but not impossible.
It just cannot be done by tagging the file by:
1. filename
2. filepath
3. hash (math algorithm producing a string based on the file's contents)
We need another way to identify the file WITHOUT using the above attributes.
This is a very old problem (still unsolved I believe):
http://en.wikipedia.org/wiki/Ship_of_Theseus
Oscar
That wiki article gives a hint to a poosible solution -use a timestamp
to determine which key is valid when.
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