There will be 10! entries in the the hash. Extrapolating the size it takes to store 10!/10, 10!/5 and 10!/2 10 character strings in a hash, I estimate the needed size to be around 170Mb. Trying to stuff 10! of those strings in a hash cause all the machines I tried it on to swap - with top showing a memory usage of around half a Gb of the running program.
Perl --((8:>*

In reply to Re^2: Determining uniqueness in a string. by Perl Mouse
in thread Determining uniqueness in a string. by Yzzyx

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