The above comment would be true if it did $c = int(rand @_), but it doesn't. It just uses the floating point value returned from rand as a hash key. There are unlikely to be any collisions, even shuffling 1000000 numbers. You can test this with: 
perl -wle'undef $x{rand()} while keys(%x) == $x++; print $x'

[download]
which adds keys until it gets a collision. Be prepared to wait a very long time.

In reply to Re: Re: Answer: How can I print all the numbers from 1 to n in random order? by ysth
in thread How can I print all the numbers from 1 to n in random order? by vroom

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