[Perl] my quiz (easy)

[Shlomo Yona]

Hello.

Write a sub which receives some integer number 
greater than zero (lets call the number N), and
return a string of N characters (over [A-Za-z0-9]).

Calling the sub within the same run of the program should 
guarantee no two strings of length N are equal (i.e. all the
strings of same length are uniqe).

Good luck.

Let's see who writes the nicest and perhaps smartest peace of code.


-- 
Shlomo Yona
shlomo at cs.haifa.ac.il
http://cs.haifa.ac.il/~shlomo/