I think you meant 
 swap(\$a[$i], \$a[$random]);

[download]
Which looks like it may work. But randomness always got me confused (and into furious rows with my math teacher, but that's another story).

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^2: Random Derangement Of An Array by Joost
in thread Random Derangement Of An Array by Limbic~Region

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