Ok so on that input it doesnt work.

I guess now I'm being a pain, but japhy's spec *did* say make a function that takes any number of equal-length strings

However I do believe in defensive programming, so I can see why you did that.

Very interesting, and food for thought

Yves

$\="\n"; $,=",";
print r("0000", "0000", "0000");
#outputs
#000,000,000,000
[download]