Why not cycle through the top-level array, shifting off the bottom element in each sub-array? Something like
@array = ([1,2,3],[4,5,6],[7,8,9]);
while (grep scalar @{ $_ }, @array) {
for $i (@array) {
print shift @{ $i };
}
}
This has the merit that not only do you not need to code (or even initialise, or know) the number and length of sub-arrays, but they can also be of different lengths.
§ George Sherston
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