If your goal is to read 50 items into an array on each pass of the loop:
while (!eof DATA) {
local $/="\t";
chomp(my @set = map {(eof) ? () : scalar(<DATA>)} 1..50);
print "Set: ", join(',', @set), "\n";
}
Use whatever filehandle is appropriate.
Update: changed second eof to use "last file read" default form.
Caution: Contents may have been coded under pressure.
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