Me to (with regards to temp files) - the trouble is that NOT using a temp file would (afaik) double my memory requirements to 2 times the largest temp file.

Basically, the output_data routine steps through the temp-file line-by-line, pushing the data to various arrays, hashes, etc. - so not using a temp-file would mean that I end up allocating memory to the raw data as well as the various arrays and hashes which contain the processed data.

map{$a=1-$_/10;map{$d=$a;$e=$b=$_/20-2;map{($d,$e)=(2*$d*$e+$a,$e**2
-$d**2+$b);$c=$d**2+$e**2>4?$d=8:_}1..50;print$c}0..59;print$/}0..20
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