It will be simpler if you just start out with a 96 element array and then go from there e.g 
my @points;
@points[1 .. 96] = (undef) x 96;
for (@grid) {
  /^(\d{1,2})$/ and $points[$1] = 1;
  ...
}

[download]
So at the end of your for loop your @points array will have 96 elements where their value will either be true or false. Also note the change in the regex as yours was somewhat broken (it tried to match 1-2 captures of one or more \d).
HTH

_________
broquaint

In reply to Re: Working with values that dont exist by broquaint
in thread Working with values that dont exist by Anonymous Monk

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