Re^4: Iterate string like, for(1..5) i.e. $stirng="1..5"; for($string)

[gman]

The input will be constrained and only allow ".." "," and digits.
And the digits will only be positive whole numbers.
I have not worked out the regex for this,
but yours is a starting point.

And thank you for the explaination of your solution!

[GrandFather]

This may be of interest:

my @ranges = ('2..5,10..15', '2..5', 'die', '-2..5,10..15');
my $match = qr /^\d+\.{2}\d+(,\d+\.{2}\d+)*/;

print ((m|$match| ? "ok:       " : "Rejected: ") . "$_\n") for (@range
+s);

No need to throw out the eval through pathalogical fear when validating the data in a simple fashion removes the danger of an exploit.