> plus I imagine certain set operations would be problematic due to floating-point inaccuracies.
I doubt this, rounding errors happen only after arithmetic operations

I was thinking something like:

$ perl -MSet::IntSpan -le 'print Set::IntSpan->new("1-10")->complement
+->run_list'
(-0,11-)

[download]

What's the equivalent with floating-point? Does the lower range end at 0.9, 0.99, 0.999, 0.9999, ...? I know there's probably a mathematically valid answer, but I wonder how it would be represented as a floating-point number.

Another one:

use Set::IntSpan;
my $set = Set::IntSpan->new('3-12,25-30,42');
for ( my $el=$set->first; defined $el; $el=$set->next ) {
    print "$el\n";
}

[download]

Workarounds would be possible, like telling the iterator what size steps it should take.

I'm not the module's author, so I can't tell you any more "why" and "why not" :-) It's probably possible to write a similar module that handles floats, but Set::IntSpan isn't it ;-)

Update: And, of course it's possible to work with decimals if you multiply them by the appropriate factors, like how I work with milliseconds instead of seconds in Determining Gaps and Overlap in Timestamped Data.

In reply to Re^6: Comparing a value to a list of numbers (updated) by haukex
in thread Comparing a value to a list of numbers by g_speran

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