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Re^3: Perl oddities

by jmcnamara (Monsignor)
on Mar 01, 2005 at 16:26 UTC ( #435510=note: print w/replies, xml ) Need Help??


in reply to Re^2: Perl oddities
in thread Perl oddities


In the above case yes but as the number of keys is increased the buckets will get reused and the result won't be correct:
$ perl -le '%h = (1 .. 10); print scalar %h' 5/8 $ perl -le '%h = (1 .. 12); print scalar %h' 5/8 $ perl -le '%h = (1 .. 100); print scalar %h' 33/64
:-)

Actually, I searched for a genuine use for this feature for a long time and I almost found one: Power Twool.

--
John.

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Re^4: Perl oddities
by fergal (Chaplain) on Mar 01, 2005 at 18:19 UTC
    Oops. I completely misread your original post. I thought it was elements/buckets, not used/total. That said, given Perl's non-object data model, the only other way to provide this info would be through yet another function.

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[Corion]: Hmm. I think overnight I decided on simplifying some code. I have plugin classes that do data import (.csv, .yml, .json) and for that create objects on which then ->load() is called. But YAML::XS doesn't have an object, so I wrote my own wrapper.
[Corion]: This evening, I'll kill that wrapper again, and just call LoadFile() in the plugin class directly instead of creating a go-between object for no real gain.
[Corion]: Writing these import plugins was really nice though - in about 2 hours, I had imports for CSV, YAML and JSON, and adding XLS(X), SQLite (or DBI) data sources is also trivial. I'm idly wondering about separating the plugin into transport+parser, so ...
[Corion]: ... http:// URLs could be retrieved and then parsed, but I think that that would be overkill for a toy static site generator ;)

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