[Bioperl-l] Bio::FeatureHolderI

[Ewan Birney]

On Mon, 18 Nov 2002, Lincoln Stein wrote:

> I agree with Ewan and Jason that internal filters allow you the efficiency of
> implementing the filter in SQL.  I thought of proposing this, but I don't
> want to add something this radical to the API just before 1.2.  Another issue
> is that if we're going to implement internal filters, then we should do it
> right, allowing for filtering by location, feature type, source tag, etc.,
> and for arbitrary boolean combinations of these attributes.
>
> Another thought that occurred to me is that it would be very nice to be able
> to pass in a subroutine that is simply passed each feature, without the
> features being stored in a memory.  This sort of functional programming is
> very nice when the features are coming from a SAX-based XML parser, where it
> is difficult, if not impossible, to implement a next_feature() style iterator
> in the caller.

Agreed (on both points). We should definitely do this post 1.2...