[pgrouting-dev] How many people use the wrapper functions?

[Daniel Kastl]

On Tue, May 14, 2013 at 2:07 AM, Worth Lutz <wal3 at mindspring.com> wrote:

> ** ** **
>
> I think that the “Gists” idea is a good one.  I like the idea of having
> some simple wrapper examples which demonstrate a concept. They do not have
> to be the solution to everyone’s problem.
>

The advantages Gists are:

   - they can be discussed (comments beneath the source)
   - they keep a reference to the author
   - they can be forked
   - no need to handle permissions for writing as it had to be for a
   "contrib" repository

So we could copy the current wrapper functions into Gists and then everyone
could help to make them better.

"Highlights" could then also be linked in the manual or used for the
tutorial.

You can already start:
https://github.com/pgRouting/pgrouting/wiki/Writing-functions ;-)

Daniel


****
>
> ** **
>
> An example of this would be the method demonstrated in the “only” wrapper
> in the “pgrouting-contrib” directory: How to split the nearest edge to a
> point and route from the point to the split point and then to the same
> situation at the other end.****
>
> ** **
>
> I’m sure there are other simple concepts which could be demonstrated in a
> similar fashion.****
>
> ** **
>
> Worth****
>
> ** **
>  ------------------------------
>
> *From:* pgrouting-dev-bounces at lists.osgeo.org [mailto:
> pgrouting-dev-bounces at lists.osgeo.org] *On Behalf Of *Daniel Kastl
> *Sent:* Monday, May 13, 2013 12:46 PM
>
> *To:* **pgRouting developers mailing list**
> *Subject:* Re: [pgrouting-dev] How many people use the wrapper functions?
> ****
>
>  ** **
>
> ** **
>
>  I also learned what I know of PL/pgSQL by modifying the wrappers and I
>
> would have had a really hard time implementing the 'edge splitting' on
> my own. So I'm really grateful I found the wrappers. On the other hand
> the wrapper I used wasn't even included in pgrouting, so I guess we'd be
> safe to have them outside the distribution, either in the docs or as an
> external download.****
>
>  ** **
>
> Daniel and I have discussed adding a contrib directory, but then we get a
> lot of stuff, that we don't know if it work with the current release. I
> think we would be more inclined to have a wiki page that links to 3rd party
> github projects or have a tips and tricks wiki page. The ideal situation is
> that we link to a page the you maintain because that de-clutters the
> pgrouting maintained pages and files.****
>
>  ** **
>
> The idea of the "pgrouting-contrib" repository was to provide a place for
> a collection of user-contributed wrapper functions.****
>
> But as you can see, the repository has been mostly inactive and there was
> no second wrapper added ever to the initial one.****
>
> So this was probably not a smart way to solve this ;-)****
>
> ** **
>
> Github Wiki pages are also somehow difficult to organize. ****
>
> Maybe Gist (https://gist.github.com/) + list on a Wiki page would be
> better ... but in the end it's important that someone is willing to share
> his code.****
>
> ** **
>
> I don't want to maintain the current (arbitrary) wrapper functions just to
> have some examples, but I know that it is difficult to find good resources
> about writing in pl/pgsql, and it's usually best to learn from good
> examples.****
>
> Right now I think that having some useful recipes and code snippets in the
> documentation would be best. And we could start the list of "Gists" with a
> few good wrapper examples, and then hope that more people will contribute
> with even better examples.****
>
> ** **
>
>  ****
>
> Daniel****
>
>
> ****
>
> ** **
>
> --
> Georepublic UG & Georepublic ****Japan****
> eMail: daniel.kastl at georepublic.de
> Web: http://georepublic.de ****
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-- 
Georepublic UG & Georepublic Japan
eMail: daniel.kastl at georepublic.de
Web: http://georepublic.de
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