code name

They do a pretty cool thing: force you to tell “the truth” — no matter how subjective this term is — as opposed to emasculated official style:

• what you really did (whatever it means to you);
• what opensource/published projects did you participate in;
• Top Stack questions you answered;
• your professional reading and (sic!) writing.

Here I am: http://careers.stackoverflow.com/victors
(have to complete it still)

Got 5 invites btw.
Actually, just testing a new LiveJournal crosspost plugin.

I wonder why this was not in JDK/Groovy Collections.

Just put together a Comparator for StackOverflow question – a Groovy Comparator that would sort class field names in the declaration order. Feel free to use:

class PropComparator implements Comparator {
    private Class clazz
    PropComparator(Class clazz) { this.clazz = clazz }

    int compare(Object o1, Object o2) {
        clazz.declaredFields.findIndexOf{it.name == o1}
          - clazz.declaredFields.findIndexOf{it.name == o2}
    }
}

It hasn’t even been a ten years that DB2, one of the most, er, expensive DBMSes, got a feature needed by every other application – dataset paging.

Before, you had to use window functions rownumber() and fetch first 40 rows only. When used by Hibernate, this resulted ugliness like:

select * from (
  select inner2_.*, rownumber() over(order by order of inner2_) as rownumber_
  from (
    select  ...
    fetch first 40 rows only
    ) as inner2_
  ) as inner1_
where rownumber_ > 20
order by rownumber_

Since this summer version – DB2 9.7.2 – you can just append LIMIT and OFFSET: More…

Just in case someone needs a code snippet.
This one groups Prices by PriceProvider and was intended to pick only last 5 values for each PriceProvider – but sadly, it’s impossible without window functions. Which are not supported in Hibernate in any way.
More…