I ran into the following error while trying to run a binary generated by GHC 6.8.x on our production machines with a not-so-recent linux installed (kernel 2.6.9).   $ ./restyscript   restyscript: time

数据库中的 id 有时会产生大量空洞，有时是因为分批导入数据时漏了边界上的一些记录，有时则是因为数据有频繁的删除操作，浪费了大量在 id 对应的 sequence 空间。这时就需要找出 id 序列中的空洞，即记录 id 不连续的地方。一般地，找出"空洞"区间的左边界列表可以使用类似下面的 SQL 语句：   select id from store where (id + 1) not in (s

After reading Audrey's blog post mentioning GHC's upcoming quasiquoting feature (as well as that quasiquoting paper), I quickly hacked up a (simple) quasiquoting mechanism for Perl, hence the Filter::

A few hours' hack gives rise to the following funny stuff:  test=# select openresty_init();    openresty_init   ----------------    t  (1 row)   test=# select openresty_request(  test=#   'GET', '/=/v

I've been building debian packages for OpenResty and its dependencies that are not already in the official Ubuntu debian repository. Here's what I got yesterday:   http://agentzh.org/misc/debian/