11 pages tagged with "programming"

I see periodically people handling errors in deferred calls like this: func Do() (r Result, err error) { // ... defer func() { err = multierr.Append(err, f.Close()) }() // ... } or another variant: func Do() (err error) { // ... defer func() { err1 = f.Close(… read more

<p>Recently we decided to localize country selection list at work and there was some confusion about how to sort Chinese characters. I asked my wife and she told me that sorting by pinyin is seems most reasonable to her. So here's how to do it in Perl read more

Today deployed at work a new service that based on zeromq. I never liked zeromq because it does not provide any feedback about what is going on, and this is exactly what caused problems. After deployment service worked as expected on all servers except one. Daemon was starting, creating zeromq sock… read more

Recently I got a lot of failures from CPAN Testers for RedisDB on NetBSD i386. After investigating a bit I've found that NetBSD 6.0 comes now with 64-bit time_t on all architectures. It means that the way I used to pack struct timeval value to set timeout on socket, didn't work anymore. Previously i… read more

<p>Spent the whole day looking for sources of memory leaks. One of them was because I decided to use named captures. It so happened that perl leaks some memory if named capture doesn't match. read more

Just uploaded RedisDB-1.03 to CPAN. In this version I extracted parser code into a separate module and cleaned it up a bit, I have in plans writing XS version of the parser. Another significant change is that I dropped Module::Install and switched to plain ExtUtils::MakeMaker. The size of the distri… read more

Just uploaded RedisDB 0.16 to CPAN. Hopefully now it will work on Windows. The problem is that Windows don't support MSG_DONTWAIT flag for recv, so I have to switch socket into non-blocking mode before checking for data. And I got just a single test report for MSWin32 for three months, apparently it… read more

After upgrading Perl to 5.10.1 at Friday I found that POE::Component::Server::PreforkTCP, which we use in one of our products, doesn't pass its tests anymore. Perhaps it's possible to fix, I don't know yet (it was Friday evening...), but as the module hasn't been updated since 2002 I decided to chec… read more

As you may know there is such a thing as a leap second, and Dec 31 2008 is a day with a leap second. A couple of hours before New Year I got an idea to catch this leap second. The problem is that Linux uses Unix time and thus ignores leap seconds. Hence if you use time(2) or gettimeofday(2), the lea… read more

Now suppose you want to rid string of malformed utf-8 characters. Here is an example that checks an utf-8 string and replaces all malformed characters with '?'. The same idea as in the previous post. Note, that it checks only encoding, it is possible that encoding is correct, but the symbol doesn't … read more

<p>Suppose you need to put UTF-8 string into a fixed length buffer. Actually I was in need to do this. Problem is that the last symbol may be incomplete, so here is the example how to do this read more