Archive for February, 2012

Copying files between computers

Posted by Vitalie Ciubotaru

The main problem that arises when using several computers is how to keep files synchronized. There are dozens of solutions, and mine is probably not the optimal one. However, these tricks work out for me and I want to share. Besides, I just want to put down some of those long pipes I constructed, so that I don’t need to keep them in my mind. (more…)

Idea: Online database of stolen bicycles

Posted by Vitalie Ciubotaru

About a year ago somebody “borrowed” my bicycle and forgot to return it. I was sort of insured by — in case of a theft I was entitled to buy a new one from the same seller with a huge discount. All I needed for this was to prove that it had actually been stolen. So I had to report the theft to the police, wait (ten days or two weeks, I don’t remember), have them issue a certificate and take it to the bicycle shop. (more…)

Idea: anonymous community

Posted by Vitalie Ciubotaru

From time to time I read about anonymous boards, sorta open-entry communities, formed around some phenomenon. The first example of such board is, of course, 4chan (no, I never read it — the “of course” is solely due to the large number of references to that particular website). As far as I know, anyone can post there and no registration/authorization is required. Very impressive, but… (more…)

Searching for data is always frustrating. While updating (or rather extending it back into the past) my personal database on CPI inflation I had to make my way through the jungle of different formats, time-spans, frequencies etc. that come from different statistical bodies (by the way, of all statistical agencies I checked out these days, UK’s Office for National Statistics is the weirdest! Just my humble opinion, of course).

When there was just a couple of gaps left, I turned to Inflation.eu. They got a nice web-site and, more importantly, they got data I needed. Unfortunately, there was no easy way to export these data — one has to select part of the page, paste it somewhere and clean it of rubbish like text and percentage marks. It would take ages to rip all those sparse figures … but wait, I got a perfect toolkit for this kind of job. After five minutes of “googling” and fine-tuning the tools my one-line monster script was ready. Here’s how it looks:

for i in {2006..2011}; do curl -s http://www.inflation.eu/inflation-rates/poland/historic-inflation/cpi-inflation-poland-${i}.aspx | grep "nbsp;%" | cut -d"<" -f2 | cut -d">" -f2 | cut -d"&" -f1 | awk 'NR % 2 == 0' | sed 's/$/+100/' | bc -l; done

This script crawls through all webpages that contain the data I need, searches for my figures, formats them into a human-readable form and displays them. Of course, it can be further improved, say, to add a date column, write data to a file etc., but it’s already done the job and I probably won’t need it any time soon. I just couldn’t resist bragging a bit about my script (and praising the unix-way, of course!).