character page 4 - Dave's Blog

Which which - Batch File Hackiness

2007 Aug 9, 5:41To satisfy my hands which have already learned to type *nix commands I like to install Win32 versions of common GNU utilities. Unfortunately, the which command is a rather literal port and requires you to enter the entire name of the command for which you're looking. That is 'which which' won't find itself but 'which which.exe' will. This makes this almost useless for me so I thought to write my own as a batch file. I had learned about a few goodies available in cmd.exe that I thought would make this an easy task. It turned out to be more difficult than I thought.

for /F "usebackq tokens=*" %%a in ( `"echo %PATH:;=& echo %"` ) do (
    for /F "usebackq tokens=*" %%b in ( `"echo %PATHEXT:;=& echo %"` ) do (
        if exist "%%a"\%1%%b (
            for  %%c in ( "%%a"\%1%%b ) do (
                echo %%~fc
            )
        )
    )
)

The environment variables PATH and PATHEXT hold the list of paths to search through to find commands, and the extensions of files that should be run as commands respectively. The 'for /F "usebackq tokens=*" %%a in (...) do (...)' runs the 'do' portion with %%a sequentially taking on the value of every line in the 'in' portion. That's nice, but PATH and PATHEXT don't have their elements on different lines and I don't know of a way to escape a newline character to appear in a batch file. In order to get the PATH and PATHEXT's elements onto different lines I used the %ENV:a=b% syntax which replaces occurrences of a with b in the value of ENV. I replaced the ';' delimiter with the text '& echo ' which means %PATHEXT:;=& echo% evaluates to something like "echo .COM& echo .EXE& echo .BAT& ...". I have to put the whole expression in double quotes in order to escape the '&' for appearing in the batch file. The usebackq and the backwards quotes means that the backquoted string should be replaced with the output of the execution of its content. So in that fashion I'm able to get each element of the env. variable onto new lines. The rest is pretty straight forward.

Also, it supports wildcards:

C:\Users\davris>which.cmd *hi*
C:\Windows\System32\GRAPHICS.COM
C:\Windows\System32\SearchIndexer.exe
D:\bin\which.exe
D:\bin\which.cmd

which cmd technical batch for

Chicken Roundup

2007 Jul 11, 3:52I realized that I have short list of chicken related things I find humorous and they're all available for the linking to via youtube.

Chicken: The Powerpoint Presentation. This is a power point presentation of a research paper written in the language chicken. (video)

Bluth Family Chicken Dances. From the show Arrested Development many Bluth family members had their own chicken dance. (video)

Peter Fights the Giant Chicken. A man sized chicken fights Peter from Family Guy for multiple minutes in several episodes mimicking famous action sequences. I must admire the writers dedication to the gag. (video1, video2)

roundup video personal chicken humor nontechnical

Second Life Translator

2007 Jul 4, 10:58Hackdiary
I really enjoy reading Matt Biddulph's blog hackdiary. An entry some time ago talked about his Second Life flickr screen which is a screen in Second Life that displays images from flickr.com based on viewers suggested tags. I'm a novice to the Second Life scripting API and so it was from this blog post I became aware of the llHTTPRequest. This is like the XMLHttpRequest for Second Life code in that it lets you make HTTP requests. I decided that I too could do something cool with this.

Translator
I decided to make a translator object that a Second Life user would wear that would translate anything said near them. The details aren't too surprising: The translator object keeps an owner modifiable list of translation instructions each consisting of who to listen to, the language they speak, who to tell the translation to, and into what language to translate. When the translator hears someone, it runs through its list of translation instructions and when it finds a match for the speaker uses the llHTTPRequest to send off what was said to Google translate. When the result comes back the translator simply says the response.

Issues
Unfortunately, the llHTTPRequest limits the response size to 2K and no translation site I can find has the translated text in the first 2K. There's a flag HTTP_BODY_MAXLENGTH provided but it defaults to 2K and you can't change its value. So I decided to setup a PHP script on my site to act as a translating proxy and parse the translated text out of the HTML response from Google translate. Through experimentation I found that their site can take parameters text and langpair queries in the query like so: http://translate.google.com/translate_t?text=car%20moi%20m%C3%AAme%20j%27en%20rit&langpair=fr|en. On the topic of non US-ASCII characters (which is important for a translator) I found that llHTTPRequest encodes non US-ASCII characters as percent-encoded UTF-8 when constructing the request URI. However, when Google translate takes parameters off the URI it only seems to interpret it as percent-encoded UTF-8 when the user-agent is IE's. So after changing my PHP script to use IE7's user-agent non US-ASCII character input worked.

In Use
Actually using it in practice is rather difficult. Between typos, slang, abbreviations, and the current state of the free online translators its very difficult to carry on a conversation. Additionally, I don't really like talking to random people on Second Life anyway. So... not too useful.personal translate second-life technical translator sl code google php llhttprequest

Ozzie

2007 Jun 25, 3:13I keep seeing 'Ozzie' on emails and such now due mainly to Ray Ozzie who is now the Chief Software Architect at Microsoft and his brother Jack Ozzie. Whenever I see his name I think of Ozzie from Chrono Trigger. He was one third of a trio of villains, the other two being Flea and Slash. I feel like I should be thinking of the Ozzy for which this Ozzie was named but I really don't.

My next thought on Ozzie is the Scottish guy who went to my high school. He'd shout 'Ozzie! Ozzie! Ozzie!' to which listeners were compelled to respond 'Oi! Oi! Oi!'. The wikipedia article on the chant has some thoughts on the origins but I suppose at Microsoft it could take on entirely new meaning. I really hope I'm someday in a meeting with Ray or Jack Ozzie and have the opportunity...ozzy personal ozzie random nontechnical

Movie Times

2007 May 1, 3:48The Sunday of the weekend before last I had friends over and we watched Antitrust and Sneakers. Watching Antitrust makes me wonder if Bill Gates has seen it. Tim Robbins plays a character that is essentially based on him but so over the top that its ridiculous.

A few days before that I watched The Prestige with Sarah. I can't tell if I was or wasn't supposed to know what was going on until the end but it was cool anyway. I didn't know until later but David Bowie plays Tesla which is just awesome all the way around.

We also watched The Illusionist sometime before. Both movies are adaptations of novels with stage magicians set in turn of the century England. And I enjoyed both of them. I thought one would be a rushed attempt by one studio to compete with the another on the same ground but that doesn't seem to be the case. I've noticed this before with those asteroid disaster movies and the two movies about Truman Capote. It turns out Wikipedia has a huge list of competing similar movies.personal movies nontechnical