change application context in grails

to change the application context in a grails app,
in Config.groovy add grails.app.context=/mycontextpath

creating an iso from file on linux

I have a file that I need to convert to iso so that I can mount it cd a CDROM in QEMU. Here's how to do it:

mkisofs -o foo.iso foo.file

change postgres user password

ALTER USER postgres WITH PASSWORD '';

groovy script to rename a lot of files

I got a hold of 1692 mp3 files of Chinese characters for a Chinese-English dictionary that I wrote with my 16year old cousin to introduce him to programming in Groovy. The dictionary is called xiaosu cidian 小苏词典 http://www.diningphilosophers.net/xiaosu

The mp3 files are all in uppercase but I wanted them in lower case. Here's the script I wrote to do that:

new File(".").eachFile{ f->
def cmd = "mv $f.name ${f.name.toLowerCase()}"
cmd.execute()
}

Much easier than with Java!

internationalization (i18n) in grails

any .properties files put in grails-app/i18n can be used to store internationalized text.

for example, grails-app/i18n/foobar.properties

the internationalized text can be accessed in the view using

grails configuration file

To access a key in Config.groovy, grailsApplication.config.key

extracting html form unicode data

tomcat has problems with extracting unicode data (chinese for example) from submitted form. The form must be method="post". method="get" will not work in tomcat but works in jetty