I was wondering if there is any neat way to write new line into the file from Groovy. I have the following script:
new File("out.txt").withWriter{ writer ->
for(line in 0..100) {
writer << "$line"
}
}
I could use writer << "$line\n" or writer.println("$line"), but I was wondring if there is any way to use << operator to append the new line for me.
You could use meta programming to create that functionality. An easy solution to change the behaviour of the << operator would be to use a custom category.
Example:
class LeftShiftNewlineCategory {
static Writer leftShift(Writer self, Object value) {
self.append value + "\n"
}
}
use(LeftShiftNewlineCategory) {
new File('test.txt').withWriter { out ->
out << "test"
out << "test2"
}
}
More about categories here: http://docs.codehaus.org/display/GROOVY/Groovy+Categories