aspose file tools*
The moose likes Groovy and the fly likes strange grammar feature Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Languages » Groovy
Bookmark "strange grammar feature" Watch "strange grammar feature" New topic
Author

strange grammar feature

bernard amadeus
Greenhorn

Joined: May 15, 2009
Posts: 21
Hello
(I'm a Groovy newbie)
by reading a groovy grammar (http://groovy.codehaus.org/jsr/spec/GroovyRecognizer.html#argument)
I do not understand the "argument" production
apparentlty there may be something like "*:" as a label .... seen nothing on the web to explain the meaning of that ...
any hint?
thanks
sergio ramirez
Greenhorn

Joined: Aug 28, 2011
Posts: 4

Hello Bernard!

Nice question!, *. operator is used to spread all elements in a list...

assert ['cat', 'elephant']*.size() == [3, 8]

while *: is used to spread or combine maps, so you could do something like this:

def argMap = [b:2, c:3, d:4]

fancyMethod(a:1, *:argMap) // You can see this complies the "argument" production in the groovy grammar

You could also see this link http://marc.info/?l=groovy-user&m=126217908601838

Hope this helps!
Regards,
Serch
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: strange grammar feature