Nested List: programmatically add a list to another list

[Deininger, Andreas]

Hi all,

I'm new to Groovy and ran into the following issue:

<example>
def myList = [ "A", ["B", "C", "D"], "E"];

def flatList = [ "A" ]
flatList += ["B", "C", "D"]
flatList += "E";

myList.each {
        print "$it ";
}
println ""
flatList.each {
    print "$it ";
}
</example>

This gives:
A ["B", "C", "D"] E  
A B C D E

In the second case, I want to get A ["B", "C", "D"] E as result also.
Is there any way to programmatically add a list to another list, producing a nested list?
While using flatList += ["B", "C", "D"], it obvioulsy flattens the list, which is not what I want.

Thanks in advance

Regards
Andreas

PS: I'm using Groovy Version 1.6.3 with JVM 1.6.0_05 on Windows

[Fred Carter]

List l = ["a"]

l << ["b", "c", "d"]

l << "e"

l.each { print "${it} " }

println "done"

produces
    a ["b", "c", "d"] e done
in groovy console

Thus quoth Deininger, Andreas (~ 6/3/2009 8:45 AM ~)...

Hi all,

I'm new to Groovy and ran into the following issue:

<example>
def myList = [ "A", ["B", "C", "D"], "E"];

def flatList = [ "A" ]
flatList += ["B", "C", "D"]
flatList += "E";

myList.each {
	print "$it ";
}
println ""
flatList.each {
    print "$it ";
}
</example>

This gives:
A ["B", "C", "D"] E  
A B C D E

In the second case, I want to get A ["B", "C", "D"] E as result also.
Is there any way to programmatically add a list to another list, producing a nested list?
While using flatList += ["B", "C", "D"], it obvioulsy flattens the list, which is not what I want.

Thanks in advance

Regards
Andreas

PS: I'm using Groovy Version 1.6.3 with JVM 1.6.0_05 on Windows