Concat array elements into a string

Hi,
This seems straightforward but I can't seem to figure it out.
Basically, I have a table of elements and I want to string them all
together into a single text variable.

Here is the pseudocode

txtvar PIC X(30)
arrayvar [10]
do varying index from 1 by 1
txtvar = Rtrim(txtvar) || arrayvar(index) where || represents a
concatenation operator
until index = 10

I tried something like this in COBOL

perform varying ws-counter from 1 by 1 until ws-counter = 10
string txtvar ',' arrayvar(ws-counter)
delimited by size into txtvar
end-perform

But I just got spaces in txtvar at the end of it, presumably because I
don't have a trim function that I can use in COBOL (or is there one
that I just don't know of?)

I searched this forum and the web too on things like
"string array elements together" and didn't find anything useful.

Any ideas?

.

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