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Status Delivered
Workspace IBM i
Categories Languages - RPG
Created by Guest
Created on Oct 29, 2021

%join() to catenate strings to one string

In Java there is the method join() to catenate strings into one string including a delimiter. I would like to have a function like this.

For example
%join( '/' : 'dir' : 'subdir' : 'file.txt')
resulting in the string 'dir/subdir/file.txt'

or if you have an array myArray with variable length characters containing the values ('dir', 'subdir' , 'file.txt') then
%join( '/' : myArray)
should result in the string 'dir/subdir/file.txt'

Use Case:

%join() combined with %split() could be used to eliminate duplicate spaces or characters in a string.

If you have a field myField with the string
'' you could do this
%join(' ' : %split( myField : '.' ))
and the resulting string would be
'this is a test'

Idea priority Low
  • Guest
    Dec 1, 2022

    IBM believes that the solution for the Idea described is available for 7.4 and 7.5 with the following PTFs for new built-in functions %CONCAT and %CONCATARR:


    ILE RPG Compiler, TGTRLS(*CURRENT): 5770WDS SI81749

    7.5: << Note that this release number was corrected on 2023-01-06 -- it had been incorrectly stated as "7.3".

    ILE RPG Compiler, TGTRLS(*CURRENT): 5770WDS SI81801

    ILE RPG Compiler, TGTRLS(V7R4M0): 5770WDS SI81819

    New built-in functions %CONCAT and %CONCATARR are supported. See

    - IBM Power Systems Development

  • Guest
    Oct 11, 2022
    IBM agrees with the Idea and a solution appears to be desirable and feasible. IBM intends to provide a solution. However, IBM's plans may change and no commitment is made that a solution will be provided.

    If this Idea is implemented, new built-in functions %CONCAT and %CONCATARR will be supported. See

    - IBM Power Systems Development
  • Guest
    Nov 18, 2021

    IBM will use this request as input to planning but no commitment is made or implied. This request will be updated in the future if IBM implements it. IBM will use votes and comments from others in the community to help prioritize this request.