I had these BASIC(TM) flavored procedures in stock:
text.aia (18.0 KB)
Those were written before we had the JOIN WITH SEPARATOR block, which could probably be used with the SPLIT AT '' block to make a shorter version.
P.S. These blocks can be dragged directly into your Blocks Editor workspace.
See A way to group projects by theme - #10 by ABG
for a demo.