Somewhere I caught that "change" node has regular expression capabilities but not sure where that is documented, if it's true. At the moment I need to append and prepend to messages. I am currently doing this in JS in the function node, but that is a slower performance way (as I understand it) than using more efficient built in nodes like change.
Where can I find documentation on advanced string manipulation available - presumably in the change node? Meanwhile if you can provide answer to simple appending and prepending literal substring to msg.payload that would also be appreciated!