Foursquare node allows for output to multiple messages, but does not modify the node's number of outputs. about node-red-web-nodes

[knolleary]

@lostinthestory the node is not expected to vary the number of outputs.

When you pass an array to node.send, each element in that array maps to an output of the node. If one of those elements in the array is itself an array of messages, each of those messages is sent to that output, one at a time.

If you look at where the 4sq node constructs what it passes to node.send in multiple messages case, you can see it builds an array of messages here, but then wraps that in array before passing to node.send here.

The net effect is that If multiple messages are required, they are all emitted one at a time from the single output.

[codymwalker]

Ah ha!
Thanks @knolleary, I didn't notice it was being passed as a double array despite staring the code staring in the face.
I was trying to use the same approach elsewhere, and could not get more than the first msg unless I added additional output nodes.