Problem: small screen. Can only display 1 message. Big size of messages to queue I want the node to store/queue messages. If it gets a next command, it shows the next message. If it gets a previous command, it shows the previous message. Wipe wipes the current message. Wipe ALL wipes all me…

[image] Trying_to_learn: This never gets above 1 What do you see if you add a warn to show the length before the push?

It is 0. Me suspects I am constantly re-making the array, rather than checking if it exists - as per the code in the FIFO subflow. Thanks. Stupid me didn't think of that. Ok, not that easy. :frowning: If I replace the single push with this: queue_array.push("Message 1"); queue_array.push("Mes…

[image] Trying_to_learn: Me suspects I am constantly re-making the array Methinks thee is right.

So when I add the code: var queue_array = flow.get("queue") // I'm guessing this checks if the array exists. if (!Array.isArray(queue_array)) { queue_array = []; } That would only happen if it didn't exist. (As per the FIFO flow) That is all I can resolve as the test to see if it is an …

googling " javascript array pop " should be within you by now... but yes I see you have found unshift... push and pop work on the end of the array and unshift and shift work on the front. (and delete works anywhere)

@dceejay , yeah, I've found the commands. The order (queueing) I put them in the array is a bit academic to me at this stage. The problem is the detecting the existence of the array. if (!Array.isArray(queue)) Seems to be a sticking point. I added code so if it sets up the array, it node.warn( ) …

Well you first should try to get it from context... which I think you are doing..... var queue_array = flow.get("queue") // I'm guessing this checks if the array exists. but then at the end you have to save it back to context... otherwise next time it won't be there...

Woo - hoo! I think that was lucky of me as I just worked that out - I think. I added this to the end of the block: flow.set('queue',queue_array); But the output I am seeing is not understandable. Oh, after looking a bit harder, I think I get it. I'll apply it to the other node I am actually us…

[image] Trying_to_learn: The queue.pop( ) isn't covered in the link supplied about JS arrays. The only pop is for JS popup which is a popup message. Pop is covered in the link that I gave. Just after map and before push. [image] Trying_to_learn: This is what is telling me the array isn't…

D'oh! Yeah. Silly me. I really must make idiots look smart.

Message queue node that can be indexed

General

Trying_to_learn 20 January 2020 11:36 31

I've posted the working flow here if you want to look at it and have a look at what I did.

Working flow

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Message queue node that can be indexed

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