Hello everyone, Im using Function node a lot. But I am seeing irratic behaviour of node red. Atleast thats how I percieve it. Might be due to a lack of understading :slight_smile: var nr_corr = global.get('NightReduction_current_value',"file"); msg.payload = nr_corr; return msg; Debug node after…

The number 0 is considered false, so if you you fetch 0 the or would kick in, as it is considered false.. Therefore it defaults to 10. You will need to use if else conditional to set a default. If undefined

Maybe you need to use persistent context? https://discourse.nodered.org/t/a-guide-to-understanding-persistent-context/4115

So you are saying that every variable I have declared in global.set ("file") that might be set to the value 0 at some time, will always be showing the ||10 >> value 10 as result ?? whuuuuht? :smiley:

I am using persistent storage. But I use global variables. I work with multiple tabs. big flows. Thats why I use global instad of flow or context.

[image] edterbak: So you are saying that every variable I have declared in global.set ("file") that might be set to the value 0 at some time, will always be showing the ||10 >> value 10 as result ?? Yes, That's what i am saying. ( would have stopped at Yes but min 10 characters)

You will need to use if else conditional to set a default. If undefined OK. :face_with_spiral_eyes: I have just done this ||0 at multiple places, becasue I thought it was a better and shorter way of testing if the variable exists. hahahaha..

Thank you all for the quick reply!! Much appreciated. :slight_smile:

[image] E1cid: The number 0 is considered false, so if you you fetch 0 the or would kick in, as it is considered false.. Therefore it defaults to 10. You will need to use if else conditional to set a default. If undefined Hmm. Is that one of those non-positive undocumented features? It's a …

[image] jbudd: So we should never use context.get('variable') || default_number ? see above post

var ___test = global.get('___testvalue0')||10; msg.payload = ___test; return msg; Result = 10 var ___test = global.get('___testvalue1')||10; msg.payload = ___test; return msg; Result = 1 E1cid is 100% correct. Thank you for this clarity. @E1cid So any stored value in context/flow/global is sub…

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Global.get('')||0 inconsistent resutls (Function node)

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E1cid 1 October 2022 15:39 9

|| 0 is fine but not any other number, unless there will never be a 0.

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Global.get('')||0 inconsistent resutls (Function node)

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