Hi all folks! I'm trying to detect a change of value in self created object. This object contains presence info from the diferent domo devices in home (Fibaro FGMS-001) via zwave. I set the PRES object global every 1s with the values of presence (0:no presence, 100:presence). In other flow, with…

Or you could use RED.util.compareObjects, which the NR developers have been kind enough to make available .

This will be because NodeJS is a pass by reference language, so unless you explicitly make a deep copy of the PRESAnt object, you will be storing and updating the same original object in both areas of the context all the time.

As @hardillb said you are comparing references so they will never be equal. You will have to compare properties. If you are just looking for a change in PRES.presence you could use; if (PRES.presence != PRESAnt.presence) If you wish to compare many properties you will have to use an Object compar…

On continuation from the example by @Buckskin : You could employ lodash.isMatch Link here . Add the module in a function node, call it say LD, you can then do LD.isMatch(object, source) in your function node. isMatch returns a boolean, based on Key and Value. it takes away the heavy lifting, one t…

And if you use the Monaco editor, you will get built in help via auto completion... [jTS5iprIZY]

[image] drmibell: Or you could use RED.util.compareObjects , which the NR developers have been kind enough to make available You could have of course, if you had thought to look :blush: Does this function check recursively as it doesn't say?

[image] Buckskin: Does this function check recursively as it doesn't say? Not terribly hard to test... var o1 = { p1: "hello", a1: [1, 2, 3], deep1: { x: 1, y: 2, z: 3, s: "substring1", deep2: { deep3: "i am deep" } } } var o2 = { …

Thank you all folks!! Using RED.util.compareObjects work perfect. As I said, I want to compare two objects, one is dinamically written depending of presence sensor readings, the other object initialized (ON START). When objects are different, I want to make a MariaDB INSERT in a table. If it's di…

Add some global.warn() statements in the function to work out what is going on. However there are all sorts of traps to fall into when referencing objects in global memory, as the global will actually hold effectively a pointer to an object, not the actual object. Therefore if you change an object…

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Detecting global/flow object change

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E1cid 25 September 2021 08:17 2

Hi @Steve-Mcl posted a function to monitor context variables. you might want to read it, Lighting controller ideas - #19 by Steve-Mcl

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Detecting global/flow object change

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