Ignition Perspective Combine Array Properties

Ignition
,
1

I have 3 array properties of varying length but all of the elements inside are of the same type. How do I combine all 3 into 1 large array property of 16 length?

image
image759×157 13.8 KB

2

I would use my Integration Toolkit's flatten() function, like so:

flatten(
	asList(
		{view.custom.CUB_Instances},
		{view.custom.PDC_Instances},
		{view.custom.USS_Instances}
	)
)
1 Like
3

Would this work if I have arrays inside of arrays?

4

It isn't recursive. The flatten() function converts a list-of-lists into a list, without going deeper.

Only jython can handle recursion.

5

I'm pretty sure the script transform to do this would literally just be:

return self.custom.CUB_Instances + self.custom.PDC_Instances + self.custom.USS_Instances

At least, I think that would work.

I wonder if it's worth overloading the expression language + operator to do concatenation of structures like this, only for document/JSON-like things. Probably not worth the risk of confusion, but maybe...

2 Likes
6

Seems an elegant solution. I like elegant solutions.

7

Late response, but is there a way to combine arrays via expression language rather than transforms?

8

Yes, if you install my Integration Toolkit. The asPairs() function will blindly concatenate arrays (even if they aren't lists of pairs).