Blueprint array resize node not persistent

Development Programming & Scripting Blueprint
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1

Repro Steps:

  • add an empty array variable to a blueprint
  • in the BeginPlay, resize the array using the array resize node
  • break in Tick and view the array, the size will still be zero

Tried with, public, private, editable, and non-editable array variable types.
To be clear, the arrays did resize in the BeginPlay.

EDIT: I also tried creating a helper function that just added members to the array and had the same results. Is the array variable type just not dynamic?

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This is my use case. I’m guessing that either the array is not dynamic or the array used in the function is just a local copy.

2

What do you mean? This just prints 10, as expected:

214391-array.png
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What do you mean by break, are you talking about structs?

To be clear, the arrays did resize in
the BeginPlay.

So which one is it?

3

Hi. I meant placing a breakpoint.

4

You put the break where, in Tick? As default, actors tick before BeginPlay:

214401-capture.png

5

Yeah, that was my initial thought, but it is unchecked. I’ve also been checking more than the first Tick.

6

One difference I notice between your test and mine is that you use one variable node for both functions, though I would be surprised if that made a difference. EDIT: Yeah, it doesn’t.

7

I’m a doofus. Just don’t accidentally clear your array …

8

Yeah, that sucks, ouch :wink: