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How do I clear a variable?

Very sorry if this has been asked before, but I couldn't find an answer.

How do I set a variable to nothing/nil/null/none etc?

Scenario: I set a variable on an actor when it collides with another actor, I want to clear that variable once it's done colliding.


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asked Apr 20 '14 at 05:07 PM in Blueprint Scripting

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3 answers: sort voted first

You can try to set the variable without an input parameter ?

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answered Apr 20 '14 at 05:19 PM

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avatar image AH_Rob Apr 20 '14 at 05:33 PM

haha, yep, that was it. Simpler than I thought!

avatar image axelZellalex Jun 11 '14 at 09:49 PM

hey guys this didnt work for me im calling Set variable, and passing nothing but it wont work... am i missing something ?

avatar image Steve Allison STAFF Jun 11 '14 at 10:14 PM

What type of variable are using?

avatar image axelZellalex Jun 13 '14 at 07:04 PM

im trying to set a reference to a Volume to None

avatar image samnater Jul 10 '16 at 08:55 PM

Worked for me! Intuitively intuitive

avatar image nathan.s.giroux Aug 06 '16 at 12:34 AM

Precision: you need to connect an empty 'make array' node to the set array variable

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This is an old thread but since there must still be some people here looking for answers, there is a workaround for this.

I'm guessing the problem lies with Actor references or something along those lines. The first answer from this thread was partly correct. When trying to clear a reference, you should set the variable without an input. This does clear the variable. But not entirely. There are still some traces left, for example the coordinates get reset to 0, 0,0.

To counter this, make a branch, type "==" and get the Equal(Object). Leave the select asset clear and the branch should be able to tell if the variable is in fact empty or not.

Good luck guys, this worked for me, hopefully for you guys too!

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answered Jul 17 '18 at 08:39 PM

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avatar image somethingstarted Dec 30 '18 at 09:48 PM

whoa. that's a really friggen good idea!

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Have one volume variable you use to store your volume. Then have another volume variable that is never set to anything. Us the second variable to set the first variable to None.

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answered Jun 13 '14 at 11:28 PM

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avatar image axelZellalex Jun 14 '14 at 09:11 AM

that doesnt sound very good should i raise a request to have a None variable?

avatar image flim Feb 15 '16 at 03:20 PM

I would like to know how to clear a reference variable too.

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