# \#data-structures **URL:** https://forums.unrealengine.com/tag/data-structures/2333.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Data Trees and Dinosaurs (Help/Discussion)](https://forums.unrealengine.com/t/data-trees-and-dinosaurs-help-discussion/1904722)
**Author:** [@uwuziel](https://forums.unrealengine.com/u/uwuziel)\ **Replies:** 5\ **Last updated:** [June 17, 2024, 6:45pm UTC](https://forums.unrealengine.com/t/data-trees-and-dinosaurs-help-discussion/1904722 "2024-06-17T18:45:39Z")
I’m working on a Paleo-encyclopedia app. I have a good start and can pull the data I need from a Google Sheet and put it all in an array. I’m getting to the part where I want to implement search and filter functions. On … --- ## [5.3 - Data Table/Structure - Editing this value in structure's defaults is not allowed](https://forums.unrealengine.com/t/5-3-data-table-structure-editing-this-value-in-structures-defaults-is-not-allowed/1331198)
**Author:** [@WesLee1991](https://forums.unrealengine.com/u/WesLee1991)\ **Replies:** 1\ **Last updated:** [October 13, 2023, 9:04am UTC](https://forums.unrealengine.com/t/5-3-data-table-structure-editing-this-value-in-structures-defaults-is-not-allowed/1331198 "2023-10-13T09:04:51Z")
Hiya, I am trying to set up a data table for my game, however I am running into a problem with one of the values - it is intended to be a child of the character type however inside the DT I am seeing the value drop down … --- ## [Nested Structures](https://forums.unrealengine.com/t/nested-structures/1170037)
**Author:** [@T4l\_R](https://forums.unrealengine.com/u/T4l_R)\ **Replies:** 2\ **Last updated:** [May 18, 2023, 5:17pm UTC](https://forums.unrealengine.com/t/nested-structures/1170037 "2023-05-18T17:17:27Z")
Hi all, Having an issue here and I’ve reached a dead end: I want to be able to save and load a complex array. The array type is an object I created that include within it an array of himself (object A contains an array… --- ## [Building inventory, data structure related question.](https://forums.unrealengine.com/t/building-inventory-data-structure-related-question/280580)
**Author:** [@anonymous\_user\_c4a292f1](https://forums.unrealengine.com/u/anonymous_user_c4a292f1)\ **Replies:** 1\ **Last updated:** [February 26, 2021, 9:22pm UTC](https://forums.unrealengine.com/t/building-inventory-data-structure-related-question/280580 "2021-02-26T21:22:10Z")
Hi, I am starting to work on an inventory system using blueprints only. I plan to have a number of interactive objects in the scene, including collectable items as well as other interactive objects such as simple portal… --- ## [Best way to store/manage large number of actions for AI to chose from? (Are tables possible?)](https://forums.unrealengine.com/t/best-way-to-store-manage-large-number-of-actions-for-ai-to-chose-from-are-tables-possible/473299)
**Author:** [@Gedinixan](https://forums.unrealengine.com/u/Gedinixan)\ **Replies:** 0\ **Last updated:** [October 22, 2020, 7:56am UTC](https://forums.unrealengine.com/t/best-way-to-store-manage-large-number-of-actions-for-ai-to-chose-from-are-tables-possible/473299 "2020-10-22T07:56:03Z")
I want to build an AI character with a lot of different actions/attacks it can choose from depending on its environment (for example distance to target and angle to target). The intuitive way for me to do this would be s… --- ## [How does the Unreal compiler handle references to container structs in memory?](https://forums.unrealengine.com/t/how-does-the-unreal-compiler-handle-references-to-container-structs-in-memory/463200)
**Author:** [@Goonix\_1](https://forums.unrealengine.com/u/Goonix_1)\ **Replies:** 0\ **Last updated:** [April 2, 2020, 11:08am UTC](https://forums.unrealengine.com/t/how-does-the-unreal-compiler-handle-references-to-container-structs-in-memory/463200 "2020-04-02T11:08:37Z")
I know this is a broad one, but let me explain. I’ve been trying to clean up my code and make it easier to write. I thought I’d use some references to some bigger structs I’ve been using. In my code I have a reference … --- ## [Niagara Write to Texture or Data Structure](https://forums.unrealengine.com/t/niagara-write-to-texture-or-data-structure/459156)
**Author:** [@anonymous\_user\_a9f49d8b](https://forums.unrealengine.com/u/anonymous_user_a9f49d8b)\ **Replies:** 0\ **Last updated:** [December 5, 2019, 10:17am UTC](https://forums.unrealengine.com/t/niagara-write-to-texture-or-data-structure/459156 "2019-12-05T10:17:59Z")
In the Niagara system, is there any way to write to a texture? I want to write the position of each particle into a texture. So the 2d grayscale texture has its intensity as the number of particles in the pixel. Or, i… --- ## [Nested Maps and Sets with structs crash the editor in 4.23 (issue UE-81308)](https://forums.unrealengine.com/t/nested-maps-and-sets-with-structs-crash-the-editor-in-4-23-issue-ue-81308/456980)
**Author:** [@Brylonian](https://forums.unrealengine.com/u/Brylonian)\ **Replies:** 4\ **Last updated:** [October 23, 2019, 2:32pm UTC](https://forums.unrealengine.com/t/nested-maps-and-sets-with-structs-crash-the-editor-in-4-23-issue-ue-81308/456980 "2019-10-23T14:32:40Z")
Just lending my voice to this issue: Unreal Engine Issues and Bug Tracker (UE-81308) We recently updated our project to 4.23 and everything crashes. Specifically, as with issue UE-81308, trying to open, or edit blueprin… --- ## [What kind of a tree does a HISM build](https://forums.unrealengine.com/t/what-kind-of-a-tree-does-a-hism-build/450326)
**Author:** [@GlassBeaver](https://forums.unrealengine.com/u/GlassBeaver)\ **Replies:** 1\ **Last updated:** [July 19, 2019, 9:15am UTC](https://forums.unrealengine.com/t/what-kind-of-a-tree-does-a-hism-build/450326 "2019-07-19T09:15:58Z")
A HISM builds a tree representation of its instances every so often via FClusterBuilder::BuildTree() What I’d like to know is what kind of a tree this is: a k-d tree, an R-tree, an octree… I’ve been looking at BuildTre… --- ## [How do you instantiate a new UObject?](https://forums.unrealengine.com/t/how-do-you-instantiate-a-new-uobject/350541)
**Author:** [@HInoue](https://forums.unrealengine.com/u/HInoue)\ **Replies:** 4\ **Last updated:** [July 17, 2019, 11:37am UTC](https://forums.unrealengine.com/t/how-do-you-instantiate-a-new-uobject/350541 "2019-07-17T11:37:26Z")
Based on the awesome advice in UDataAsset vs Blueprintable UObject - C++ - Unreal Engine Forums I’m using a child of UDataAsset to store each kind of quest objective in my system: UCLASS(BlueprintType) class UQuestObjec… --- ## [Store level data in XML format](https://forums.unrealengine.com/t/store-level-data-in-xml-format/322469)
**Author:** [@drakosvlad\_1](https://forums.unrealengine.com/u/drakosvlad_1)\ **Replies:** 2\ **Last updated:** [June 5, 2018, 8:19pm UTC](https://forums.unrealengine.com/t/store-level-data-in-xml-format/322469 "2018-06-05T20:19:15Z")
Hello! I am creating my 3d puzzle game and I need to store levels. I tried to use DataAsset, but I found it very uncomfortable to add new levels. I decided to use XML file to store them because it s quite simple to under… --- ## [\[Data Structures\] Sorting Data structs](https://forums.unrealengine.com/t/data-structures-sorting-data-structs/426473)
**Author:** [@RyzonPT](https://forums.unrealengine.com/u/RyzonPT)\ **Replies:** 0\ **Last updated:** [June 2, 2018, 3:28am UTC](https://forums.unrealengine.com/t/data-structures-sorting-data-structs/426473 "2018-06-02T03:28:53Z")
Hello every1. Well i 've been working with UE4 Multiplayer for the past year and it was really amazing. Now i came to a problem. I want to implement an optimized data struct for some querys. Lets supose the data would … --- ## [Menu and Data Driven Game Help](https://forums.unrealengine.com/t/menu-and-data-driven-game-help/420851)
**Author:** [@cveedub](https://forums.unrealengine.com/u/cveedub)\ **Replies:** 0\ **Last updated:** [March 25, 2018, 6:02pm UTC](https://forums.unrealengine.com/t/menu-and-data-driven-game-help/420851 "2018-03-25T18:02:14Z")
Greetings! I’m trying to build a management sim game but I get stuck on things because I can’t dynamically write data to the tables and I’m not really sure how to proceed. An example would be a Hire tab that generates 5… --- ## [Export/Save Data into Data Table/Variable/File?](https://forums.unrealengine.com/t/export-save-data-into-data-table-variable-file/410304)
**Author:** [@devektiv](https://forums.unrealengine.com/u/devektiv)\ **Replies:** 1\ **Last updated:** [November 22, 2017, 12:39pm UTC](https://forums.unrealengine.com/t/export-save-data-into-data-table-variable-file/410304 "2017-11-22T12:39:37Z")
Structs. Look into structs and save game object. --- ## [Data Structures (Maps and Sets)](https://forums.unrealengine.com/t/data-structures-maps-and-sets/376523)
**Author:** [@CyanBalloon](https://forums.unrealengine.com/u/CyanBalloon)\ **Replies:** 8\ **Last updated:** [November 23, 2016, 3:06am UTC](https://forums.unrealengine.com/t/data-structures-maps-and-sets/376523 "2016-11-23T03:06:27Z")
Hi, Anyone actually knows how to define Maps and Sets in Blueprint Scripting? Is it actually possible, or is it C++ only? I really can’t seem to find any documentation on this other than the C++ TMap data structure. So… --- ## [Not sure how to store a tree like structure](https://forums.unrealengine.com/t/not-sure-how-to-store-a-tree-like-structure/365812)
**Author:** [@thesonglessbird](https://forums.unrealengine.com/u/thesonglessbird)\ **Replies:** 1\ **Last updated:** [August 1, 2016, 6:16pm UTC](https://forums.unrealengine.com/t/not-sure-how-to-store-a-tree-like-structure/365812 "2016-08-01T18:16:02Z")
I come from a Javascript background and I’m new to C++ and Unreal Engine so I may well be approaching this in the wrong way but my problem is as follows: I have a class that’s loading in a number of static meshes and s… --- ## [\[Feature Request\] Alternate the background when editing DataAsset arrays](https://forums.unrealengine.com/t/feature-request-alternate-the-background-when-editing-dataasset-arrays/363621)
**Author:** [@anonymous\_user\_52ca2a09](https://forums.unrealengine.com/u/anonymous_user_52ca2a09)\ **Replies:** 0\ **Last updated:** [July 11, 2016, 10:23am UTC](https://forums.unrealengine.com/t/feature-request-alternate-the-background-when-editing-dataasset-arrays/363621 "2016-07-11T10:23:06Z")
Hopefully a fairly simple request, but something that has been bugging me for a long time. When editing DataAsset it’s really difficult to spot the break between array elements. A really simple way to make it easier wou… --- ## [How to: Different functions modifies one data structure](https://forums.unrealengine.com/t/how-to-different-functions-modifies-one-data-structure/349639)
**Author:** [@Raidfire.Net](https://forums.unrealengine.com/u/Raidfire.Net)\ **Replies:** 2\ **Last updated:** [March 5, 2016, 11:28pm UTC](https://forums.unrealengine.com/t/how-to-different-functions-modifies-one-data-structure/349639 "2016-03-05T23:28:21Z")
Hi, i have made different functions and they modifies one data structure. Unfortunatey the data structure does not remain solid. How do you work in that case? What is your solution for keeping data structures solid w… --- ## [Structure does not display SkeletalMesh type as editable](https://forums.unrealengine.com/t/structure-does-not-display-skeletalmesh-type-as-editable/302431)
**Author:** [@kzoink](https://forums.unrealengine.com/u/kzoink)\ **Replies:** 5\ **Last updated:** [February 17, 2016, 4:19pm UTC](https://forums.unrealengine.com/t/structure-does-not-display-skeletalmesh-type-as-editable/302431 "2016-02-17T16:19:46Z")
I’m trying to create a variable of type SkeletalMesh in a user-defined Structure. Unlike other types, if I mark this type of variable as editable, it does not show under the Default Values section and is thus not editabl… --- ## [Im a bit confused with blueprints for data only](https://forums.unrealengine.com/t/im-a-bit-confused-with-blueprints-for-data-only/339564)
**Author:** [@anonymous\_user\_ed76438d](https://forums.unrealengine.com/u/anonymous_user_ed76438d)\ **Replies:** 2\ **Last updated:** [November 25, 2015, 6:18pm UTC](https://forums.unrealengine.com/t/im-a-bit-confused-with-blueprints-for-data-only/339564 "2015-11-25T18:18:09Z")
So im a bit confused. Im have made games before but not 3D games. I used AS3 (Flash) php and Java. I know nearly nothing about c++. My team mate also knows about programming but is not at all in c++. So we began our gam… --- ## [\[4.8.3\] Importing csv data into Name property cuts off strings](https://forums.unrealengine.com/t/4-8-3-importing-csv-data-into-name-property-cuts-off-strings/329858)
**Author:** [@anonymous\_user\_359f4d3c](https://forums.unrealengine.com/u/anonymous_user_359f4d3c)\ **Replies:** 5\ **Last updated:** [September 7, 2015, 2:37pm UTC](https://forums.unrealengine.com/t/4-8-3-importing-csv-data-into-name-property-cuts-off-strings/329858 "2015-09-07T14:37:29Z")
I’ve set up a small struct containing some values pertaining to a combat unit, and created a Data Table based on this struct by importing the matching csv file. For some reason, string values are treated differently if … --- ## [Structures in C++](https://forums.unrealengine.com/t/structures-in-c/305853)
**Author:** [@3HMonkey](https://forums.unrealengine.com/u/3HMonkey)\ **Replies:** 11\ **Last updated:** [July 25, 2015, 8:51pm UTC](https://forums.unrealengine.com/t/structures-in-c/305853 "2015-07-25T20:51:04Z")
Hello guys, I have a question… How I will be able to create a struct like a blueprint structure in c++ ? I cannot find a working documentation about this topic. I am using 4.7 preview 4. Are there also any non outdated… --- ## [How to lazy point an animation sequence in a data table?](https://forums.unrealengine.com/t/how-to-lazy-point-an-animation-sequence-in-a-data-table/311496)
**Author:** [@douglaslassance](https://forums.unrealengine.com/u/douglaslassance)\ **Replies:** 1\ **Last updated:** [March 24, 2015, 7:59am UTC](https://forums.unrealengine.com/t/how-to-lazy-point-an-animation-sequence-in-a-data-table/311496 "2015-03-24T07:59:24Z")
This page describes how to lazy point a texture inside a data table, I am trying to do the same with an animation clip. Any idea how this can be achieved? --- ## [A simple blueprint questions](https://forums.unrealengine.com/t/a-simple-blueprint-questions/293160)
**Author:** [@CriticalSections](https://forums.unrealengine.com/u/CriticalSections)\ **Replies:** 2\ **Last updated:** [September 8, 2014, 3:09am UTC](https://forums.unrealengine.com/t/a-simple-blueprint-questions/293160 "2014-09-08T03:09:09Z")
Do I need a data structure and algorithm to use the blueprint?