# Integer Array Tags

**URL:** <https://forum.inductiveautomation.com/t/integer-array-tags/59789>\
**Category:** Ignition\
**Created:** [May 19, 2022, 3:08pm UTC](https://forum.inductiveautomation.com/t/integer-array-tags/59789 "2022-05-19T15:08:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dion.botha](https://avatars.discourse-cdn.com/v4/letter/d/46a35a/32.png) [@dion.botha](https://forum.inductiveautomation.com/u/dion.botha)\
**Post date:** [May 19, 2022, 3:08pm UTC](https://forum.inductiveautomation.com/t/integer-array-tags/59789/1 "2022-05-19T15:08:01Z")

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Hi All,

I have 2 memory tags for a ASRS system. One is of all the container ids and one is of all the container ids that are empty. I would like another memory tag that will give me all the container ids that are not empty. I could do it with an expression tag + runScript but thought I would ask the group if there is a more elegant way I can do this (perhaps I can do it with other expression functions?).

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [May 19, 2022, 3:14pm UTC](https://forum.inductiveautomation.com/t/integer-array-tags/59789/2 "2022-05-19T15:14:30Z")

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Sounds like the source of truth ought to be a dataset tag w/ two columns, the latter a boolean indicating “Empty”. Empty/Non-empty lists can be easily derived from that. (Via `runScript()`, or perhaps my `view()` expression function.)