# \[FEATURE\] len() expression for arrays

**URL:** <https://forum.inductiveautomation.com/t/feature-len-expression-for-arrays/26784>\
**Category:** Ignition Early Access\
**Created:** [July 23, 2019, 8:11am UTC](https://forum.inductiveautomation.com/t/feature-len-expression-for-arrays/26784 "2019-07-23T08:11:33Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\
**Post date:** [July 23, 2019, 8:11am UTC](https://forum.inductiveautomation.com/t/feature-len-expression-for-arrays/26784/1 "2019-07-23T08:11:33Z")

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The `len()` expression works for datasets, but not for arrays. It would be great if this expression would accept arrays as parameter in perspective bindings.

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**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\
**Post date:** [July 23, 2019, 12:49pm UTC](https://forum.inductiveautomation.com/t/feature-len-expression-for-arrays/26784/2 "2019-07-23T12:49:20Z")

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You can work around it by using a script transform.

 ![2019-07-23_8-48-35](https://us1.discourse-cdn.com/inductiveautomation/original/2X/0/0cf2c44ee785e20e0a3c12eaaf1c236f9ec4330f.jpeg)

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**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\
**Post date:** [July 23, 2019, 1:33pm UTC](https://forum.inductiveautomation.com/t/feature-len-expression-for-arrays/26784/3 "2019-07-23T13:33:44Z")

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Thanks for the tip. That is exactly what i’m doing but i think it would be more elegant if the expression could handle this without a transform.

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**Author:** ![KathyApplebaum](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kathyapplebaum/32/7261_2.png) [@KathyApplebaum](https://forum.inductiveautomation.com/u/KathyApplebaum)\
**Post date:** [July 23, 2019, 1:41pm UTC](https://forum.inductiveautomation.com/t/feature-len-expression-for-arrays/26784/4 "2019-07-23T13:41:09Z")

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Keep your eyes on 8.0.4 – you may find a few goodies for arrays and document tags. 🤐