# Immutable Data Structures
**URL:** https://discourse.julialang.org/t/immutable-data-structures/17696
**Category:** General Usage
**Created:** [November 19, 2018, 3:16am UTC](https://discourse.julialang.org/t/immutable-data-structures/17696 "2018-11-19T03:16:40Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Qiyamah](https://discourse.julialang.org/u/Qiyamah)
#### Post date: [November 19, 2018, 3:16am UTC](https://discourse.julialang.org/t/immutable-data-structures/17696/1 "2018-11-19T03:16:40Z")
Is there a package which provides this?
I don’t want to use push!, I would like to concat and so on
Thanks
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### Author:  [@tkoolen](https://discourse.julialang.org/u/tkoolen)
#### Post date: [November 19, 2018, 3:52am UTC](https://discourse.julialang.org/t/immutable-data-structures/17696/2 "2018-11-19T03:52:13Z")
Just [GitHub - JuliaArrays/StaticArrays.jl: Statically sized arrays for Julia](https://github.com/JuliaArrays/StaticArrays.jl/)?
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### Author:  [@rdeits](https://discourse.julialang.org/u/rdeits)
#### Post date: [November 19, 2018, 3:52am UTC](https://discourse.julialang.org/t/immutable-data-structures/17696/3 "2018-11-19T03:52:26Z")
Perhaps [GitHub - JuliaCollections/FunctionalCollections.jl: Functional and persistent data structures for Julia](https://github.com/JuliaCollections/FunctionalCollections.jl) is what you’re looking for?
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### Author:  [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)
#### Post date: [November 19, 2018, 6:32am UTC](https://discourse.julialang.org/t/immutable-data-structures/17696/4 "2018-11-19T06:32:01Z")
> [@Qiyamah](#):
>
> I don’t want to use push!, I would like to concat and so on
You can use functional operations on mutable structures, too. If you don’t want to use `push!`, just don’t.