# A single value that acts like a vector?

**URL:** <https://discourse.julialang.org/t/a-single-value-that-acts-like-a-vector/13859>\
**Category:** General Usage\
**Created:** [August 22, 2018, 12:10am UTC](https://discourse.julialang.org/t/a-single-value-that-acts-like-a-vector/13859 "2018-08-22T00:10:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pdeffebach](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pdeffebach/32/10320_2.png) [@pdeffebach](https://discourse.julialang.org/u/pdeffebach)\
**Post date:** [August 22, 2018, 12:10am UTC](https://discourse.julialang.org/t/a-single-value-that-acts-like-a-vector/13859/1 "2018-08-22T00:10:22Z")

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I am pretty sure this is a common type to use, but what is the name of something like

```julia
fill(5.0, 100)

```

where the array itself is just 5 pointers to the same place memory? Something that acts like a vector, but doesn’t allocate like one.

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**Author:** ![vchuravy](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/vchuravy/32/8_2.png) [@vchuravy](https://discourse.julialang.org/u/vchuravy)\
**Post date:** [August 22, 2018, 12:23am UTC](https://discourse.julialang.org/t/a-single-value-that-acts-like-a-vector/13859/2 "2018-08-22T00:23:22Z")

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Do you mean something like [https://github.com/JuliaArrays/FillArrays.jl](https://github.com/JuliaArrays/FillArrays.jl)?

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**Author:** ![pdeffebach](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pdeffebach/32/10320_2.png) [@pdeffebach](https://discourse.julialang.org/u/pdeffebach)\
**Post date:** [August 22, 2018, 12:25am UTC](https://discourse.julialang.org/t/a-single-value-that-acts-like-a-vector/13859/3 "2018-08-22T00:25:07Z")

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Thank you!