# Type Sudoku (test if object is a struct)

**URL:** <https://discourse.julialang.org/t/type-sudoku-test-if-object-is-a-struct/66139>\
**Category:** Performance\
**Tags:** type, dispatch\
**Created:** [August 10, 2021, 2:51pm UTC](https://discourse.julialang.org/t/type-sudoku-test-if-object-is-a-struct/66139 "2021-08-10T14:51:11Z")\
**Posts on this page:** 1\
**Showing post:** 21

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**Author:** ![Bardo](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/bardo/32/21601_2.png) [@Bardo](https://discourse.julialang.org/u/Bardo)\
**Post date:** [June 8, 2022, 9:25am UTC](https://discourse.julialang.org/t/type-sudoku-test-if-object-is-a-struct/66139/21 "2022-06-08T09:25:58Z")

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Hi, unfortunately there are much more positive tests than possibly expected:  
[Unexpected : isstructtype( Vector{Float64}) =\> true - General Usage - JuliaLang](https://discourse.julialang.org/t/unexpected-isstructtype-vector-float64-true/79283/4)  
As one of my colleagues says: “Inspect what you expect”.

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