# Latest

**URL:** https://discourse.julialang.org/latest.md?page=114

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

**Page:** 115

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## [CUDSS adjoint factorization](https://discourse.julialang.org/t/cudss-adjoint-factorization/131841)

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**Author:** [@Gabrio\_Rizzuti](https://discourse.julialang.org/u/Gabrio_Rizzuti)\
**Replies:** 2\
**Last updated:** [September 3, 2025, 8:54pm UTC](https://discourse.julialang.org/t/cudss-adjoint-factorization/131841 "2025-09-03T20:54:13Z")

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Hello! My question is relatively straightforward. I’d like to use the LU factorization of the adjoint of a sparse matrix of type CuSparseMatrixCSR with the package CUDSS.jl, e.g. lu(A'), by only having access to lu(A). …

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## [Optimization on unit sphere?](https://discourse.julialang.org/t/optimization-on-unit-sphere/130720)

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**Author:** [@ForceBru](https://discourse.julialang.org/u/ForceBru)\
**Replies:** 12\
**Last updated:** [September 3, 2025, 6:01pm UTC](https://discourse.julialang.org/t/optimization-on-unit-sphere/130720 "2025-09-03T18:01:45Z")

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Random question about Differential Evolution: do you happen to know if there’s a variant of DE that keeps all vectors of the population on the unit sphere or on the unit simplex? My optimization problem is of the form: …

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## [Would it be possible to write LLVM in Julia?](https://discourse.julialang.org/t/would-it-be-possible-to-write-llvm-in-julia/103925)

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**Author:** [@R.T.A.M](https://discourse.julialang.org/u/R.T.A.M)\
**Replies:** 6\
**Last updated:** [September 3, 2025, 4:30pm UTC](https://discourse.julialang.org/t/would-it-be-possible-to-write-llvm-in-julia/103925 "2025-09-03T16:30:24Z")

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I was reading the Developer Documentation on Eval of Julia code and the 10,000 foot view of the whole process. I wondered if this is still up to date since there were speed ups in 1.9.3 ? I was also wondering if, Hypoth…

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## [How to annotate on heatmaps in Makie.jl](https://discourse.julialang.org/t/how-to-annotate-on-heatmaps-in-makie-jl/89506)

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**Author:** [@math\_opt](https://discourse.julialang.org/u/math_opt)\
**Replies:** 3\
**Last updated:** [September 3, 2025, 2:32pm UTC](https://discourse.julialang.org/t/how-to-annotate-on-heatmaps-in-makie-jl/89506 "2025-09-03T14:32:18Z")

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How to annotate heat maps in Makie.jl. I was going through this post and the code in the question doesn’t seem to produce the text (numbers) on the heatmap. The code is also provided below: using DataFrames using CSV …

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## [JULIA\_MAX\_NUM\_PRECOMPILE\_FILES and vscode](https://discourse.julialang.org/t/julia-max-num-precompile-files-and-vscode/132069)

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**Author:** [@rveltz](https://discourse.julialang.org/u/rveltz)\
**Replies:** 3\
**Last updated:** [September 3, 2025, 2:24pm UTC](https://discourse.julialang.org/t/julia-max-num-precompile-files-and-vscode/132069 "2025-09-03T14:24:49Z")

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Hi, I would like to increase JULIA\_MAX\_NUM\_PRECOMPILE\_FILES for my workflow. However it is inconvenient to use export JULIA\_MAX\_NUM\_PRECOMPILE\_FILES = 10 when using vscode. What is the preferred workflow in this case? …

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## [TPDE-LLVM for 10-20x faster -O1 compilation](https://discourse.julialang.org/t/tpde-llvm-for-10-20x-faster-o1-compilation/132074)

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**Author:** [@RomeoV](https://discourse.julialang.org/u/RomeoV)\
**Replies:** 2\
**Last updated:** [September 3, 2025, 2:15pm UTC](https://discourse.julialang.org/t/tpde-llvm-for-10-20x-faster-o1-compilation/132074 "2025-09-03T14:15:30Z")

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I just saw this post on hackernews, where an LLVM compiler backend (github) was posted that claims to get 10-20x compile time speedup compared to an LLVM 19 baseline. Quoting from the linked LLVM-Discourse thread: How…

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## [A question on dispatch on type parameter being UnionAll](https://discourse.julialang.org/t/a-question-on-dispatch-on-type-parameter-being-unionall/132070)

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**Author:** [@sgaure](https://discourse.julialang.org/u/sgaure)\
**Replies:** 3\
**Last updated:** [September 3, 2025, 1:26pm UTC](https://discourse.julialang.org/t/a-question-on-dispatch-on-type-parameter-being-unionall/132070 "2025-09-03T13:26:52Z")

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I’m a bit curious about the following problem, it’s not a big deal and has an easy solution, but anyway struct A{T,S} t::T s::S end struct B{V\<:A} v::Vector{V} end b1 = B(\[A(1,2), A(3,4.0)\]) # element typ…

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## [OpenModelica with Julia SCIML application](https://discourse.julialang.org/t/openmodelica-with-julia-sciml-application/132066)

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**Author:** [@Dharani\_sree\_G](https://discourse.julialang.org/u/Dharani_sree_G)\
**Replies:** 2\
**Last updated:** [September 3, 2025, 11:47am UTC](https://discourse.julialang.org/t/openmodelica-with-julia-sciml-application/132066 "2025-09-03T11:47:27Z")

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I’m working on OpenModelica with Julia for one of my SCIML application. I’m unable to display the animation of my multibody physics model\_res.mat in my Julia application. Is there any package to support this

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## [Why does \`Union{Int,...}\` in a \`Vector\` not cause allocations but \`Union{Float64,...}\` does?](https://discourse.julialang.org/t/why-does-union-int-in-a-vector-not-cause-allocations-but-union-float64-does/132067)

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**Author:** [@jules](https://discourse.julialang.org/u/jules)\
**Replies:** 8\
**Last updated:** [September 3, 2025, 11:44am UTC](https://discourse.julialang.org/t/why-does-union-int-in-a-vector-not-cause-allocations-but-union-float64-does/132067 "2025-09-03T11:44:22Z")

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I have a custom missing type which stores a symbol and a reference to an object whose type is not predetermined, so it’s an Any field. I need to store vectors of these, some values will be missing but most won’t be. Here…

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## [\[ANN\] FlexiJoins.jl: fresh take on joining datasets](https://discourse.julialang.org/t/ann-flexijoins-jl-fresh-take-on-joining-datasets/79655)

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**Author:** [@aplavin](https://discourse.julialang.org/u/aplavin)\
**Replies:** 33\
**Last updated:** [September 2, 2025, 3:10am UTC](https://discourse.julialang.org/t/ann-flexijoins-jl-fresh-take-on-joining-datasets/79655 "2025-09-02T03:10:54Z")

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FlexiJoins.jl is a fresh take on joining tabular or non-tabular datasets in Julia: Alexander Plavin / FlexiJoins.jl · GitLab. From simple joins by key, to asof joins, to merging catalogs of terrestrial or celestial co…

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## [What's the difference between Gen and Turing for probabilistic programming?](https://discourse.julialang.org/t/whats-the-difference-between-gen-and-turing-for-probabilistic-programming/36624)

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**Author:** [@sivakon](https://discourse.julialang.org/u/sivakon)\
**Replies:** 7\
**Last updated:** [September 3, 2025, 8:58am UTC](https://discourse.julialang.org/t/whats-the-difference-between-gen-and-turing-for-probabilistic-programming/36624 "2025-09-03T08:58:09Z")

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Asked question in #probprog channel on Slack.

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## [\[ANN\] FLORIDyn.jl initial release v0.5.1](https://discourse.julialang.org/t/ann-floridyn-jl-initial-release-v0-5-1/131994)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 2\
**Last updated:** [September 3, 2025, 7:51am UTC](https://discourse.julialang.org/t/ann-floridyn-jl-initial-release-v0-5-1/131994 "2025-09-03T07:51:47Z")

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We want to announce the initial release of a Julia version of FLORIDyn.jl, a dynamic wind farm simulation software originally written by Marcus Becker in Matlab. This software allows to: Simulate wind farms dynamically…

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## [Convert a PythonCall df to Julia df, incomplete conversion](https://discourse.julialang.org/t/convert-a-pythoncall-df-to-julia-df-incomplete-conversion/132054)

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**Author:** [@Ju\_ska](https://discourse.julialang.org/u/Ju_ska)\
**Replies:** 6\
**Last updated:** [September 3, 2025, 6:02am UTC](https://discourse.julialang.org/t/convert-a-pythoncall-df-to-julia-df-incomplete-conversion/132054 "2025-09-03T06:02:34Z")

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Hi, I have a PythonCall result looking like: julia\> forecast Python: ds trend yhat\_lower ... multiplicative\_terms\_lower multiplicative\_terms\_upper yhat 0 2024-04-08 06:19…

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## [Iterate on calculated iterable](https://discourse.julialang.org/t/iterate-on-calculated-iterable/132026)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 6\
**Last updated:** [September 2, 2025, 10:23pm UTC](https://discourse.julialang.org/t/iterate-on-calculated-iterable/132026 "2025-09-02T22:23:08Z")

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I have a type for which I want to implement a kind of iteration, which I can easily do with functions in Iterators. But I want iteration to happen on something I construct. MWE: struct NamedProduct{T} np::T end fun…

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## [Using Julia autodiff code from python with JAX](https://discourse.julialang.org/t/using-julia-autodiff-code-from-python-with-jax/132062)

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**Author:** [@gpxl](https://discourse.julialang.org/u/gpxl)\
**Replies:** 11\
**Last updated:** [September 2, 2025, 7:34pm UTC](https://discourse.julialang.org/t/using-julia-autodiff-code-from-python-with-jax/132062 "2025-09-02T19:34:01Z")

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I have a pretty basic question. I am a scientist who is new to Julia (hence the category I am posting this in), but interested in learning more both out of personal curiosity as well as the possible benefits for my own w…

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## [Calling Threads.@threads in a macro definition](https://discourse.julialang.org/t/calling-threads-threads-in-a-macro-definition/132058)

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**Author:** [@bjarthur](https://discourse.julialang.org/u/bjarthur)\
**Replies:** 2\
**Last updated:** [September 2, 2025, 6:06pm UTC](https://discourse.julialang.org/t/calling-threads-threads-in-a-macro-definition/132058 "2025-09-02T18:06:39Z")

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it’s a hygiene problem i think. is there a way to escape i? claude suggests i rewrite it to use @spawn, which i think would work, but i figure there must be a way to use @threads properly, no? julia\> macro foo() …

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## [Security review](https://discourse.julialang.org/t/security-review/132041)

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**Author:** [@amrods](https://discourse.julialang.org/u/amrods)\
**Replies:** 9\
**Last updated:** [September 2, 2025, 5:48pm UTC](https://discourse.julialang.org/t/security-review/132041 "2025-09-02T17:48:45Z")

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I convinced my organization to give Julia a try. I am now responsible for setting up a process to review and approve code libraries prior to inclusion to a local software repository. I am to perform vulnerability scanni…

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## [Can't build PythonCall](https://discourse.julialang.org/t/cant-build-pythoncall/132013)

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**Author:** [@Ju\_ska](https://discourse.julialang.org/u/Ju_ska)\
**Replies:** 7\
**Last updated:** [September 2, 2025, 2:40pm UTC](https://discourse.julialang.org/t/cant-build-pythoncall/132013 "2025-09-02T14:40:21Z")

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Hi, Julia 1.11.6: julia\> import Pkg julia\> Pkg.build("PythonCall") Precompiling project... ✗ PythonPlot 0 dependencies successfully precompiled in 4 seconds. 482 already precompiled. 1 dependency errored. For …

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## [The geometry of the geometric series](https://discourse.julialang.org/t/the-geometry-of-the-geometric-series/131976)

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**Author:** [@g2g](https://discourse.julialang.org/u/g2g)\
**Replies:** 6\
**Last updated:** [September 2, 2025, 1:34pm UTC](https://discourse.julialang.org/t/the-geometry-of-the-geometric-series/131976 "2025-09-02T13:34:21Z")

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This year’s Summer of Math Exposition (SoME) judging starts this Wednesday (03 Sep 2025). This year’s version of the contest encourages expositions that would be helpful to high school math classes. I’m submitting this e…

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## [Warp, REPL, and diacritics](https://discourse.julialang.org/t/warp-repl-and-diacritics/132040)

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**Author:** [@Joris\_Pinkse](https://discourse.julialang.org/u/Joris_Pinkse)\
**Replies:** 9\
**Last updated:** [September 2, 2025, 9:10am UTC](https://discourse.julialang.org/t/warp-repl-and-diacritics/132040 "2025-09-02T09:10:04Z")

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If I use the Julia REPL from the Warp command line (with JuliaMono font), no diacritics are visible. They are visible on the Warp command line itself and also in the REPL if I start the REPL from the default (Ubuntu 25.…

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## [Can't run julia from windows terminal (Julia 1.8.2 / Windows 10)](https://discourse.julialang.org/t/cant-run-julia-from-windows-terminal-julia-1-8-2-windows-10/88847)

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**Author:** [@scelles](https://discourse.julialang.org/u/scelles)\
**Replies:** 6\
**Last updated:** [September 2, 2025, 8:05am UTC](https://discourse.julialang.org/t/cant-run-julia-from-windows-terminal-julia-1-8-2-windows-10/88847 "2025-09-02T08:05:39Z")

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Hello, Under Windows 10 trying to run julia from terminal (added to PATH), I’m stuck with the following message : Cannot find file at 'c:\\windows\\system32\\config\\systemprofile\\appdata\\local\\programs\\julia-1.8.2\\bin\\jul…

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## [Precipitates in a 3D matrix](https://discourse.julialang.org/t/precipitates-in-a-3d-matrix/132002)

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**Author:** [@ES\_VI](https://discourse.julialang.org/u/ES_VI)\
**Replies:** 6\
**Last updated:** [September 2, 2025, 5:15am UTC](https://discourse.julialang.org/t/precipitates-in-a-3d-matrix/132002 "2025-09-02T05:15:56Z")

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Hi Everyone! I am trying to plot my data (4 columns x,y,z,composition) which when plotted in MATLAB looks like the figure attached. I tried other opensource tools like GNUPLOT and Octave. But those show the precipita…

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## [FlexiJoins vs SortMerge (particularly in astronomy workflows)](https://discourse.julialang.org/t/flexijoins-vs-sortmerge-particularly-in-astronomy-workflows/128632)

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**Author:** [@aplavin](https://discourse.julialang.org/u/aplavin)\
**Replies:** 9\
**Last updated:** [September 2, 2025, 3:17am UTC](https://discourse.julialang.org/t/flexijoins-vs-sortmerge-particularly-in-astronomy-workflows/128632 "2025-09-02T03:17:20Z")

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I wouldn’t call FlexiJoins.jl “polished” tbh :slight\_smile: It does support lots of different join conditions with generally efficient implementations, but stuff like error messages and internal implementation design ca…

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## [In ComplexityMeasures.jl, is there a way to use elements of an OutcomeSpace as keys for Probabilities?](https://discourse.julialang.org/t/in-complexitymeasures-jl-is-there-a-way-to-use-elements-of-an-outcomespace-as-keys-for-probabilities/132038)

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**Author:** [@mikhael](https://discourse.julialang.org/u/mikhael)\
**Replies:** 0\
**Last updated:** [September 1, 2025, 9:57pm UTC](https://discourse.julialang.org/t/in-complexitymeasures-jl-is-there-a-way-to-use-elements-of-an-outcomespace-as-keys-for-probabilities/132038 "2025-09-01T21:57:09Z")

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Suppose I build a Probabilities object Prs from a vector x like so: using ComplexityMeasures x = rand(\[true, false\], 10) Prs, outs = allprobabilities\_and\_outcomes(UniqueElements(), x) I would like to have a Dict-like…

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## [Stack overflow when calling dynamic library requiring executable tack in the REPL](https://discourse.julialang.org/t/stack-overflow-when-calling-dynamic-library-requiring-executable-tack-in-the-repl/132027)

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**Author:** [@HugoMVale](https://discourse.julialang.org/u/HugoMVale)\
**Replies:** 0\
**Last updated:** [September 1, 2025, 6:04pm UTC](https://discourse.julialang.org/t/stack-overflow-when-calling-dynamic-library-requiring-executable-tack-in-the-repl/132027 "2025-09-01T18:04:42Z")

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I am writing bindings to a Fortran library. The bindings work perfectly when launched as “run file in new process”. Conversely, when launched directly from the REPL, a stack overflow error is raised, without further info…

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## [On formatting the display of integer arrays](https://discourse.julialang.org/t/on-formatting-the-display-of-integer-arrays/132023)

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**Author:** [@rcomm](https://discourse.julialang.org/u/rcomm)\
**Replies:** 6\
**Last updated:** [September 1, 2025, 5:48pm UTC](https://discourse.julialang.org/t/on-formatting-the-display-of-integer-arrays/132023 "2025-09-01T17:48:14Z")

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I do combinatorial work which generates arrays containing small integers. Some arrays are large, so to reduce memory footprint all calculations are done in UInt8. Part of the analysis is to visually scan displays of se…

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## [Another undefined variable puzzle](https://discourse.julialang.org/t/another-undefined-variable-puzzle/132025)

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**Author:** [@alan](https://discourse.julialang.org/u/alan)\
**Replies:** 1\
**Last updated:** [September 1, 2025, 4:47pm UTC](https://discourse.julialang.org/t/another-undefined-variable-puzzle/132025 "2025-09-01T16:47:42Z")

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Here is some code that (I think) ought to work, but doesn’t: module foo x = 1 # line 3 while true y = x # line 5 x = 4 # line 6 break end end # module The error message (below) says that x on…

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## [Wrapping a Flux FCN model with MLJFlux](https://discourse.julialang.org/t/wrapping-a-flux-fcn-model-with-mljflux/132024)

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**Author:** [@cirobr](https://discourse.julialang.org/u/cirobr)\
**Replies:** 0\
**Last updated:** [September 1, 2025, 3:51pm UTC](https://discourse.julialang.org/t/wrapping-a-flux-fcn-model-with-mljflux/132024 "2025-09-01T15:51:49Z")

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Cheers, I wonder if it is possible to wrap a fully convolutional network written in Flux (e.g. a U-Net) with MLJFlux, and benefit from the high-level interface from MLJ. FCN outputs are typically multi-dimensional array…

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## [Create \`IOBuffer\` from \`Ptr{UInt8}\` (in a \`Base.@ccallable\` function)](https://discourse.julialang.org/t/create-iobuffer-from-ptr-uint8-in-a-base-ccallable-function/132014)

<div class="topic-metadata">

**Author:** [@asprionj](https://discourse.julialang.org/u/asprionj)\
**Replies:** 2\
**Last updated:** [September 1, 2025, 3:31pm UTC](https://discourse.julialang.org/t/create-iobuffer-from-ptr-uint8-in-a-base-ccallable-function/132014 "2025-09-01T15:31:45Z")

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I have to generate a shared library that uses protocol buffers for receiving and sending data. So, basically a function such as @Base.ccallable function protobuf\_IO(pb\_in::Ptr{UInt8})::Ptr{UInt8} ... end that then …

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## [Multi-threaded processing of a Dict](https://discourse.julialang.org/t/multi-threaded-processing-of-a-dict/131996)

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**Author:** [@jlbosse](https://discourse.julialang.org/u/jlbosse)\
**Replies:** 8\
**Last updated:** [September 1, 2025, 2:09pm UTC](https://discourse.julialang.org/t/multi-threaded-processing-of-a-dict/131996 "2025-09-01T14:09:08Z")

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I have a function that iterates over all key-value pairs, does a computation based on the key and the value and then updates the value at that key. Due to the fact that in each iteration I only update the value and don’t…

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