# Latest

**URL:** https://discourse.julialang.org/latest.md?page=107

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

**Page:** 108

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## [FixFunctionArgument.jl: Fix a function positional argument to a callable. Stand-in replacement for Base.Fix](https://discourse.julialang.org/t/fixfunctionargument-jl-fix-a-function-positional-argument-to-a-callable-stand-in-replacement-for-base-fix/132532)

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**Author:** [@nsajko](https://discourse.julialang.org/u/nsajko)\
**Replies:** 0\
**Last updated:** [September 21, 2025, 7:45am UTC](https://discourse.julialang.org/t/fixfunctionargument-jl-fix-a-function-positional-argument-to-a-callable-stand-in-replacement-for-base-fix/132532 "2025-09-21T07:45:42Z")

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Suboptimal design in Base.Fix, also applying to Base.Fix1 and Base.Fix2, causes things like Base.Fix1(convert, Bool) to have a greater than zero representation in memory, because Bool isa Type. Fixing this in Base would …

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## [\[ANN\] GitLabCodeQualityReports.jl](https://discourse.julialang.org/t/ann-gitlabcodequalityreports-jl/132542)

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**Author:** [@danielmatz](https://discourse.julialang.org/u/danielmatz)\
**Replies:** 1\
**Last updated:** [September 22, 2025, 4:11am UTC](https://discourse.julialang.org/t/ann-gitlabcodequalityreports-jl/132542 "2025-09-22T04:11:43Z")

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We use GitLab at work, and I was looking for a way to make deprecation warnings (and other warnings) more visible in the CI status. One option is to grep through the stderr of your test suite for the word “warning,” and…

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## [Having a julia package inside a monorepo called from python](https://discourse.julialang.org/t/having-a-julia-package-inside-a-monorepo-called-from-python/132549)

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**Author:** [@oxinabox](https://discourse.julialang.org/u/oxinabox)\
**Replies:** 1\
**Last updated:** [September 22, 2025, 3:26am UTC](https://discourse.julialang.org/t/having-a-julia-package-inside-a-monorepo-called-from-python/132549 "2025-09-22T03:26:55Z")

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so I have a largish python code base in a nice mono-repo. (Its also got some typescript in there). I want to move some of our core logic to julia for performanced. So I thought I would make a (local, unregistered) jul…

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## [Apple M4 Max AMX Linear Algebra performance versus CPU and GPU](https://discourse.julialang.org/t/apple-m4-max-amx-linear-algebra-performance-versus-cpu-and-gpu/132537)

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**Author:** [@PetarM](https://discourse.julialang.org/u/PetarM)\
**Replies:** 2\
**Last updated:** [September 22, 2025, 12:17am UTC](https://discourse.julialang.org/t/apple-m4-max-amx-linear-algebra-performance-versus-cpu-and-gpu/132537 "2025-09-22T00:17:46Z")

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Hello everybody! I made a video investigation of Apple’s AMX accelerator Linear Algebra performance in Julia: https://www.youtube.com/watch?v=TjfA9LVgHXk According to my findings, the 2 AMX cores achieve almost 3 times…

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## [Compact form of a set of constraints](https://discourse.julialang.org/t/compact-form-of-a-set-of-constraints/129220)

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**Author:** [@rocco\_sprmnt21](https://discourse.julialang.org/u/rocco_sprmnt21)\
**Replies:** 9\
**Last updated:** [September 21, 2025, 9:31pm UTC](https://discourse.julialang.org/t/compact-form-of-a-set-of-constraints/129220 "2025-09-21T21:31:31Z")

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I have the following script that works for the case N=4. using JuMP import HiGHS m = Model(HiGHS.Optimizer); @variable(m, x\[1:4,1:8\], Bin) @variable(m, y\[1:4,1:6\], Bin) @constraints(m, begin \[j in 1:8\], sum(x\[r,j\]…

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## [Multiple dispatch and type hierarchies](https://discourse.julialang.org/t/multiple-dispatch-and-type-hierarchies/132536)

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**Author:** [@damiansimon2](https://discourse.julialang.org/u/damiansimon2)\
**Replies:** 2\
**Last updated:** [September 21, 2025, 9:50pm UTC](https://discourse.julialang.org/t/multiple-dispatch-and-type-hierarchies/132536 "2025-09-21T21:50:27Z")

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Dear Julia community, i have been thinking about why multiple dispatch and julias type system works so well (often times) and why it doesnt sometimes. Correct me if i am wrong, but as i see it this system only works wel…

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## [Hybrid MCMC Algorithm](https://discourse.julialang.org/t/hybrid-mcmc-algorithm/132400)

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**Author:** [@jackmarry](https://discourse.julialang.org/u/jackmarry)\
**Replies:** 2\
**Last updated:** [September 21, 2025, 5:04pm UTC](https://discourse.julialang.org/t/hybrid-mcmc-algorithm/132400 "2025-09-21T17:04:25Z")

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I saw the steps for a Bayesian estimation algorithm in a paper, and I was wondering if there’s a way to implement this kind of hybrid MCMC algorithm using the Turing.jl library.

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## [Confusing about -e and CLI use (relates to package precompilation)](https://discourse.julialang.org/t/confusing-about-e-and-cli-use-relates-to-package-precompilation/132526)

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**Author:** [@dankelley](https://discourse.julialang.org/u/dankelley)\
**Replies:** 5\
**Last updated:** [September 21, 2025, 1:20pm UTC](https://discourse.julialang.org/t/confusing-about-e-and-cli-use-relates-to-package-precompilation/132526 "2025-09-21T13:20:11Z")

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I’m trying to use the documenter package with a github action (for a crude package I’m trying to construct GitHub - dankelley/OceanAnalysis.jl: Julia code for oceanographic analysis), and am seeing problems with building…

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## [Capturing warnings inside generated functions](https://discourse.julialang.org/t/capturing-warnings-inside-generated-functions/132535)

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**Author:** [@giordano](https://discourse.julialang.org/u/giordano)\
**Replies:** 3\
**Last updated:** [September 21, 2025, 12:50pm UTC](https://discourse.julialang.org/t/capturing-warnings-inside-generated-functions/132535 "2025-09-21T12:50:53Z")

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Is there a way to capture logging messages (e.g. warnings) issued during compilation, for example from inside a generated function? For example julia\> using Logging julia\> @generated foo() = @warn "this warning is emi…

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## [Good way to parametrize over type parameter?](https://discourse.julialang.org/t/good-way-to-parametrize-over-type-parameter/132533)

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**Author:** [@loisel](https://discourse.julialang.org/u/loisel)\
**Replies:** 4\
**Last updated:** [September 21, 2025, 12:27pm UTC](https://discourse.julialang.org/t/good-way-to-parametrize-over-type-parameter/132533 "2025-09-21T12:27:28Z")

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Hi, I’m writing a numerical code that is parametrized by T, which is typically T=Float64 but could be one of the other number types. It’s a PDE solver so I’ve got a bunch of other types I call “geometries”, say A{T}, B{…

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## [Proper Makie.jl recipe usage](https://discourse.julialang.org/t/proper-makie-jl-recipe-usage/132502)

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**Author:** [@langestefan](https://discourse.julialang.org/u/langestefan)\
**Replies:** 7\
**Last updated:** [September 21, 2025, 12:11pm UTC](https://discourse.julialang.org/t/proper-makie-jl-recipe-usage/132502 "2025-09-21T12:11:36Z")

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This is the first time I am writing a recipe and I am a bit lost in all the options. Basically I want to have a few convenient plotting functions for a package I am working on. It calculates solar positions, which are ju…

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## [Hexahedron volume plot](https://discourse.julialang.org/t/hexahedron-volume-plot/131489)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 6\
**Last updated:** [September 21, 2025, 11:49am UTC](https://discourse.julialang.org/t/hexahedron-volume-plot/131489 "2025-09-21T11:49:26Z")

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How to volume plot a Hexahedron :ice: for colors given at each vertices? using Meshes, CoordRefSystems ,GLMakie, LinearAlgebra, Unitful r = Float32\[1.6, 1.754088, 1.9230156, 2.1082115, 2.311243, 2.5338273, 2.7778475, …

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## [Julia current recommendations for daemon/cron](https://discourse.julialang.org/t/julia-current-recommendations-for-daemon-cron/132522)

<div class="topic-metadata">

**Author:** [@hadrien.theveneau](https://discourse.julialang.org/u/hadrien.theveneau)\
**Replies:** 5\
**Last updated:** [September 21, 2025, 10:40am UTC](https://discourse.julialang.org/t/julia-current-recommendations-for-daemon-cron/132522 "2025-09-21T10:40:15Z")

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Hi everyone, I would like to use Julia to write some system script which will be run by cron/systemd or something similar. Which is the best way to install Julia for this usage ? The usual “user way” is convenient for u…

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## [\[GSoC 2025\] Supporting Patient-Level Pipelines within JuliaHealth](https://discourse.julialang.org/t/gsoc-2025-supporting-patient-level-pipelines-within-juliahealth/132534)

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**Author:** [@kosuri-indu](https://discourse.julialang.org/u/kosuri-indu)\
**Replies:** 0\
**Last updated:** [September 21, 2025, 8:29am UTC](https://discourse.julialang.org/t/gsoc-2025-supporting-patient-level-pipelines-within-juliahealth/132534 "2025-09-21T08:29:10Z")

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Hello Julia Community! :waving\_hand: I’m thrilled to share a major milestone: I’ve officially completed my Google Summer Of Code 2025 project with JuliaHealth! This summer, I had the incredible opportunity to improve to…

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## [Multi-threaded Array building](https://discourse.julialang.org/t/multi-threaded-array-building/132463)

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**Author:** [@FerreolS](https://discourse.julialang.org/u/FerreolS)\
**Replies:** 22\
**Last updated:** [September 20, 2025, 6:03pm UTC](https://discourse.julialang.org/t/multi-threaded-array-building/132463 "2025-09-20T18:03:52Z")

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Dear all, I have a code of this kind to build an array: N= 2000 A = zeros(Float64,N,N) B # some long (\>\>10\_000) vector of custom struct for idx in arrayofindex #\> lots (\>\>10\_000) of elements i,j,v = processing(B\[…

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## [Changing struct fields to a different sub-type during run time](https://discourse.julialang.org/t/changing-struct-fields-to-a-different-sub-type-during-run-time/132346)

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**Author:** [@stevenhughes](https://discourse.julialang.org/u/stevenhughes)\
**Replies:** 19\
**Last updated:** [September 20, 2025, 6:06pm UTC](https://discourse.julialang.org/t/changing-struct-fields-to-a-different-sub-type-during-run-time/132346 "2025-09-20T18:06:27Z")

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Hello everyone, I am working on an aerospace system and as I am developing more complex use cases, I need to change fields on structs to a new type during a simulation. For example, when a spacecraft leaves the Earth s…

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## [Scientific Computing Engineer for the Dynamic Systems group at UMR MISTEA - INRAE in Montpellier, France](https://discourse.julialang.org/t/scientific-computing-engineer-for-the-dynamic-systems-group-at-umr-mistea-inrae-in-montpellier-france/132288)

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**Author:** [@dmetivie](https://discourse.julialang.org/u/dmetivie)\
**Replies:** 2\
**Last updated:** [September 20, 2025, 1:09pm UTC](https://discourse.julialang.org/t/scientific-computing-engineer-for-the-dynamic-systems-group-at-umr-mistea-inrae-in-montpellier-france/132288 "2025-09-20T13:09:16Z")

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INRAE (French National Research Institute for Agriculture, Food and Environment) is hiring a Scientific Computing Engineer for the Dynamic Systems group at UMR MISTEA (my lab) in Montpellier, France. Key points: Focus…

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## [RCCL wrapping](https://discourse.julialang.org/t/rccl-wrapping/132287)

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**Author:** [@fran94](https://discourse.julialang.org/u/fran94)\
**Replies:** 4\
**Last updated:** [September 20, 2025, 12:32pm UTC](https://discourse.julialang.org/t/rccl-wrapping/132287 "2025-09-20T12:32:28Z")

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Hi! I’m trying to wrap the Radeon collective communication library (RCCL), the ROCm counterpart to NCCL. I’m taking heavy inspiration from NCCL.jl regarding wrapping strategy since RCCL itself closely mimics NCCL. I hav…

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## [Issue with rewriting by projecting out the body of a loop](https://discourse.julialang.org/t/issue-with-rewriting-by-projecting-out-the-body-of-a-loop/132520)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 5\
**Last updated:** [September 20, 2025, 9:01am UTC](https://discourse.julialang.org/t/issue-with-rewriting-by-projecting-out-the-body-of-a-loop/132520 "2025-09-20T09:01:12Z")

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inspired by this observation Local variable inside a loop: why it ERRORs - #6 by sgaure, I come up with this comparative test, and wonder why they lead to distinct result function test() v = Function\[\] for i = 1…

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## [JuliaCon Local Paris 2025 Hackathon program?](https://discourse.julialang.org/t/juliacon-local-paris-2025-hackathon-program/132524)

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**Author:** [@hadrien.theveneau](https://discourse.julialang.org/u/hadrien.theveneau)\
**Replies:** 0\
**Last updated:** [September 20, 2025, 7:43am UTC](https://discourse.julialang.org/t/juliacon-local-paris-2025-hackathon-program/132524 "2025-09-20T07:43:45Z")

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Hi everyone, I saw in the schedule of JuliaCon Local Paris 2025 that an hackathon is planned. However, I didn’t find information about its program yet. What would be the subjects/projects covered ? Many thanks, Have a…

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## [How to change the default RNG for a given script?](https://discourse.julialang.org/t/how-to-change-the-default-rng-for-a-given-script/132481)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 7\
**Last updated:** [September 19, 2025, 2:28pm UTC](https://discourse.julialang.org/t/how-to-change-the-default-rng-for-a-given-script/132481 "2025-09-19T14:28:35Z")

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I know I can pass RNG to many (all?) stochastic functions, and that StableRNG is slow, but is there a way I can set at the beginning of my model something like: random\_seed = 123 # from a config file Random.GLO…

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## [Cannot fix \`nothing\` in summation](https://discourse.julialang.org/t/cannot-fix-nothing-in-summation/132507)

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**Author:** [@rgouveiamendes](https://discourse.julialang.org/u/rgouveiamendes)\
**Replies:** 7\
**Last updated:** [September 19, 2025, 2:04pm UTC](https://discourse.julialang.org/t/cannot-fix-nothing-in-summation/132507 "2025-09-19T14:04:40Z")

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Hello, I am trying to perform the following transformation on a DataFrame: @transform! df\_20\_P\_raw\[:data\] begin # Calculate the sum of the relevant columns, replacing missing values with 0 :pensions\_balance\_pro…

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## [How to extract solution when using Trixi.jl](https://discourse.julialang.org/t/how-to-extract-solution-when-using-trixi-jl/132512)

<div class="topic-metadata">

**Author:** [@mra](https://discourse.julialang.org/u/mra)\
**Replies:** 3\
**Last updated:** [September 19, 2025, 1:41pm UTC](https://discourse.julialang.org/t/how-to-extract-solution-when-using-trixi-jl/132512 "2025-09-19T13:41:37Z")

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I have trouble extracting the solution in a format of points where each point stores (x, u) where x is the coordinate (position) and u is the value at that position. Even though I can extract the coordinates x and value…

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## [Non-const globals in a macro and performances on the function calling the macro](https://discourse.julialang.org/t/non-const-globals-in-a-macro-and-performances-on-the-function-calling-the-macro/132490)

<div class="topic-metadata">

**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 8\
**Last updated:** [September 19, 2025, 12:43pm UTC](https://discourse.julialang.org/t/non-const-globals-in-a-macro-and-performances-on-the-function-calling-the-macro/132490 "2025-09-19T12:43:36Z")

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I am trying to implement some “fixed stochasticity” in individual functions of my model (called once), where I have a global seed and then this is re-seed on each needed function based on the name of the function and the…

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## [Check whether a package name is available for automatic registration in the General registry](https://discourse.julialang.org/t/check-whether-a-package-name-is-available-for-automatic-registration-in-the-general-registry/132510)

<div class="topic-metadata">

**Author:** [@nsajko](https://discourse.julialang.org/u/nsajko)\
**Replies:** 3\
**Last updated:** [September 19, 2025, 12:38pm UTC](https://discourse.julialang.org/t/check-whether-a-package-name-is-available-for-automatic-registration-in-the-general-registry/132510 "2025-09-19T12:38:18Z")

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Is there a way to check whether a package name would pass the automatic checks guarding registration? Other than starting registration outright.

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## [Solving the Boltzmann transport equation using Trixi.jl](https://discourse.julialang.org/t/solving-the-boltzmann-transport-equation-using-trixi-jl/132509)

<div class="topic-metadata">

**Author:** [@drandran12](https://discourse.julialang.org/u/drandran12)\
**Replies:** 4\
**Last updated:** [September 19, 2025, 12:35pm UTC](https://discourse.julialang.org/t/solving-the-boltzmann-transport-equation-using-trixi-jl/132509 "2025-09-19T12:35:58Z")

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I need to solve the two spatial dimensional Boltzmann transport equation of the form: \\left\[\\partial\_t+\\vec{k} \\cdot \\vec{\\nabla}\_x-\\vec{\\nabla}\_x V \\cdot \\vec{\\nabla}\_k\\right\] n(\\vec{x}, t, \\vec{k})=-4 \\Gamma\_a \\int \\…

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## [Import order: from the most general packages to the most specific ones, or the opposite (or it doesn't matter ?)](https://discourse.julialang.org/t/import-order-from-the-most-general-packages-to-the-most-specific-ones-or-the-opposite-or-it-doesnt-matter/132506)

<div class="topic-metadata">

**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 3\
**Last updated:** [September 19, 2025, 8:41am UTC](https://discourse.julialang.org/t/import-order-from-the-most-general-packages-to-the-most-specific-ones-or-the-opposite-or-it-doesnt-matter/132506 "2025-09-19T08:41:31Z")

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When you need to import several packages, and you believe that there is some inner dependency between them, do you start importing the general ones first or the specific ones first, or it doesn’t matter ? eg: import Do…

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## [Seek efficient fast manipulation of power series](https://discourse.julialang.org/t/seek-efficient-fast-manipulation-of-power-series/132084)

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**Author:** [@TonyRoberts](https://discourse.julialang.org/u/TonyRoberts)\
**Replies:** 19\
**Last updated:** [September 19, 2025, 12:36am UTC](https://discourse.julialang.org/t/seek-efficient-fast-manipulation-of-power-series/132084 "2025-09-19T00:36:14Z")

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I am investigating changing from Reduce computer algebra to Julia symbolics. My main first need is efficient manipulation of power series (aiming for multiple small variables, and coefficients being complicated algebr…

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## [Inconsistency with SavingCallback](https://discourse.julialang.org/t/inconsistency-with-savingcallback/132321)

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**Author:** [@dnldlg](https://discourse.julialang.org/u/dnldlg)\
**Replies:** 1\
**Last updated:** [September 19, 2025, 12:09am UTC](https://discourse.julialang.org/t/inconsistency-with-savingcallback/132321 "2025-09-19T00:09:46Z")

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I try to track the behavior of the parameters throughout an integration with DifferentialEquations.jl while using Callbacks. To do this I used SavingCallback, but noticed the following inconsistency with the argument sa…

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## [@mtkmodel ODE Confusion, DiffEqParamEstim](https://discourse.julialang.org/t/mtkmodel-ode-confusion-diffeqparamestim/132228)

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**Author:** [@jdm204](https://discourse.julialang.org/u/jdm204)\
**Replies:** 1\
**Last updated:** [September 18, 2025, 11:37pm UTC](https://discourse.julialang.org/t/mtkmodel-ode-confusion-diffeqparamestim/132228 "2025-09-18T23:37:19Z")

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Apologies, I think I have a basic misunderstanding somewhere, I’ve been stuck for a few days. I’m struggling to understand how I should use @mtkmodel defined ODEs, I ran into the problem trying to use DiffEqParamEstim. I…

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