# Latest

**URL:** https://discourse.julialang.org/latest.md?page=25

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

**Page:** 26

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## [Using DifferentialEquations.jl with ghost cells](https://discourse.julialang.org/t/using-differentialequations-jl-with-ghost-cells/137561)

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**Author:** [@Lucas](https://discourse.julialang.org/u/Lucas)\
**Replies:** 3\
**Last updated:** [June 12, 2026, 10:08am UTC](https://discourse.julialang.org/t/using-differentialequations-jl-with-ghost-cells/137561 "2026-06-12T10:08:54Z")

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I’m trying to solve a few differential equations using the method of lines. I’m using a five-point laplacian and ghost cells. I will add some code below, for the case of an imaginary-time Gross-Pitaevskii equation with c…

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## [Plotting polygons defined in degrees](https://discourse.julialang.org/t/plotting-polygons-defined-in-degrees/137556)

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**Author:** [@Mastomaki](https://discourse.julialang.org/u/Mastomaki)\
**Replies:** 14\
**Last updated:** [June 12, 2026, 9:26am UTC](https://discourse.julialang.org/t/plotting-polygons-defined-in-degrees/137556 "2026-06-12T09:26:26Z")

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I’m trying to plot the polygons from GADM.jl. I do the following: using GeoTables using GeoArtifacts using Countries using DataFrames using Meshes using GLMakie using GeoMakie \> gdf = GADM.get("FIN"; level=0) \> p = re…

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## [Status of Julia parser for tree-sitter](https://discourse.julialang.org/t/status-of-julia-parser-for-tree-sitter/137537)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 4\
**Last updated:** [June 12, 2026, 6:14am UTC](https://discourse.julialang.org/t/status-of-julia-parser-for-tree-sitter/137537 "2026-06-12T06:14:21Z")

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Which is the recommended tree-sitter parser for Julia? The “official” one seems to be unmaintained; pull requests are not looked at for months, etc. Among the forks, @aviatesk has recent commits.

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## [Recompilation of test project](https://discourse.julialang.org/t/recompilation-of-test-project/137552)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 17\
**Last updated:** [June 11, 2026, 10:29pm UTC](https://discourse.julialang.org/t/recompilation-of-test-project/137552 "2026-06-11T22:29:01Z")

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In the past, I put my test dependencies in the main Project.toml file in the \[extras\] section. Recently, I started to use sub-projects and a separate Project.toml file in the test folder. But now the packages are pre-c…

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## [How to manage memory when using JuMP+Gurobi?](https://discourse.julialang.org/t/how-to-manage-memory-when-using-jump-gurobi/136807)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 10\
**Last updated:** [June 11, 2026, 9:18pm UTC](https://discourse.julialang.org/t/how-to-manage-memory-when-using-jump-gurobi/136807 "2026-06-11T21:18:30Z")

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Observe this usr@usr:~/julia\_projects/uc/Uc$ julia --project=. --threads=1,0 \_ \_ \_ \_(\_)\_ | Documentation: https://docs.julialang.org (\_) | (\_) (\_) | \_ \_ \_| |\_ \_\_ \_ | Type "…

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## [Thread-safe implementation for simple counter/mean](https://discourse.julialang.org/t/thread-safe-implementation-for-simple-counter-mean/137542)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 21\
**Last updated:** [June 11, 2026, 3:58pm UTC](https://discourse.julialang.org/t/thread-safe-implementation-for-simple-counter-mean/137542 "2026-06-11T15:58:04Z")

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I have a callable which performs an iterative calculation, which is otherwise thread-safe. I would like to keep a statistic of the mean number of iterations that it used, and is thread-safe. Stylized code follows: muta…

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## [Does the interactive thread have due performance?](https://discourse.julialang.org/t/does-the-interactive-thread-have-due-performance/137568)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 1\
**Last updated:** [June 11, 2026, 3:54pm UTC](https://discourse.julialang.org/t/does-the-interactive-thread-have-due-performance/137568 "2026-06-11T15:54:51Z")

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I have 2 physical chips on my machine, each having 64 physical cores. So there are 2 \* 2 \* 64 = 256 virtual processors. julia\> Sys.cpu\_summary() AMD EPYC 7763 64-Core Processor: speed user ni…

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## [Installing Dowloads 1.7 on julia 1.10 installs v1.6](https://discourse.julialang.org/t/installing-dowloads-1-7-on-julia-1-10-installs-v1-6/137558)

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**Author:** [@oxinabox](https://discourse.julialang.org/u/oxinabox)\
**Replies:** 2\
**Last updated:** [June 11, 2026, 2:08pm UTC](https://discourse.julialang.org/t/installing-dowloads-1-7-on-julia-1-10-installs-v1-6/137558 "2026-06-11T14:08:27Z")

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What is going on with this. I assume it is some kind of stdlib shenanigans? (@v1.10) pkg\> add Downloads@1.7 Updating registry at \`~/.julia/registries/General.toml\` Resolving package versions... Updating \`~/do…

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## [Julia CodecZLib fails while python succeeds](https://discourse.julialang.org/t/julia-codeczlib-fails-while-python-succeeds/137548)

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**Author:** [@Tomas\_Pevny](https://discourse.julialang.org/u/Tomas_Pevny)\
**Replies:** 9\
**Last updated:** [June 11, 2026, 12:23pm UTC](https://discourse.julialang.org/t/julia-codeczlib-fails-while-python-succeeds/137548 "2026-06-11T12:23:52Z")

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Hi all, I have been trying to read avro files to Julia using Avro.jl, and I have received an error. I have used Claude to find the error and create a MWE and he thinks that the problem is actually in CodecZLib. I have a…

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## [OOP-brained design patterns](https://discourse.julialang.org/t/oop-brained-design-patterns/135423)

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**Author:** [@foobar\_lv2](https://discourse.julialang.org/u/foobar_lv2)\
**Replies:** 3\
**Last updated:** [June 11, 2026, 5:35am UTC](https://discourse.julialang.org/t/oop-brained-design-patterns/135423 "2026-06-11T05:35:08Z")

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I recently found myself writing julia code while somewhat OOP-brained. Surprisingly, the following design pattern works pretty well, so I want to share it for comments: # or mutable struct struct Base{Ext} baseField:…

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## [Changes in mtkcompile between v9.54 and v11.26](https://discourse.julialang.org/t/changes-in-mtkcompile-between-v9-54-and-v11-26/137536)

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**Author:** [@rveynde](https://discourse.julialang.org/u/rveynde)\
**Replies:** 3\
**Last updated:** [June 11, 2026, 1:05am UTC](https://discourse.julialang.org/t/changes-in-mtkcompile-between-v9-54-and-v11-26/137536 "2026-06-11T01:05:40Z")

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I am in the process of updating from MTK version 9.54 to 11.26 for my model. In general it looks like many things have sped up, which is great! There is one issue that I’m running into, namely that during mtkcompile I n…

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## [How to broadcast rand(lb:ub)?](https://discourse.julialang.org/t/how-to-broadcast-rand-lb-ub/137546)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 5\
**Last updated:** [June 10, 2026, 7:46pm UTC](https://discourse.julialang.org/t/how-to-broadcast-rand-lb-ub/137546 "2026-06-10T19:46:51Z")

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As from the title, how do I broadcast rand(lowerbound:upperbound) ? e.g. x = \[1,2,3\] a = 2 .\* x .+ rand.() # ok a = @. 2x + rand() # ok a = @. 2x + rand(1:2) # DimensionMismatch error BDW, I am aware of a = 2…

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## [Is there a general guide to Julia's PDE solving utilities based on the properties of the PDE in question?](https://discourse.julialang.org/t/is-there-a-general-guide-to-julias-pde-solving-utilities-based-on-the-properties-of-the-pde-in-question/137545)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 2\
**Last updated:** [June 10, 2026, 7:30pm UTC](https://discourse.julialang.org/t/is-there-a-general-guide-to-julias-pde-solving-utilities-based-on-the-properties-of-the-pde-in-question/137545 "2026-06-10T19:30:56Z")

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As I continue my foray into Julia, I’d like to apply it more directly to my research by utilizing its PDE-solving capabilities to solve the radial Schrodinger equation for one and two-electron systems, with an eye toward…

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## [MTK mtkcompile "fully\_determined" kwarg unexpected behavior](https://discourse.julialang.org/t/mtk-mtkcompile-fully-determined-kwarg-unexpected-behavior/137408)

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**Author:** [@mark.garnett](https://discourse.julialang.org/u/mark.garnett)\
**Replies:** 3\
**Last updated:** [June 10, 2026, 5:19pm UTC](https://discourse.julialang.org/t/mtk-mtkcompile-fully-determined-kwarg-unexpected-behavior/137408 "2026-06-10T17:19:52Z")

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Hi all, I’m not sure if bug or not, but setting the fully\_determined keyword argument to true on mtkcompile results in a compilation error, whereas setting it to false results in what seems to be a valid system, with an…

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## [\[ANN\] PetoiBittle.jl: control a Petoi Bittle robot dog from Julia](https://discourse.julialang.org/t/ann-petoibittle-jl-control-a-petoi-bittle-robot-dog-from-julia/137544)

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**Author:** [@bvdmitri](https://discourse.julialang.org/u/bvdmitri)\
**Replies:** 0\
**Last updated:** [June 10, 2026, 2:34pm UTC](https://discourse.julialang.org/t/ann-petoibittle-jl-control-a-petoi-bittle-robot-dog-from-julia/137544 "2026-06-10T14:34:04Z")

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Hi all, I’d like to share a hobby project: PetoiBittle.jl, which connects to and controls a Petoi Bittle / OpenCat robot dog over a serial port. As far as I know it’s the first Julia-native library for this hardware. T…

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## [Structure and performance questions from a Fortran programmer: functions, global variables, array allocations, input files, and structs](https://discourse.julialang.org/t/structure-and-performance-questions-from-a-fortran-programmer-functions-global-variables-array-allocations-input-files-and-structs/137409)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 35\
**Last updated:** [June 10, 2026, 1:46pm UTC](https://discourse.julialang.org/t/structure-and-performance-questions-from-a-fortran-programmer-functions-global-variables-array-allocations-input-files-and-structs/137409 "2026-06-10T13:46:24Z")

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I’m a physicist used to using Fortran90 for number crunching and Python for plotting and glue code. I’m learning Julia because of its ease of use, promised efficiency, and excellent math support. That said, there’s some …

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## [Unexpected path structure for module](https://discourse.julialang.org/t/unexpected-path-structure-for-module/137525)

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**Author:** [@tomtom](https://discourse.julialang.org/u/tomtom)\
**Replies:** 9\
**Last updated:** [June 10, 2026, 11:57am UTC](https://discourse.julialang.org/t/unexpected-path-structure-for-module/137525 "2026-06-10T11:57:38Z")

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I have a long term problem using apropos(): julia\> apropos("interpolate") Base.@async Base.Regex Base.@eval Base.Threads.@spawn DocStringExtensions.Abbreviation DocStringExtensions.interpolation MacroTools.@qq MacroTool…

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## [Speeding up antialiased non-linearity](https://discourse.julialang.org/t/speeding-up-antialiased-non-linearity/137456)

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**Author:** [@fps](https://discourse.julialang.org/u/fps)\
**Replies:** 2\
**Last updated:** [June 10, 2026, 7:30am UTC](https://discourse.julialang.org/t/speeding-up-antialiased-non-linearity/137456 "2026-06-10T07:30:54Z")

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Hi, I’m playing around with some guitar amplifier modeling and in the course of that I implemented the anti-derivative anti-aliased non-linearity of “Note on Alias Suppression in Digital Distortion”, Martin Vicanek in a…

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## [Juliaup configuration is locked by another process, waiting for it to unlock](https://discourse.julialang.org/t/juliaup-configuration-is-locked-by-another-process-waiting-for-it-to-unlock/121366)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 12\
**Last updated:** [June 10, 2026, 4:42am UTC](https://discourse.julialang.org/t/juliaup-configuration-is-locked-by-another-process-waiting-for-it-to-unlock/121366 "2026-06-10T04:42:54Z")

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Whenever I launch Julia in the bash terminal of VSCode in Ubuntu Linux I get the message: Juliaup configuration is locked by another process, waiting for it to unlock. What could be the reason?

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## [MTK libaries & initial values vs. initial guesses?](https://discourse.julialang.org/t/mtk-libaries-initial-values-vs-initial-guesses/137443)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 19\
**Last updated:** [June 9, 2026, 11:53pm UTC](https://discourse.julialang.org/t/mtk-libaries-initial-values-vs-initial-guesses/137443 "2026-06-09T23:53:39Z")

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In MTK libraries, should I include “hard-coded” initial values in components, or not? I’m toying with an alpha version of a library based on MTK, and have now come to the stage of testing whether I can linearize the com…

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## [Julia for TechnoEconomic Analyses (TEAs)?](https://discourse.julialang.org/t/julia-for-technoeconomic-analyses-teas/137494)

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**Author:** [@mpampuch](https://discourse.julialang.org/u/mpampuch)\
**Replies:** 3\
**Last updated:** [June 9, 2026, 9:59pm UTC](https://discourse.julialang.org/t/julia-for-technoeconomic-analyses-teas/137494 "2026-06-09T21:59:45Z")

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Hi, I need to perform a Technoeconomic analysis for a technology our group is developing for one of my PhD chapters. I’m new to doing TEAs so I was doing some reading and I came across this blurb in a text book: One w…

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## [\`entryfile\` in Project.toml](https://discourse.julialang.org/t/entryfile-in-project-toml/137532)

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**Author:** [@Kevin\_Gruhlke](https://discourse.julialang.org/u/Kevin_Gruhlke)\
**Replies:** 0\
**Last updated:** [June 9, 2026, 9:53pm UTC](https://discourse.julialang.org/t/entryfile-in-project-toml/137532 "2026-06-09T21:53:22Z")

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I recently discovered that if you have an entryfile entry in your package’s Project.toml file, you can put the package’s top-level module somewhere other than the typical src/Package.jl. This Project.toml, for example, w…

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## [How does licensing work for packages that wrap other-licensed binaries?](https://discourse.julialang.org/t/how-does-licensing-work-for-packages-that-wrap-other-licensed-binaries/104350)

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**Author:** [@bilderbuchi](https://discourse.julialang.org/u/bilderbuchi)\
**Replies:** 25\
**Last updated:** [June 9, 2026, 7:12pm UTC](https://discourse.julialang.org/t/how-does-licensing-work-for-packages-that-wrap-other-licensed-binaries/104350 "2026-06-09T19:12:24Z")

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The whole licensing thing is quite gnarly but important, it also affects other packages. For example, Trixi.jl has dependencies that are GPL (not LGPL, p4est and t8code), but claims MIT for itself – how does that work? …

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## [Starting to learn about optimization](https://discourse.julialang.org/t/starting-to-learn-about-optimization/137481)

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**Author:** [@Benny](https://discourse.julialang.org/u/Benny)\
**Replies:** 11\
**Last updated:** [June 9, 2026, 1:37pm UTC](https://discourse.julialang.org/t/starting-to-learn-about-optimization/137481 "2026-06-09T13:37:43Z")

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I’m considering tackling a problem that appears to have a fixed handful of cutoffs and a performance metric, so I started reading a bit about optimization with essentially zero initial knowledge (not sure ordinary least …

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## [If I clone a Julia package from git, should the local folder have the ending .jl?](https://discourse.julialang.org/t/if-i-clone-a-julia-package-from-git-should-the-local-folder-have-the-ending-jl/137522)

<div class="topic-metadata">

**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 11\
**Last updated:** [June 9, 2026, 12:44pm UTC](https://discourse.julialang.org/t/if-i-clone-a-julia-package-from-git-should-the-local-folder-have-the-ending-jl/137522 "2026-06-09T12:44:58Z")

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I am a bit confused: If I clone a package using the URL provided by GitHub (see picture) using git clone https://github.com/OpenSourceAWE/KiteUtils.jl.git I get a local folder named KiteUtils.jl. If I do \]dev Kit…

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## [Understanding dependency "extras"](https://discourse.julialang.org/t/understanding-dependency-extras/137513)

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**Author:** [@user664303](https://discourse.julialang.org/u/user664303)\
**Replies:** 6\
**Last updated:** [June 9, 2026, 11:09am UTC](https://discourse.julialang.org/t/understanding-dependency-extras/137513 "2026-06-09T11:09:42Z")

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I have a package with a Project.toml file. In the \[deps\] section are listed the core dependencies of the package. In the \[extras\] section are listed some extra dependencies that some test and example scripts need. In par…

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## [StructuralIdentifiability.jl for more complicated systems](https://discourse.julialang.org/t/structuralidentifiability-jl-for-more-complicated-systems/137381)

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**Author:** [@mark.garnett](https://discourse.julialang.org/u/mark.garnett)\
**Replies:** 5\
**Last updated:** [June 9, 2026, 9:37am UTC](https://discourse.julialang.org/t/structuralidentifiability-jl-for-more-complicated-systems/137381 "2026-06-09T09:37:58Z")

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Hi all, I am looking at StructuralIdentifiability.jl along with ModelingToolkit.jl to see what I can do with it. Ideally, I would use it to first find out which parameters in my models are actually identifiable, and then…

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## [Kaimon returning empty results](https://discourse.julialang.org/t/kaimon-returning-empty-results/137505)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 3\
**Last updated:** [June 9, 2026, 7:20am UTC](https://discourse.julialang.org/t/kaimon-returning-empty-results/137505 "2026-06-09T07:20:08Z")

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I keep getting these message: Hmm, the kaimon tool keeps returning empty results even when I use q=false. Let me check the session status and try a different approach. Working when using Kaimon.jl with Deepseek V4 fla…

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## [Setting Conda enviroment as Python executable for PyCall.jl](https://discourse.julialang.org/t/setting-conda-enviroment-as-python-executable-for-pycall-jl/125132)

<div class="topic-metadata">

**Author:** [@AntonioMoralesPerez](https://discourse.julialang.org/u/AntonioMoralesPerez)\
**Replies:** 2\
**Last updated:** [June 9, 2026, 6:40am UTC](https://discourse.julialang.org/t/setting-conda-enviroment-as-python-executable-for-pycall-jl/125132 "2026-06-09T06:40:17Z")

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I tried to change the Python executable on PyCall.jl but it doesn’t change after building. Some code showing my problem: ❯ julia \_ \_ \_ \_(\_)\_ | Documentation: https://docs.julialang.org (\_)…

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## [\[ANN\] Announcing ImageTally.jl — Interactive image counting and landmark placement for scientific images](https://discourse.julialang.org/t/ann-announcing-imagetally-jl-interactive-image-counting-and-landmark-placement-for-scientific-images/136705)

<div class="topic-metadata">

**Author:** [@alejandromerchan](https://discourse.julialang.org/u/alejandromerchan)\
**Replies:** 3\
**Last updated:** [June 9, 2026, 12:09am UTC](https://discourse.julialang.org/t/ann-announcing-imagetally-jl-interactive-image-counting-and-landmark-placement-for-scientific-images/136705 "2026-06-09T00:09:57Z")

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Hi Julia community! I’m excited to share ImageTally.jl, a package I’ve been working on for interactive counting and tagging of objects in scientific images. \[EDIT\] ImageTally.jl is now part of the General registry! T…

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