# General Usage

**URL:** https://discourse.julialang.org/c/usage/6.md?page=5

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**Page:** 6

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## [How to get name of Wi-Fi connection](https://discourse.julialang.org/t/how-to-get-name-of-wi-fi-connection/69299)

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**Author:** [@lubo](https://discourse.julialang.org/u/lubo)\
**Replies:** 4\
**Last updated:** [July 23, 2026, 9:08pm UTC](https://discourse.julialang.org/t/how-to-get-name-of-wi-fi-connection/69299 "2026-07-23T21:08:05Z")

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Hi there, I am using some code (jupyter notebook) on one machine but at two places (at home and at work). At work internet connection is behind proxy. When I set right proxy to HTTP.get function it is working just fine.…

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## [Kaimon stopped working](https://discourse.julialang.org/t/kaimon-stopped-working/138430)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 3\
**Last updated:** [July 23, 2026, 1:11pm UTC](https://discourse.julialang.org/t/kaimon-stopped-working/138430 "2026-07-23T13:11:59Z")

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I cannot use Kaimon any longer. Claudes says: The server is up, but the REPL eval bridge is not actually executing code. ping succeeds — the MCP server is healthy and one session is connected (ea21299c, V3Kite.jl). B…

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## [Custom Text example in Explanations fails for Julia LTS](https://discourse.julialang.org/t/custom-text-example-in-explanations-fails-for-julia-lts/138427)

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**Author:** [@devel-chm](https://discourse.julialang.org/u/devel-chm)\
**Replies:** 1\
**Last updated:** [July 23, 2026, 10:05am UTC](https://discourse.julialang.org/t/custom-text-example-in-explanations-fails-for-julia-lts/138427 "2026-07-23T10:05:12Z")

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This is for Julia LTS 1.10.10 on win11 and on linux and GLMakie v0.13.10. I just tried copy and pasting the code example from the Inspecting Data Explanations at Custom Text and got a bunch of errors like this: Error…

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## [Is there a way to tell at runtime if a struct field is atomic?](https://discourse.julialang.org/t/is-there-a-way-to-tell-at-runtime-if-a-struct-field-is-atomic/138377)

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**Author:** [@AwesomeQuest](https://discourse.julialang.org/u/AwesomeQuest)\
**Replies:** 6\
**Last updated:** [July 23, 2026, 5:36am UTC](https://discourse.julialang.org/t/is-there-a-way-to-tell-at-runtime-if-a-struct-field-is-atomic/138377 "2026-07-23T05:36:30Z")

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When one makes a struct like mutable struct Status @atomic st::Symbol # other fields end Is there a way to tell that st is a special field? Since fieldtypes gives no additional information. julia\> fieldtypes(S…

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## [GC60: Final Research Update](https://discourse.julialang.org/t/gc60-final-research-update/138391)

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**Author:** [@Claugo](https://discourse.julialang.org/u/Claugo)\
**Replies:** 7\
**Last updated:** [July 22, 2026, 8:11pm UTC](https://discourse.julialang.org/t/gc60-final-research-update/138391 "2026-07-22T20:11:22Z")

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Hi everyone, This will likely be my final post about the GC60 project. After four years of research, I believe I have reached the goal I set out to achieve. The program that reached this milestone is called GC60\_M60x16…

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## [Recommended way to interact with Pluto using AI?](https://discourse.julialang.org/t/recommended-way-to-interact-with-pluto-using-ai/138407)

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**Author:** [@Alec\_Loudenback](https://discourse.julialang.org/u/Alec_Loudenback)\
**Replies:** 2\
**Last updated:** [July 22, 2026, 7:45am UTC](https://discourse.julialang.org/t/recommended-way-to-interact-with-pluto-using-ai/138407 "2026-07-22T07:45:36Z")

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Disclaimer: I am not fully versed on the AI tooling. I love Pluto for it’s interactivity and share ability - I’d like to convert some lecture notes into an interactive Pluto notebook using AI, but Claude Code has troub…

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## [Is Flexible Julia Plugin Free for Students?](https://discourse.julialang.org/t/is-flexible-julia-plugin-free-for-students/138355)

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**Author:** [@NatMath](https://discourse.julialang.org/u/NatMath)\
**Replies:** 3\
**Last updated:** [July 19, 2026, 7:57pm UTC](https://discourse.julialang.org/t/is-flexible-julia-plugin-free-for-students/138355 "2026-07-19T19:57:55Z")

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Hi, I wanted to get some clarification about the Flexible Julia plugin for JetBrains IDEs. This post states that Though not entirely free, we still want everybody to participate. So the plugin should be free for open s…

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## [Wired: Python Is So Slow. Can Julia Solve the Two-Language Problem?](https://discourse.julialang.org/t/wired-python-is-so-slow-can-julia-solve-the-two-language-problem/138165)

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**Author:** [@apo383](https://discourse.julialang.org/u/apo383)\
**Replies:** 18\
**Last updated:** [July 19, 2026, 6:11pm UTC](https://discourse.julialang.org/t/wired-python-is-so-slow-can-julia-solve-the-two-language-problem/138165 "2026-07-19T18:11:48Z")

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A reasonable take on the two language problem including Julia in Wired.com. It’s behind a paywall but viewable for free upon sign-up. A few quotes of interest: Researchers prototype in slow, friendly Python but… rewrit…

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## [Why is \`fld1\` not named \`cld1\`?](https://discourse.julialang.org/t/why-is-fld1-not-named-cld1/138317)

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**Author:** [@rokke](https://discourse.julialang.org/u/rokke)\
**Replies:** 5\
**Last updated:** [July 19, 2026, 1:07am UTC](https://discourse.julialang.org/t/why-is-fld1-not-named-cld1/138317 "2026-07-19T01:07:14Z")

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question in title; fld1 seems much more similar to cld than fld: julia\> findall(!iszero, \[fld1(a,b)-cld(a,b) for a=-10000:.1:10000, b=\[-100:-1; 1:100\]\]) |\> length 0 julia\> findall(!iszero, \[fld1(a,b)-fld(a,b) for a=-10…

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## [General Registry update timeout problem](https://discourse.julialang.org/t/general-registry-update-timeout-problem/138245)

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**Author:** [@Jake](https://discourse.julialang.org/u/Jake)\
**Replies:** 4\
**Last updated:** [July 16, 2026, 5:33pm UTC](https://discourse.julialang.org/t/general-registry-update-timeout-problem/138245 "2026-07-16T17:33:56Z")

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On my Windows Machine I tried updating both Revise and JET. There is an interesting error that I cannot figure out. This is on Julia 1.12.6. It does not occur on my RPI 4 with the latest OS and Julia 1.12.6. You can …

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## [Load time of MTK models](https://discourse.julialang.org/t/load-time-of-mtk-models/138068)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 4\
**Last updated:** [July 16, 2026, 5:09pm UTC](https://discourse.julialang.org/t/load-time-of-mtk-models/138068 "2026-07-16T17:09:02Z")

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I am not happy with the TTFX of our MTK models (see: RamAirKites.jl). We already cache our simplified model after building it and use a custom system image. But nevertheless, the time to load a model from our cache is st…

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## [Documenter.jl and collapsible Markdown?](https://discourse.julialang.org/t/documenter-jl-and-collapsible-markdown/50898)

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**Author:** [@uwechsler](https://discourse.julialang.org/u/uwechsler)\
**Replies:** 4\
**Last updated:** [July 16, 2026, 2:15pm UTC](https://discourse.julialang.org/t/documenter-jl-and-collapsible-markdown/50898 "2026-07-16T14:15:52Z")

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Is it possible to have collapsible markdown elements in a documentation page (or even the navigation bar) created with Documenter? Here is an example: https://gist.github.com/joyrexus/16041f2426450e73f5df9391f7f7ae5f

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## [Slicing sparse and dense matrices and allocations](https://discourse.julialang.org/t/slicing-sparse-and-dense-matrices-and-allocations/137984)

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**Author:** [@Boris](https://discourse.julialang.org/u/Boris)\
**Replies:** 15\
**Last updated:** [July 16, 2026, 7:39am UTC](https://discourse.julialang.org/t/slicing-sparse-and-dense-matrices-and-allocations/137984 "2026-07-16T07:39:21Z")

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Hi, I am optimizing some old non-performance critical code of mine and run into a lot of allocations when using slicing operations with sparse and dense matrices. I distilled it to this MWE # ---------------------------…

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## [CUDA.jl only supports NVIDIA drivers for CUDA 11.x or 12.x (yours is for CUDA 13.0.0)](https://discourse.julialang.org/t/cuda-jl-only-supports-nvidia-drivers-for-cuda-11-x-or-12-x-yours-is-for-cuda-13-0-0/137803)

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**Author:** [@Cyan](https://discourse.julialang.org/u/Cyan)\
**Replies:** 5\
**Last updated:** [July 16, 2026, 1:53am UTC](https://discourse.julialang.org/t/cuda-jl-only-supports-nvidia-drivers-for-cuda-11-x-or-12-x-yours-is-for-cuda-13-0-0/137803 "2026-07-16T01:53:37Z")

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Hi, all. I have upgraded the CUDA several times, but still got: julia\> using CUDA ┌ Error: This version of CUDA.jl only supports NVIDIA drivers for CUDA 11.x or 12.x (yours is for CUDA 13.0.0) └ @ CUDA ~/.julia/packag…

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## [Julia nightly is now filling 2.08 GB of disk space](https://discourse.julialang.org/t/julia-nightly-is-now-filling-2-08-gb-of-disk-space/137939)

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**Author:** [@joa-quim](https://discourse.julialang.org/u/joa-quim)\
**Replies:** 17\
**Last updated:** [July 15, 2026, 11:00pm UTC](https://discourse.julialang.org/t/julia-nightly-is-now-filling-2-08-gb-of-disk-space/137939 "2026-07-15T23:00:08Z")

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For comparison 1.13 takes 1.08 GB

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## [Makie xtickalign for Axis3](https://discourse.julialang.org/t/makie-xtickalign-for-axis3/138241)

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**Author:** [@lucasmyers97](https://discourse.julialang.org/u/lucasmyers97)\
**Replies:** 0\
**Last updated:** [July 15, 2026, 8:27pm UTC](https://discourse.julialang.org/t/makie-xtickalign-for-axis3/138241 "2026-07-15T20:27:07Z")

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The 2D Axis class has an attribute xtickalign which controls whether the x-axis ticks point inwards or outwards. However, the 3D Axis3 class has no such attribute. How can I achieve a similar effect with an Axis3 object? …

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## [How to define MLIR types for Julia?](https://discourse.julialang.org/t/how-to-define-mlir-types-for-julia/134340)

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**Author:** [@obsidianjulua](https://discourse.julialang.org/u/obsidianjulua)\
**Replies:** 9\
**Last updated:** [July 15, 2026, 12:57pm UTC](https://discourse.julialang.org/t/how-to-define-mlir-types-for-julia/134340 "2026-07-15T12:57:12Z")

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Does anyone know if there are dialects made for julia and MLIR, not wrappers for MLIR dialects but compiled to MLIR that define julias types and ops for MLIR in C++ files. The problem: MLIR types need their storage class…

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## [Parallel Prime Sieving at High Magnitude with Julia (Project GC-60)](https://discourse.julialang.org/t/parallel-prime-sieving-at-high-magnitude-with-julia-project-gc-60/138200)

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**Author:** [@Claugo](https://discourse.julialang.org/u/Claugo)\
**Replies:** 4\
**Last updated:** [July 15, 2026, 8:38am UTC](https://discourse.julialang.org/t/parallel-prime-sieving-at-high-magnitude-with-julia-project-gc-60/138200 "2026-07-15T08:38:10Z")

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Hello everyone, I have shared with this forum two algorithms very dear to me: GC60\_M30x8 and GC60\_LRLN\_x8. These two algorithms have been combined, and the result highlights something fundamental: a different way of lo…

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## [Is there a nice way to specify sums or products with excluded indices?](https://discourse.julialang.org/t/is-there-a-nice-way-to-specify-sums-or-products-with-excluded-indices/138198)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 6\
**Last updated:** [July 15, 2026, 2:58am UTC](https://discourse.julialang.org/t/is-there-a-nice-way-to-specify-sums-or-products-with-excluded-indices/138198 "2026-07-15T02:58:04Z")

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Say I need to calculate something like y\_i = \\sum\_{i \\neq j} \\frac{1}{x\_i - x\_j}, Where the summation excludes identical indices. In Julia, the only way I know how to do this is with nested loops and an if statement, …

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## [How to handle errors and prevent script from crashing after](https://discourse.julialang.org/t/how-to-handle-errors-and-prevent-script-from-crashing-after/138168)

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**Author:** [@Mervyn\_Larrier](https://discourse.julialang.org/u/Mervyn_Larrier)\
**Replies:** 5\
**Last updated:** [July 14, 2026, 10:32am UTC](https://discourse.julialang.org/t/how-to-handle-errors-and-prevent-script-from-crashing-after/138168 "2026-07-14T10:32:09Z")

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Hi all. I’m writing a script to make a job a little bit easier, and it may be something I share with others so I’m trying to put a bit more care into making it. I’m not very familiar with error handling and I’m struggli…

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## [Controlling Blender from Julia using bpy and PythonCall.jl](https://discourse.julialang.org/t/controlling-blender-from-julia-using-bpy-and-pythoncall-jl/137707)

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**Author:** [@ChetanVardhan](https://discourse.julialang.org/u/ChetanVardhan)\
**Replies:** 3\
**Last updated:** [July 13, 2026, 7:04pm UTC](https://discourse.julialang.org/t/controlling-blender-from-julia-using-bpy-and-pythoncall-jl/137707 "2026-07-13T19:04:12Z")

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Recently I have been trying to use Blender from Julia. I have got a pretty good workflow using the rpyc package in Python. With this, we can import bpy in Julia using PythonCall.jl This is the Python script to be run i…

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## [How can I significantly speed up conditional Universal Differential Equation training?](https://discourse.julialang.org/t/how-can-i-significantly-speed-up-conditional-universal-differential-equation-training/138126)

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**Author:** [@NCCP](https://discourse.julialang.org/u/NCCP)\
**Replies:** 2\
**Last updated:** [July 13, 2026, 3:35pm UTC](https://discourse.julialang.org/t/how-can-i-significantly-speed-up-conditional-universal-differential-equation-training/138126 "2026-07-13T15:35:27Z")

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Hello, I am training a conditional Universal Differential Equation in Julia. This is a regular UDE with an additional trainable parameter as input that is specific for each particle (individual) in the dataset. The mod…

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## [Request for: examples of unhelpful selection of \`Closest candidates\` on a \`MethodError\`](https://discourse.julialang.org/t/request-for-examples-of-unhelpful-selection-of-closest-candidates-on-a-methoderror/138160)

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**Author:** [@adienes](https://discourse.julialang.org/u/adienes)\
**Replies:** 1\
**Last updated:** [July 13, 2026, 1:51pm UTC](https://discourse.julialang.org/t/request-for-examples-of-unhelpful-selection-of-closest-candidates-on-a-methoderror/138160 "2026-07-13T13:51:26Z")

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I’m experimenting with the shortlisting algorithm used to select the list of suggested methods when a MethodError is hit. As I’m sure many of us have experienced, sometimes the suggested methods are in fact not at all re…

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## [Working on the same project from WSL and Windows](https://discourse.julialang.org/t/working-on-the-same-project-from-wsl-and-windows/138154)

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**Author:** [@hros](https://discourse.julialang.org/u/hros)\
**Replies:** 2\
**Last updated:** [July 13, 2026, 10:28am UTC](https://discourse.julialang.org/t/working-on-the-same-project-from-wsl-and-windows/138154 "2026-07-13T10:28:10Z")

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I am developing a project which includes several packages with dependencies, working in Windows 11 (Powershell) I recently starting testing things from WSL, working on the same, mounting directory Now, the project work…

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## [Preview of multiple pages document in VS code using Typstry.jl](https://discourse.julialang.org/t/preview-of-multiple-pages-document-in-vs-code-using-typstry-jl/137974)

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**Author:** [@vzion](https://discourse.julialang.org/u/vzion)\
**Replies:** 5\
**Last updated:** [July 11, 2026, 8:37am UTC](https://discourse.julialang.org/t/preview-of-multiple-pages-document-in-vs-code-using-typstry-jl/137974 "2026-07-11T08:37:16Z")

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I’m looking for a way to deal with multiple pages preview when using Typstry.jl in VS code with the Julia extension (using PrettyTables typst backend in this example just for fun). # Init using Typstry, PrettyTables, Da…

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## [Method lookup in @generated functions](https://discourse.julialang.org/t/method-lookup-in-generated-functions/138047)

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**Author:** [@ettersi](https://discourse.julialang.org/u/ettersi)\
**Replies:** 12\
**Last updated:** [July 10, 2026, 10:51pm UTC](https://discourse.julialang.org/t/method-lookup-in-generated-functions/138047 "2026-07-10T22:51:55Z")

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This works as I would expect it to… julia\> f(x::Int) = "Int" f(x::Float64) = "Float64" @generated function g(x) if hasmethod(f, Tuple{x}) return :(f(x)) else …

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## [Read subset of columns from a CSV?](https://discourse.julialang.org/t/read-subset-of-columns-from-a-csv/138040)

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**Author:** [@mihalybaci](https://discourse.julialang.org/u/mihalybaci)\
**Replies:** 9\
**Last updated:** [July 10, 2026, 1:01pm UTC](https://discourse.julialang.org/t/read-subset-of-columns-from-a-csv/138040 "2026-07-10T13:01:51Z")

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I have a dataset that contains several thousand gzipped CSV files each with a few hundred thousand lines. Using CSV.jl and CSV.File takes about 4 seconds, which is really good, but for the number of files till means ~3 h…

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## [LRLN Sieve: High-magnitude prime screening in 54ms using Julia](https://discourse.julialang.org/t/lrln-sieve-high-magnitude-prime-screening-in-54ms-using-julia/138012)

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**Author:** [@Claugo](https://discourse.julialang.org/u/Claugo)\
**Replies:** 1\
**Last updated:** [July 10, 2026, 12:20pm UTC](https://discourse.julialang.org/t/lrln-sieve-high-magnitude-prime-screening-in-54ms-using-julia/138012 "2026-07-10T12:20:49Z")

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Hi everyone! Last week, I shared some tests with you regarding the divisor-centric model GC60\_M30x8\_suffix. Today, I am here to show you a theoretical shift in perspective that led to the creation of a purely dynamic ru…

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## [Precompilation of OrdinaryDiffEq fails](https://discourse.julialang.org/t/precompilation-of-ordinarydiffeq-fails/138036)

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**Author:** [@fritut08](https://discourse.julialang.org/u/fritut08)\
**Replies:** 5\
**Last updated:** [July 9, 2026, 11:48pm UTC](https://discourse.julialang.org/t/precompilation-of-ordinarydiffeq-fails/138036 "2026-07-09T23:48:51Z")

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Hello, I just noticed that adding the OrdinaryDiffEq to Julia fails at the precompilation step. It worked yesterday. But today, I cannot get it to work. It is not an issue of my machine as I have tested this on multiple…

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## [Trying Julia for Analytic combinatorics](https://discourse.julialang.org/t/trying-julia-for-analytic-combinatorics/103682)

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**Author:** [@fargolo](https://discourse.julialang.org/u/fargolo)\
**Replies:** 10\
**Last updated:** [July 9, 2026, 10:22pm UTC](https://discourse.julialang.org/t/trying-julia-for-analytic-combinatorics/103682 "2026-07-09T22:22:11Z")

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Hello, fellow colleagues in the Julia community. This question may not be a good fit for the Julia Discourse, but any help is appreciated. I was exploring Analytic Combinatorics (by Flajolet & Sedgewick). The part abou…

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