# Latest

**URL:** https://discourse.julialang.org/latest.md?page=136

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

**Page:** 137

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## [JuliaTokyo 2024 | Sat, Feb 3, 13:00](https://discourse.julialang.org/t/juliatokyo-2024-sat-feb-3-13-00/108612)

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**Author:** [@aviatesk](https://discourse.julialang.org/u/aviatesk)\
**Replies:** 3\
**Last updated:** [July 14, 2025, 1:07pm UTC](https://discourse.julialang.org/t/juliatokyo-2024-sat-feb-3-13-00/108612 "2025-07-14T13:07:00Z")

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We are excited to announce that after a three-year hiatus, the JuliaTokyo Meetup for Julia language users in the Tokyo area is set to take place on February 3rd. You can check out the event details at https://juliatokyo.…

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## [Generic implementation of Base.copy method for custom Types (using iternation over fieldnames?)](https://discourse.julialang.org/t/generic-implementation-of-base-copy-method-for-custom-types-using-iternation-over-fieldnames/130696)

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**Author:** [@pierre-haessig](https://discourse.julialang.org/u/pierre-haessig)\
**Replies:** 3\
**Last updated:** [July 14, 2025, 12:55pm UTC](https://discourse.julialang.org/t/generic-implementation-of-base-copy-method-for-custom-types-using-iternation-over-fieldnames/130696 "2025-07-14T12:55:11Z")

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Hello, This question has probably been answered several times, but oddly enough this morning I can’t get the proper answer. Context: I have a code base with several mutable custom parametric types (i.e. structures whic…

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## [Looking for more detailed documentation of \`PlotlyLight.jl\`](https://discourse.julialang.org/t/looking-for-more-detailed-documentation-of-plotlylight-jl/111009)

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**Author:** [@WuSiren](https://discourse.julialang.org/u/WuSiren)\
**Replies:** 4\
**Last updated:** [July 14, 2025, 10:07am UTC](https://discourse.julialang.org/t/looking-for-more-detailed-documentation-of-plotlylight-jl/111009 "2025-07-14T10:07:31Z")

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I found that the PlotlyLight package is very good and very useful to me, but its documentation is currently a bit brief (or I didn’t find it in the right place). Is there any more detailed instructions on its use? Thanks…

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## [Too much time on my hands](https://discourse.julialang.org/t/too-much-time-on-my-hands/117816)

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**Author:** [@Eben60](https://discourse.julialang.org/u/Eben60)\
**Replies:** 62\
**Last updated:** [July 14, 2025, 9:48am UTC](https://discourse.julialang.org/t/too-much-time-on-my-hands/117816 "2025-07-14T09:48:27Z")

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TL;DR An old(ish) guy looking for a meaningful application of his modest coding skills. whoami A semi-retired R&D engineer: “tangible things engineer”, not “software engineer”, with broad (not necessary deep) knowledge…

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## [Unexpected behaviour when using Pluto with StaticArrays](https://discourse.julialang.org/t/unexpected-behaviour-when-using-pluto-with-staticarrays/130690)

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**Author:** [@azeredo-e](https://discourse.julialang.org/u/azeredo-e)\
**Replies:** 2\
**Last updated:** [July 14, 2025, 7:36am UTC](https://discourse.julialang.org/t/unexpected-behaviour-when-using-pluto-with-staticarrays/130690 "2025-07-14T07:36:52Z")

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Hello everyone. I’ve found this weird behaviour when using StaticArrays within a begin … end block Pluto. I have this cell begin xᵢ = collect(range(0, 10, length=n)) |\> SVector{n} yᵢ = @SVector \[β₀ + β₁ \* i …

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## [Julia v1.12.0-rc1 is now available](https://discourse.julialang.org/t/julia-v1-12-0-rc1-is-now-available/130688)

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**Author:** [@ararslan](https://discourse.julialang.org/u/ararslan)\
**Replies:** 0\
**Last updated:** [July 14, 2025, 12:01am UTC](https://discourse.julialang.org/t/julia-v1-12-0-rc1-is-now-available/130688 "2025-07-14T00:01:51Z")

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Julia version 1.12.0-rc1, the first release candidate for the upcoming 1.12 series of releases, is now available. Binaries are available via JuliaUp and in the upcoming release section of https://julialang.org/downloads/ …

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## [How to detect that PackageCompiler fails?](https://discourse.julialang.org/t/how-to-detect-that-packagecompiler-fails/130686)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 3\
**Last updated:** [July 13, 2025, 8:35pm UTC](https://discourse.julialang.org/t/how-to-detect-that-packagecompiler-fails/130686 "2025-07-13T20:35:17Z")

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I am using a Bash script that calls package compiler. In Bash I execute: julia --project -e "include(\\"./test/create\_sys\_image.jl\\");" The create\_sys\_image.jl script contains the line: PackageCompiler.create\_sysimage…

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## [Why is broadcast of getproperty so slow?](https://discourse.julialang.org/t/why-is-broadcast-of-getproperty-so-slow/129970)

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**Author:** [@mwlidar](https://discourse.julialang.org/u/mwlidar)\
**Replies:** 13\
**Last updated:** [July 13, 2025, 5:53pm UTC](https://discourse.julialang.org/t/why-is-broadcast-of-getproperty-so-slow/129970 "2025-07-13T17:53:58Z")

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Looking on the following code I found that a simple broadcast of getproperty is about two to three times slower than a simple for loop implementation: struct MyStruct x::Float64 y::Float64 z::Float64 end #x…

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## [Why is LoopVectorization deprecated?](https://discourse.julialang.org/t/why-is-loopvectorization-deprecated/109547)

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**Author:** [@wujinq](https://discourse.julialang.org/u/wujinq)\
**Replies:** 141\
**Last updated:** [July 13, 2025, 3:58pm UTC](https://discourse.julialang.org/t/why-is-loopvectorization-deprecated/109547 "2025-07-13T15:58:02Z")

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In the README file of JuliaSIMD/LoopVectorization.jl: Macro(s) for vectorizing loops. (github.com) it is clearly stated that the package is deprecated for Julia 1.11 and newer versions, without any explanation. Anyone kn…

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## [Some Julia growth/usage stats](https://discourse.julialang.org/t/some-julia-growth-usage-stats/112547)

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**Author:** [@StefanKarpinski](https://discourse.julialang.org/u/StefanKarpinski)\
**Replies:** 42\
**Last updated:** [July 13, 2025, 2:47pm UTC](https://discourse.julialang.org/t/some-julia-growth-usage-stats/112547 "2025-07-13T14:47:46Z")

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There’s been a couple of posts recently by certain people bemoaning Julia’s lack of popularity/usage/growth. Which I find confusing—where is this impression of lack of usage coming from? It’s certainly not the impression…

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## [Fastest way to calculate eigenvectors of 4x4 matrix](https://discourse.julialang.org/t/fastest-way-to-calculate-eigenvectors-of-4x4-matrix/125174)

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**Author:** [@Xu\_Shan](https://discourse.julialang.org/u/Xu_Shan)\
**Replies:** 21\
**Last updated:** [July 13, 2025, 2:06pm UTC](https://discourse.julialang.org/t/fastest-way-to-calculate-eigenvectors-of-4x4-matrix/125174 "2025-07-13T14:06:05Z")

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Hi guys, I am trying to run a model which simulates a long time series. For each time step, I need to solve the Eigen values and Eigen vectors for one matrix. This matrix is only 4\*4, but the computation time is importa…

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## [Installing Pluto Fails](https://discourse.julialang.org/t/installing-pluto-fails/130681)

<div class="topic-metadata">

**Author:** [@two\_four\_six](https://discourse.julialang.org/u/two_four_six)\
**Replies:** 6\
**Last updated:** [July 13, 2025, 11:11am UTC](https://discourse.julialang.org/t/installing-pluto-fails/130681 "2025-07-13T11:11:27Z")

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Following the Github ‘Installing Pluto’ recommendation I get this error: julia\> import Pluto │ Attempted to find missing packages in package registries but no registries are installed. └ Use package mode to install a …

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## [Franklin.jl: when Julia scripting with HTML, how can I get its insertions to work?](https://discourse.julialang.org/t/franklin-jl-when-julia-scripting-with-html-how-can-i-get-its-insertions-to-work/130682)

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**Author:** [@fusion809](https://discourse.julialang.org/u/fusion809)\
**Replies:** 2\
**Last updated:** [July 13, 2025, 11:17am UTC](https://discourse.julialang.org/t/franklin-jl-when-julia-scripting-with-html-how-can-i-get-its-insertions-to-work/130682 "2025-07-13T11:17:35Z")

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I have this in my utils.jl file: function resolve\_inserts(html::String)::String insert\_pattern = r"\\{\\{\\s\*insert\\s+(\[a-zA-Z0-9\_./\\-\]+)\\s\*\\}\\}" return replace(html, insert\_pattern =\> s -\> begin filename …

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## [How would I view/use Number Base from 2 to 256](https://discourse.julialang.org/t/how-would-i-view-use-number-base-from-2-to-256/129412)

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**Author:** [@two\_four\_six](https://discourse.julialang.org/u/two_four_six)\
**Replies:** 4\
**Last updated:** [July 13, 2025, 10:47am UTC](https://discourse.julialang.org/t/how-would-i-view-use-number-base-from-2-to-256/129412 "2025-07-13T10:47:14Z")

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Data at rest is binary. When I read a file, it is presented in an output, like print() in hex. Julia converts the binary state of the file and outputs the hex info. This isn’t the behavior I need. I would like to take …

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## [Embedding Julia in Windows](https://discourse.julialang.org/t/embedding-julia-in-windows/76693)

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**Author:** [@DanielP](https://discourse.julialang.org/u/DanielP)\
**Replies:** 1\
**Last updated:** [July 12, 2025, 7:06pm UTC](https://discourse.julialang.org/t/embedding-julia-in-windows/76693 "2025-07-12T19:06:21Z")

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Hi, I have tried to call my tested Julia function from C program on Windows 10. I am using gcc compiler (minGW). When I compile, link and launch my program from the IDE (I am using Code::Blocks IDE) it works fine. The co…

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## [Excessive memory usage when adding millions of variables to a JuMP Model](https://discourse.julialang.org/t/excessive-memory-usage-when-adding-millions-of-variables-to-a-jump-model/130163)

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**Author:** [@Walter](https://discourse.julialang.org/u/Walter)\
**Replies:** 12\
**Last updated:** [July 12, 2025, 3:28pm UTC](https://discourse.julialang.org/t/excessive-memory-usage-when-adding-millions-of-variables-to-a-jump-model/130163 "2025-07-12T15:28:52Z")

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Hi, I’m solving a large MIP using JuMP + Gurobi. My approach dynamically adds variables to the model (similar to column generation). In some cases, up to 10 000 000 variables are added within a single step. During this …

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## [A weird issue while adding packages (corrupted double-linked list or Segmentation)](https://discourse.julialang.org/t/a-weird-issue-while-adding-packages-corrupted-double-linked-list-or-segmentation/130629)

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**Author:** [@SolaireZ](https://discourse.julialang.org/u/SolaireZ)\
**Replies:** 12\
**Last updated:** [July 12, 2025, 2:58pm UTC](https://discourse.julialang.org/t/a-weird-issue-while-adding-packages-corrupted-double-linked-list-or-segmentation/130629 "2025-07-12T14:58:31Z")

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I was just trying install FUSE with (On ubuntu 22.04 LTS) using Pkg Pkg.Registry.add(RegistrySpec(url="https://github.com/ProjectTorreyPines/FuseRegistry.jl.git")) Pkg.Registry.add("General") Pkg.add("FUSE") I installe…

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## [Dealing with geospatial affine transformations](https://discourse.julialang.org/t/dealing-with-geospatial-affine-transformations/130513)

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**Author:** [@technocrat](https://discourse.julialang.org/u/technocrat)\
**Replies:** 9\
**Last updated:** [July 12, 2025, 1:06pm UTC](https://discourse.julialang.org/t/dealing-with-geospatial-affine-transformations/130513 "2025-07-12T13:06:45Z")

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My goal is to produce a map like the attachment, in which the affine adjustments were done in Postgres/PostGIS, within Julia. This is a standard cartographic convention for maps of the United States. The attached ma…

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## [The Strategic Connection Between JuliaHub, Dyad and the Julia Open Source Community](https://discourse.julialang.org/t/the-strategic-connection-between-juliahub-dyad-and-the-julia-open-source-community/130573)

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**Author:** [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Replies:** 2\
**Last updated:** [July 12, 2025, 11:18am UTC](https://discourse.julialang.org/t/the-strategic-connection-between-juliahub-dyad-and-the-julia-open-source-community/130573 "2025-07-12T11:18:17Z")

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A lot of people ask, what does JuliaHub do and what does this mean for open source? We took the time to detail how JuliaHub is a commercial entity that produces products like Dyad, but importantly how this connects to an…

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## [Allow use of named-argument syntax for positional arguments?](https://discourse.julialang.org/t/allow-use-of-named-argument-syntax-for-positional-arguments/5287)

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**Author:** [@nickeubank](https://discourse.julialang.org/u/nickeubank)\
**Replies:** 54\
**Last updated:** [July 12, 2025, 5:59am UTC](https://discourse.julialang.org/t/allow-use-of-named-argument-syntax-for-positional-arguments/5287 "2025-07-12T05:59:22Z")

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I’m fond of naming my arguments for readability. Is there a structural reason that one cannot use the names of arguments when the function defines they as positional? In other words, is there a technical reason I can’t d…

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## [Franklin.jl: iterating over elements of a vector in HTML](https://discourse.julialang.org/t/franklin-jl-iterating-over-elements-of-a-vector-in-html/130644)

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**Author:** [@fusion809](https://discourse.julialang.org/u/fusion809)\
**Replies:** 4\
**Last updated:** [July 12, 2025, 5:41am UTC](https://discourse.julialang.org/t/franklin-jl-iterating-over-elements-of-a-vector-in-html/130644 "2025-07-12T05:41:47Z")

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This is my Franklin.jl-powered website. I have several mathematical simulation pages and while they do differ in some ways, a lot of their code is more or less shared and I am trying to reduce the redundancy between them…

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## [How to setup Github CI for monorepo?](https://discourse.julialang.org/t/how-to-setup-github-ci-for-monorepo/130655)

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**Author:** [@jling](https://discourse.julialang.org/u/jling)\
**Replies:** 0\
**Last updated:** [July 11, 2025, 9:01pm UTC](https://discourse.julialang.org/t/how-to-setup-github-ci-for-monorepo/130655 "2025-07-11T21:01:36Z")

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one approach seems to have runtests.jl essentially detect what needs to be run by ENV, but seems to be complicated. For repos that really have just 1-2 sub-package, is there a simpler way?

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## [Solving Large Sparse SPD Linear Systems with Hybrid Direct-Iterative Methods in Julia](https://discourse.julialang.org/t/solving-large-sparse-spd-linear-systems-with-hybrid-direct-iterative-methods-in-julia/130650)

<div class="topic-metadata">

**Author:** [@pitsianis](https://discourse.julialang.org/u/pitsianis)\
**Replies:** 1\
**Last updated:** [July 11, 2025, 8:50pm UTC](https://discourse.julialang.org/t/solving-large-sparse-spd-linear-systems-with-hybrid-direct-iterative-methods-in-julia/130650 "2025-07-11T20:50:39Z")

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I’m exploring the idea of solving large, sparse symmetric positive definite (SPD) linear systems using hybrid approaches that combine direct methods (e.g., Cholesky) with iterative methods (e.g., CG with incomplete Chole…

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## [Find decimal year from time](https://discourse.julialang.org/t/find-decimal-year-from-time/126670)

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**Author:** [@Ju\_ska](https://discourse.julialang.org/u/Ju_ska)\
**Replies:** 7\
**Last updated:** [March 11, 2025, 9:15am UTC](https://discourse.julialang.org/t/find-decimal-year-from-time/126670 "2025-03-11T09:15:45Z")

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Hi, I’ve searched for something in libraries like Dates and AstroTime, but maybe missed it as I’m surprised not to find it. I would like to find the decimal time from a date, hour, minute, second, e.g.: DateTime(2018,…

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## [LoadError: UndefVarError: \`initial\_params\` not defined in \`Flux\`](https://discourse.julialang.org/t/loaderror-undefvarerror-initial-params-not-defined-in-flux/130641)

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**Author:** [@SANTOSH\_KARRA](https://discourse.julialang.org/u/SANTOSH_KARRA)\
**Replies:** 2\
**Last updated:** [July 11, 2025, 6:32pm UTC](https://discourse.julialang.org/t/loaderror-undefvarerror-initial-params-not-defined-in-flux/130641 "2025-07-11T18:32:02Z")

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ERROR: LoadError: UndefVarError: initial\_params not defined in Flux Suggestion: check for spelling errors or missing imports. Stacktrace: \[1\] getproperty(x::Module, f::Symbol) @ Base .\\Base.jl:42 \[2\] top-level scope …

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## [Common API for \`Integrate\`. IntegrationBase](https://discourse.julialang.org/t/common-api-for-integrate-integrationbase/130637)

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**Author:** [@misha\_mikhasenko](https://discourse.julialang.org/u/misha_mikhasenko)\
**Replies:** 5\
**Last updated:** [July 11, 2025, 6:30pm UTC](https://discourse.julialang.org/t/common-api-for-integrate-integrationbase/130637 "2025-07-11T18:30:02Z")

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I’ve observed a conflict of different packages exporting integrate (e.g.). It would be nice to have IntegrationBase with API. Currently, the ecosystem is diverse. Overview of methods integrate is exported by Polynomi…

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## [Retrieving shortest paths from Graphs.jl](https://discourse.julialang.org/t/retrieving-shortest-paths-from-graphs-jl/130539)

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**Author:** [@GRASP\_lover123](https://discourse.julialang.org/u/GRASP_lover123)\
**Replies:** 11\
**Last updated:** [July 11, 2025, 5:26pm UTC](https://discourse.julialang.org/t/retrieving-shortest-paths-from-graphs-jl/130539 "2025-07-11T17:26:57Z")

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Hi everybody, I’m using Graphs.jl to get shortest paths using the a\* function, which give the list of edges in the shortest path from one node to another. Recently I’ve needed to get the shortest paths from all nodes to…

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## [What's in your @?](https://discourse.julialang.org/t/whats-in-your/129530)

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**Author:** [@NonDairyNeutrino](https://discourse.julialang.org/u/NonDairyNeutrino)\
**Replies:** 19\
**Last updated:** [July 11, 2025, 2:01pm UTC](https://discourse.julialang.org/t/whats-in-your/129530 "2025-07-11T14:01:43Z")

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Simple enough, what’s in your default environment? Could be fun to guess what everyone primarily does based only on their @s. What do you think I do? julia -e "Pkg.status()" Status \`~/.julia/environments/v1.11/Projec…

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## [Dispatch on specific Unitful unit](https://discourse.julialang.org/t/dispatch-on-specific-unitful-unit/124774)

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**Author:** [@Nathan\_Boyer](https://discourse.julialang.org/u/Nathan_Boyer)\
**Replies:** 7\
**Last updated:** [July 11, 2025, 1:32pm UTC](https://discourse.julialang.org/t/dispatch-on-specific-unitful-unit/124774 "2025-07-11T13:32:11Z")

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Continuing the discussion from Unitful dispatch: I want to dispatch specifically on u"inch". What am I missing? In this MWE, I want mm(1), mm(1u"inch"), and mm(1.0u"inch") to all return 25.4 mm. using Unitful InchType…

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## [How to make parallel within the parallel?](https://discourse.julialang.org/t/how-to-make-parallel-within-the-parallel/130642)

<div class="topic-metadata">

**Author:** [@Xu\_Shan](https://discourse.julialang.org/u/Xu_Shan)\
**Replies:** 0\
**Last updated:** [July 11, 2025, 1:22pm UTC](https://discourse.julialang.org/t/how-to-make-parallel-within-the-parallel/130642 "2025-07-11T13:22:41Z")

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Hi Guys, Right now I am running a model optimization to optimize one set of parameter for several sites (in total 47 sites). Site computation is independent with each other. I am using CMAES to minimise the cost. For no…

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