# General Usage

**URL:** https://discourse.julialang.org/c/usage/6.md?page=2

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

**Page:** 3

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## [XLSX cell format](https://discourse.julialang.org/t/xlsx-cell-format/113975)

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**Author:** [@monty](https://discourse.julialang.org/u/monty)\
**Replies:** 8\
**Last updated:** [August 30, 2026, 8:11am UTC](https://discourse.julialang.org/t/xlsx-cell-format/113975 "2026-08-30T08:11:49Z")

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I tried different approaches to specify a numerical format with 4 decimal places of all the cells in an Excel sheet generated using XLSX.jl. None of them worked. Any suggestions?

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## [XLSX.jl merging and formatting cells in Excel file?](https://discourse.julialang.org/t/xlsx-jl-merging-and-formatting-cells-in-excel-file/71719)

<div class="topic-metadata">

**Author:** [@programista](https://discourse.julialang.org/u/programista)\
**Replies:** 6\
**Last updated:** [August 30, 2026, 1:44am UTC](https://discourse.julialang.org/t/xlsx-jl-merging-and-formatting-cells-in-excel-file/71719 "2026-08-30T01:44:10Z")

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XLSX.jl How merging and formatting cells in Excel file? 1 How to combine/merge cells in a worksheet e.g. A1: C3 2. How to format table boundaries Paul

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## [How can I read an excel named table in Julia?](https://discourse.julialang.org/t/how-can-i-read-an-excel-named-table-in-julia/103984)

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**Author:** [@Emmanouil\_Bakirtzis](https://discourse.julialang.org/u/Emmanouil_Bakirtzis)\
**Replies:** 6\
**Last updated:** [August 30, 2026, 12:46am UTC](https://discourse.julialang.org/t/how-can-i-read-an-excel-named-table-in-julia/103984 "2026-08-30T00:46:17Z")

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Is there a way to read an excel named table in Julia? By “excel named table” I mean the object that is created in office excel you go insert → table (it is different that a named cell range) I have tried all julia exce…

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## [Excel doesn't recalculate after using XLSX package](https://discourse.julialang.org/t/excel-doesnt-recalculate-after-using-xlsx-package/70881)

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**Author:** [@Pahec97](https://discourse.julialang.org/u/Pahec97)\
**Replies:** 8\
**Last updated:** [August 29, 2026, 6:25pm UTC](https://discourse.julialang.org/t/excel-doesnt-recalculate-after-using-xlsx-package/70881 "2026-08-29T18:25:05Z")

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Hello, my problem is as follows: Having a excel file, which does something with the data, for example in figure 1. With XLSX, I rewrite the numbers n1 and n2, code in figure 2. The result of the excel formula doesn’t …

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## [Sending excel file as response is slow](https://discourse.julialang.org/t/sending-excel-file-as-response-is-slow/116705)

<div class="topic-metadata">

**Author:** [@Sandy45](https://discourse.julialang.org/u/Sandy45)\
**Replies:** 8\
**Last updated:** [August 29, 2026, 4:46pm UTC](https://discourse.julialang.org/t/sending-excel-file-as-response-is-slow/116705 "2026-08-29T16:46:40Z")

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I have an API which get csv file in the request and all I need to do is format and send the response as excel file. I am reading the data into dataframe and directly writing into excel. The issue is that writing data in…

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## [Package for OCR](https://discourse.julialang.org/t/package-for-ocr/133814)

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**Author:** [@CaoHua](https://discourse.julialang.org/u/CaoHua)\
**Replies:** 3\
**Last updated:** [August 28, 2026, 12:26am UTC](https://discourse.julialang.org/t/package-for-ocr/133814 "2026-08-28T00:26:06Z")

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Dears, Is there any up-to-date package for OCR. It seems Tesseract is not maintained and out of date. Thanks

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## [ArtificialAnalysis benchmarks: Major LLMs are roughly equivalent in most aspects, but Claude rules in Julia knowledge](https://discourse.julialang.org/t/artificialanalysis-benchmarks-major-llms-are-roughly-equivalent-in-most-aspects-but-claude-rules-in-julia-knowledge/138949)

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**Author:** [@NiclasMattsson](https://discourse.julialang.org/u/NiclasMattsson)\
**Replies:** 15\
**Last updated:** [August 27, 2026, 2:08pm UTC](https://discourse.julialang.org/t/artificialanalysis-benchmarks-major-llms-are-roughly-equivalent-in-most-aspects-but-claude-rules-in-julia-knowledge/138949 "2026-08-27T14:08:05Z")

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I just discovered that ArtificialAnalysis (major independent LLM benchmarking org) actually has a Julia-specific benchmark now, so I had to post it here: Some observations: This benchmark measures language knowledg…

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## [A few questions on exporting charts and formatted output to Excel](https://discourse.julialang.org/t/a-few-questions-on-exporting-charts-and-formatted-output-to-excel/56001)

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**Author:** [@yet\_another\_pythonis](https://discourse.julialang.org/u/yet_another_pythonis)\
**Replies:** 8\
**Last updated:** [August 27, 2026, 1:06pm UTC](https://discourse.julialang.org/t/a-few-questions-on-exporting-charts-and-formatted-output-to-excel/56001 "2026-08-27T13:06:57Z")

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I am trying to understand if I can move part of my code from Python to Julia, at least the part which cannot be optimised with Numba, and have a few questions on exporting data from Julia to Excel. This is crucial becau…

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## [Is the FileIO.jl ecosystem still alive?](https://discourse.julialang.org/t/is-the-fileio-jl-ecosystem-still-alive/133880)

<div class="topic-metadata">

**Author:** [@TimG](https://discourse.julialang.org/u/TimG)\
**Replies:** 5\
**Last updated:** [August 25, 2026, 11:10pm UTC](https://discourse.julialang.org/t/is-the-fileio-jl-ecosystem-still-alive/133880 "2026-08-25T23:10:32Z")

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I saw a reference to FileIO.jl in the thread announcing UFFFiles.jl and followed it up out of curiosity. Is FileIO.jl still in widespread use? I ask because, according to its registry, it officially supports Excel thro…

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## [Compiler mis-recognizes contiguous reinterpreted matrices?](https://discourse.julialang.org/t/compiler-mis-recognizes-contiguous-reinterpreted-matrices/138979)

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**Author:** [@bremez](https://discourse.julialang.org/u/bremez)\
**Replies:** 11\
**Last updated:** [August 25, 2026, 2:02pm UTC](https://discourse.julialang.org/t/compiler-mis-recognizes-contiguous-reinterpreted-matrices/138979 "2026-08-25T14:02:33Z")

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I am implementing an ODE to use with OrdinaryDiffEq. I am simultaneously evolving in time multiple quantities, which are combinations of vectors and matrices, some real and some complex. The approach I took has been to g…

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## [Workspace help](https://discourse.julialang.org/t/workspace-help/139038)

<div class="topic-metadata">

**Author:** [@obsidianjulua](https://discourse.julialang.org/u/obsidianjulua)\
**Replies:** 0\
**Last updated:** [August 25, 2026, 12:56pm UTC](https://discourse.julialang.org/t/workspace-help/139038 "2026-08-25T12:56:27Z")

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Im wondering if there is a way to systemd a julia process on startup that has a set of pkgs julia loads and from a terminal I can just fork into that julia instance and drop back out of it or even pipe to that instance. …

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## [Should global consts that are Refs be UPPER\_SNAKE\_CASE?](https://discourse.julialang.org/t/should-global-consts-that-are-refs-be-upper-snake-case/139024)

<div class="topic-metadata">

**Author:** [@Lilith](https://discourse.julialang.org/u/Lilith)\
**Replies:** 7\
**Last updated:** [August 25, 2026, 12:34pm UTC](https://discourse.julialang.org/t/should-global-consts-that-are-refs-be-upper-snake-case/139024 "2026-08-25T12:34:55Z")

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Should global consts that are Refs be UPPER\_SNAKE\_CASE? What do you think, and why? It seems that there is no consensus among existing code. The ecosystem is split: The docs say “follow Base” The 1.13-dev docs also…

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## [Which is the best open model for \[Julia\] coding? And practical, and still reasonably good](https://discourse.julialang.org/t/which-is-the-best-open-model-for-julia-coding-and-practical-and-still-reasonably-good/138640)

<div class="topic-metadata">

**Author:** [@Palli](https://discourse.julialang.org/u/Palli)\
**Replies:** 26\
**Last updated:** [August 25, 2026, 12:27pm UTC](https://discourse.julialang.org/t/which-is-the-best-open-model-for-julia-coding-and-practical-and-still-reasonably-good/138640 "2026-08-25T12:27:54Z")

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Continuing the discussion from Anthropic gave me 6 months of Claude Max for my contributions to the Julia ecosystem :slight\_smile:: I was just trying to point out an “LLM subscription” is not needed. Local models exist…

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## [Create \`BigInt\` directedly from MPZ pointer](https://discourse.julialang.org/t/create-bigint-directedly-from-mpz-pointer/138903)

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**Author:** [@Chrysoberyl](https://discourse.julialang.org/u/Chrysoberyl)\
**Replies:** 6\
**Last updated:** [August 25, 2026, 5:52am UTC](https://discourse.julialang.org/t/create-bigint-directedly-from-mpz-pointer/138903 "2026-08-25T05:52:11Z")

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I have some FFI code that interfaces with another library, and the target library has GNU multiprecision integers. Is it possible to create a BigInt directly from such a multiprecision integer pointer? The default constr…

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## [How to add dimensions in FlexUnits](https://discourse.julialang.org/t/how-to-add-dimensions-in-flexunits/138886)

<div class="topic-metadata">

**Author:** [@mjmat](https://discourse.julialang.org/u/mjmat)\
**Replies:** 13\
**Last updated:** [August 25, 2026, 2:05am UTC](https://discourse.julialang.org/t/how-to-add-dimensions-in-flexunits/138886 "2026-08-25T02:05:36Z")

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I would like to add a dimension (say, for example, Money) in FlexUnits, and define a base unit for it (say EUR). I have searched in the doc and online, but I can’t seem to find how to do that. Could someone point me to …

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## [How to engage all the cores of a CPU?](https://discourse.julialang.org/t/how-to-engage-all-the-cores-of-a-cpu/109827)

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**Author:** [@soldin](https://discourse.julialang.org/u/soldin)\
**Replies:** 5\
**Last updated:** [February 7, 2024, 6:38am UTC](https://discourse.julialang.org/t/how-to-engage-all-the-cores-of-a-cpu/109827 "2024-02-07T06:38:35Z")

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My cpu has 16 cores, but htops shows I’m using only one. Plz lemme know how can I put all of them to use.

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## [Using begin ... end in Julia](https://discourse.julialang.org/t/using-begin-end-in-julia/138963)

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**Author:** [@haroldnick0](https://discourse.julialang.org/u/haroldnick0)\
**Replies:** 3\
**Last updated:** [August 24, 2026, 11:19pm UTC](https://discourse.julialang.org/t/using-begin-end-in-julia/138963 "2026-08-24T23:19:54Z")

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Hello everyone, My name is Harold Castro, and I am a monitor at the Faculty of Communication and Language. I am participating in the Archivo 90 project, where we use Julia to process data and publish it in TiddlyHost. I…

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## [Order-agnostic dispatch](https://discourse.julialang.org/t/order-agnostic-dispatch/138932)

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**Author:** [@langestefan](https://discourse.julialang.org/u/langestefan)\
**Replies:** 27\
**Last updated:** [August 24, 2026, 9:53pm UTC](https://discourse.julialang.org/t/order-agnostic-dispatch/138932 "2026-08-24T21:53:00Z")

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Let’s say I have a function like: function f(x::TypeA, y::TypeB, z::TypeC) ... end For this particular function f it does not matter what the order of the arguments is, meaning f(x::TypeA, y::TypeB, z::TypeC) == f(:…

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## [Creating and exporting a tiddler from Julia in MultiWikis.jl](https://discourse.julialang.org/t/creating-and-exporting-a-tiddler-from-julia-in-multiwikis-jl/139025)

<div class="topic-metadata">

**Author:** [@haroldnick0](https://discourse.julialang.org/u/haroldnick0)\
**Replies:** 1\
**Last updated:** [August 24, 2026, 6:49pm UTC](https://discourse.julialang.org/t/creating-and-exporting-a-tiddler-from-julia-in-multiwikis-jl/139025 "2026-08-24T18:49:22Z")

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How can I create a tiddler from Julia within MultiWikis.jl, add it to the archivo90\_harold tiddlers file, and export it to the repository so that it can then be committed?

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## [Is it possible to avoid the \`TiddlyWikiModule\` prefix when using \`include("tiddlywiki.jl")\` in Pluto notebooks?](https://discourse.julialang.org/t/is-it-possible-to-avoid-the-tiddlywikimodule-prefix-when-using-include-tiddlywiki-jl-in-pluto-notebooks/139026)

<div class="topic-metadata">

**Author:** [@haroldnick0](https://discourse.julialang.org/u/haroldnick0)\
**Replies:** 1\
**Last updated:** [August 24, 2026, 6:40pm UTC](https://discourse.julialang.org/t/is-it-possible-to-avoid-the-tiddlywikimodule-prefix-when-using-include-tiddlywiki-jl-in-pluto-notebooks/139026 "2026-08-24T18:40:37Z")

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Is it possible to avoid the TiddlyWikiModule prefix when using include("tiddlywiki.jl") in Pluto notebooks? Currently, I have to call functions using TiddlyWikiModule.something(). I would like to know if I can make them…

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## [Julia can debug MLIR, kinda](https://discourse.julialang.org/t/julia-can-debug-mlir-kinda/138694)

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**Author:** [@obsidianjulua](https://discourse.julialang.org/u/obsidianjulua)\
**Replies:** 3\
**Last updated:** [August 23, 2026, 2:48pm UTC](https://discourse.julialang.org/t/julia-can-debug-mlir-kinda/138694 "2026-08-23T14:48:43Z")

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JIT’d thunks are debuggable in gdb, at source level Break on a mangled thunk name and gdb stops inside the emitted MLIR, by file and line, with list and disassemble /s working: cd ~/Desktop/Projects/RepliBuild.jl gd…

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## [Error while installing Juila packages on windows](https://discourse.julialang.org/t/error-while-installing-juila-packages-on-windows/138758)

<div class="topic-metadata">

**Author:** [@Aditya747S](https://discourse.julialang.org/u/Aditya747S)\
**Replies:** 14\
**Last updated:** [August 23, 2026, 1:31pm UTC](https://discourse.julialang.org/t/error-while-installing-juila-packages-on-windows/138758 "2026-08-23T13:31:34Z")

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I am installing julia packages on my windows machine and i am getting errros that go like this → \*.dll is either not designed to run on windows or contains an error. Try installing again using original installation med…

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## [NTuple type vs conversion inconsistency](https://discourse.julialang.org/t/ntuple-type-vs-conversion-inconsistency/139005)

<div class="topic-metadata">

**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 8\
**Last updated:** [August 23, 2026, 12:47pm UTC](https://discourse.julialang.org/t/ntuple-type-vs-conversion-inconsistency/139005 "2026-08-23T12:47:12Z")

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I find this a bit weird: julia\> x = (1, "a fish") (1, "a fish") julia\> x isa NTuple{2} false julia\> NTuple{2}(x) ≡ x true That is, T(x) ≡ x yet x is not a T.

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## [Packages blocking each other - strange case with DataFrames and PlotlyJS](https://discourse.julialang.org/t/packages-blocking-each-other-strange-case-with-dataframes-and-plotlyjs/138980)

<div class="topic-metadata">

**Author:** [@mjmat](https://discourse.julialang.org/u/mjmat)\
**Replies:** 4\
**Last updated:** [August 23, 2026, 4:06am UTC](https://discourse.julialang.org/t/packages-blocking-each-other-strange-case-with-dataframes-and-plotlyjs/138980 "2026-08-23T04:06:40Z")

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On a fresh 1.12.7 install, I am seeing this: If I add DataFrames first and then PlotlyJS, I get DataFrames 1.8.2 and PlotlyJS 0.15.0 (which is not up-to-date) If I add PlotlyJS and then DataFrames, I get PlotlyJS 0.18.…

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## [Debugger not working](https://discourse.julialang.org/t/debugger-not-working/138981)

<div class="topic-metadata">

**Author:** [@MathMan](https://discourse.julialang.org/u/MathMan)\
**Replies:** 7\
**Last updated:** [August 22, 2026, 5:28pm UTC](https://discourse.julialang.org/t/debugger-not-working/138981 "2026-08-22T17:28:55Z")

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I tried Julia again after some time using MATLAB. However, I cannot get debugging to work in VS Code. When I set a debug point, Julia pauses correctly, but when I remove the breakpoint, Julia will still pause at this bre…

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## [How to clean Julia logs](https://discourse.julialang.org/t/how-to-clean-julia-logs/138853)

<div class="topic-metadata">

**Author:** [@Alex1](https://discourse.julialang.org/u/Alex1)\
**Replies:** 6\
**Last updated:** [August 22, 2026, 4:31am UTC](https://discourse.julialang.org/t/how-to-clean-julia-logs/138853 "2026-08-22T04:31:46Z")

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How can I get clean logs? I want to hide compiling messages and make them use my log formatter not bypass it. Expected: conf | config {now: Date("2026-08-17")} opti | fit started Actual: conf | …

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## [Restricting the version of an indirect dependency](https://discourse.julialang.org/t/restricting-the-version-of-an-indirect-dependency/138971)

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**Author:** [@GHTaarn](https://discourse.julialang.org/u/GHTaarn)\
**Replies:** 9\
**Last updated:** [August 21, 2026, 9:30pm UTC](https://discourse.julialang.org/t/restricting-the-version-of-an-indirect-dependency/138971 "2026-08-21T21:30:31Z")

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The HTTP package is not in my project file, but I would like to restrict its version and upgrade everything else. I have not been able to find a direct way of doing this, so I upgraded everything, then added it to my pro…

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## [Test utilities in a Revise-friendly module](https://discourse.julialang.org/t/test-utilities-in-a-revise-friendly-module/138967)

<div class="topic-metadata">

**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 4\
**Last updated:** [August 21, 2026, 7:52pm UTC](https://discourse.julialang.org/t/test-utilities-in-a-revise-friendly-module/138967 "2026-08-21T19:52:37Z")

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For complicated packages, I use reasonably complex test utilities, on the level of 500-1k LoC. I would like to move them into their own module that I can track with Revise.jl. Eg in runtests.jl, I want to have using My…

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## [Preparing an antisymmetric matrix of normal numbers as efficiently as possible](https://discourse.julialang.org/t/preparing-an-antisymmetric-matrix-of-normal-numbers-as-efficiently-as-possible/138954)

<div class="topic-metadata">

**Author:** [@jibe](https://discourse.julialang.org/u/jibe)\
**Replies:** 11\
**Last updated:** [August 21, 2026, 1:25pm UTC](https://discourse.julialang.org/t/preparing-an-antisymmetric-matrix-of-normal-numbers-as-efficiently-as-possible/138954 "2026-08-21T13:25:01Z")

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My goal is to prepare a fully antisymmetric matrix of normal numbers, on a single thread, as efficiently as possible. After numerous manual attempts, here is the best version I could come up with: using BenchmarkTools c…

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## [Presentation of project](https://discourse.julialang.org/t/presentation-of-project/138962)

<div class="topic-metadata">

**Author:** [@haroldnick0](https://discourse.julialang.org/u/haroldnick0)\
**Replies:** 1\
**Last updated:** [August 21, 2026, 7:38am UTC](https://discourse.julialang.org/t/presentation-of-project/138962 "2026-08-21T07:38:23Z")

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Hello everyone, My name is Harold Castro. I am a monitor at the Faculty of Communication and Language. I am participating in a project where we are creating a data narrative using Julia. The project is related to the 9…

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