# Latest

**URL:** https://discourse.julialang.org/latest.md?page=1737

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

**Page:** 1738

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## [Julia Channels in Python](https://discourse.julialang.org/t/julia-channels-in-python/40180)

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**Author:** [@Impressium](https://discourse.julialang.org/u/Impressium)\
**Replies:** 1\
**Last updated:** [May 26, 2020, 1:34pm UTC](https://discourse.julialang.org/t/julia-channels-in-python/40180 "2020-05-26T13:34:05Z")

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Hey Community :slight\_smile: I wrote a module in Julia and want to use it in Python. The module gets data from a TCP connection and puts it in a channel. The user of this module can than take one element as soon as it i…

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## [GR.jl Open two figures](https://discourse.julialang.org/t/gr-jl-open-two-figures/7326)

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**Author:** [@tobias.knopp](https://discourse.julialang.org/u/tobias.knopp)\
**Replies:** 9\
**Last updated:** [May 26, 2020, 1:07pm UTC](https://discourse.julialang.org/t/gr-jl-open-two-figures/7326 "2020-05-26T13:07:03Z")

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Hi, I am using GR.jl and would like to open two figures. I also need to toggle between them in order to show changes of real-time data. In PyPlot.jl I would use figure(1) and figure(2) to switch between the figures. Th…

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## [\[ANN\] RandomizedPropertyTests.jl](https://discourse.julialang.org/t/ann-randomizedpropertytests-jl/40178)

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**Author:** [@hwjsnc](https://discourse.julialang.org/u/hwjsnc)\
**Replies:** 3\
**Last updated:** [May 26, 2020, 11:00am UTC](https://discourse.julialang.org/t/ann-randomizedpropertytests-jl/40178 "2020-05-26T11:00:31Z")

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RandomizedPropertyTest.jl is a test framework for testing program properties with random (as well as special pre-defined) inputs, inspired by QuickCheck . Sources can be found at Lukas Himbert / RandomizedPropertyTest.j…

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## [Inverse of symmetric Matrix does not give proper output](https://discourse.julialang.org/t/inverse-of-symmetric-matrix-does-not-give-proper-output/40173)

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**Author:** [@morkip](https://discourse.julialang.org/u/morkip)\
**Replies:** 3\
**Last updated:** [May 26, 2020, 10:47am UTC](https://discourse.julialang.org/t/inverse-of-symmetric-matrix-does-not-give-proper-output/40173 "2020-05-26T10:47:00Z")

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I am trying to achieve better performance in my Matrix Inversion by tagging the Matrix as ‘symmetric’. The Matrix is medium sized (200x200) Parameters and complex valued (it is indeed symmetric and not hermitian). The n…

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## [@memoize macro](https://discourse.julialang.org/t/memoize-macro/39968)

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**Author:** [@A.U.M](https://discourse.julialang.org/u/A.U.M)\
**Replies:** 3\
**Last updated:** [May 26, 2020, 8:01am UTC](https://discourse.julialang.org/t/memoize-macro/39968 "2020-05-26T08:01:35Z")

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Hello. I am working on implement macro @memoize. it works well but i want to generalize it and make it more robust (still for functions with a single argument) by checking whether the argument and return types are specif…

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## [Out of order branch execution prediction slower?](https://discourse.julialang.org/t/out-of-order-branch-execution-prediction-slower/40092)

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**Author:** [@angelv](https://discourse.julialang.org/u/angelv)\
**Replies:** 17\
**Last updated:** [May 26, 2020, 7:37am UTC](https://discourse.julialang.org/t/out-of-order-branch-execution-prediction-slower/40092 "2020-05-26T07:37:23Z")

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Hi, following the Parallel Computing course in JuliaAcademy I wanted to try the hardware effects of branch prediction (Serial Performance | JuliaAcademy, time about 33:00). The idea is that in the second case the data …

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## [Some more basic plots with Plots.jl for illustrating calculous and linear algebra books, but can we write better plotting codes?](https://discourse.julialang.org/t/some-more-basic-plots-with-plots-jl-for-illustrating-calculous-and-linear-algebra-books-but-can-we-write-better-plotting-codes/40168)

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**Author:** [@HaoLi111](https://discourse.julialang.org/u/HaoLi111)\
**Replies:** 0\
**Last updated:** [May 26, 2020, 6:40am UTC](https://discourse.julialang.org/t/some-more-basic-plots-with-plots-jl-for-illustrating-calculous-and-linear-algebra-books-but-can-we-write-better-plotting-codes/40168 "2020-05-26T06:40:52Z")

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I started re-making the plots to illustrate some mathematical ideas. The repo is for illustrating the basic ideas through easily created plots and animations and the use and tuning of parameters of Plots.jl This is le…

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## [Invoking "remote" variables in remote computations](https://discourse.julialang.org/t/invoking-remote-variables-in-remote-computations/40134)

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**Author:** [@martincornejo](https://discourse.julialang.org/u/martincornejo)\
**Replies:** 1\
**Last updated:** [May 26, 2020, 5:58am UTC](https://discourse.julialang.org/t/invoking-remote-variables-in-remote-computations/40134 "2020-05-26T05:58:43Z")

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Let’s suppose in a distributed computing task, for each worker or process we’d like to compute some data (for example in the form of a matrix A) which might or might not be unique for that worker and will be useful later…

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## [Property Inheritance Pattern](https://discourse.julialang.org/t/property-inheritance-pattern/40101)

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**Author:** [@virtualgraham](https://discourse.julialang.org/u/virtualgraham)\
**Replies:** 20\
**Last updated:** [May 26, 2020, 3:09am UTC](https://discourse.julialang.org/t/property-inheritance-pattern/40101 "2020-05-26T03:09:36Z")

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As of version 1.4 Julia does not support property inheritance. However, many other languages such as Python do support inheritance and porting libraries from these languages becomes difficult. I am proposing an informal…

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## [How to plot and save figure, by running code on unix server](https://discourse.julialang.org/t/how-to-plot-and-save-figure-by-running-code-on-unix-server/40109)

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**Author:** [@BMval](https://discourse.julialang.org/u/BMval)\
**Replies:** 6\
**Last updated:** [May 26, 2020, 2:59am UTC](https://discourse.julialang.org/t/how-to-plot-and-save-figure-by-running-code-on-unix-server/40109 "2020-05-26T02:59:45Z")

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How to plot and save figure, by running code on the Unix server. Thank you in advance.

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## [Idea: scope- (rather than type-) centric composable optimizations](https://discourse.julialang.org/t/idea-scope-rather-than-type-centric-composable-optimizations/40118)

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**Author:** [@hessammehr](https://discourse.julialang.org/u/hessammehr)\
**Replies:** 2\
**Last updated:** [May 26, 2020, 2:35am UTC](https://discourse.julialang.org/t/idea-scope-rather-than-type-centric-composable-optimizations/40118 "2020-05-26T02:35:54Z")

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I was inspired by this paper and the following observations to sketch out a model of compositional optimizations that I thought I would share with the community. Simple interpretation can be faster than Julia’s per-fun…

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## [Jump processes on networks](https://discourse.julialang.org/t/jump-processes-on-networks/40163)

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**Author:** [@erlebach1](https://discourse.julialang.org/u/erlebach1)\
**Replies:** 0\
**Last updated:** [May 26, 2020, 1:49am UTC](https://discourse.julialang.org/t/jump-processes-on-networks/40163 "2020-05-26T01:49:35Z")

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Does anybody know of anyJulia examples of Jump processes on networks, perhaps using the Gillespie approach? Thanks. Gordon

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## [\[ANN\] PkgTemplates 0.7](https://discourse.julialang.org/t/ann-pkgtemplates-0-7/40161)

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**Author:** [@christopher-dG](https://discourse.julialang.org/u/christopher-dG)\
**Replies:** 2\
**Last updated:** [May 26, 2020, 12:31am UTC](https://discourse.julialang.org/t/ann-pkgtemplates-0-7/40161 "2020-05-26T00:31:18Z")

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Hello friends, if you’ve been watching PkgTemplates development at all you may know that it hasn’t had a new release in a very long time. The package has basically been rewritten from the ground up, and getting things st…

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## [Why isn't 10^6 evaluated at compile time?](https://discourse.julialang.org/t/why-isnt-10-6-evaluated-at-compile-time/40124)

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**Author:** [@robsmith11](https://discourse.julialang.org/u/robsmith11)\
**Replies:** 21\
**Last updated:** [May 25, 2020, 11:12pm UTC](https://discourse.julialang.org/t/why-isnt-10-6-evaluated-at-compile-time/40124 "2020-05-25T23:12:29Z")

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I was optimizing some code in the hot path and was surprised to see that constants written as 10^6 were being evaluated at run-time. Isn’t evaluating constants like this one of the simplest optimizations? Why wouldn’t …

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## [\[ANN\]: Turing 0.13.0 - MLE/MAP and prediction](https://discourse.julialang.org/t/ann-turing-0-13-0-mle-map-and-prediction/40033)

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**Author:** [@cpfiffer](https://discourse.julialang.org/u/cpfiffer)\
**Replies:** 6\
**Last updated:** [May 25, 2020, 10:48pm UTC](https://discourse.julialang.org/t/ann-turing-0-13-0-mle-map-and-prediction/40033 "2020-05-25T22:48:12Z")

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We’re happy to announce Turing 0.13.0, which brings a suite of much-needed features. I am particularly happy about this one because it is a feature-rich release, which is always fun. Maximum likelihood and maximum a pos…

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## [Full border with ticks](https://discourse.julialang.org/t/full-border-with-ticks/25060)

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**Author:** [@Milo\_Guerrero](https://discourse.julialang.org/u/Milo_Guerrero)\
**Replies:** 11\
**Last updated:** [May 25, 2020, 10:03pm UTC](https://discourse.julialang.org/t/full-border-with-ticks/25060 "2020-05-25T22:03:46Z")

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Hello, Im a using the plots library with gr(), I’ve tried to obtain a graphic with full border and ticks but I don’t know how, my last try is: plot(equation, markershape = :hexagon,xticks = ( \[0:5:100;\], \["\\\\theta", "2\\…

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## [RDE versus SDE](https://discourse.julialang.org/t/rde-versus-sde/40150)

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**Author:** [@erlebach](https://discourse.julialang.org/u/erlebach)\
**Replies:** 7\
**Last updated:** [May 25, 2020, 9:29pm UTC](https://discourse.julialang.org/t/rde-versus-sde/40150 "2020-05-25T21:29:57Z")

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What is the difference between a Random Differential Equation and a Stochastic Differential Equation? I read the documentation of DifferentialEquations.jl, but I cannot wrap my head around it. Thanks. Gordon

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## [Is multiple dispatch the same as function overloading?](https://discourse.julialang.org/t/is-multiple-dispatch-the-same-as-function-overloading/4145)

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**Author:** [@Varun\_Varghese](https://discourse.julialang.org/u/Varun_Varghese)\
**Replies:** 19\
**Last updated:** [May 25, 2020, 9:04pm UTC](https://discourse.julialang.org/t/is-multiple-dispatch-the-same-as-function-overloading/4145 "2020-05-25T21:04:33Z")

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Isn’t multiple dispatch the same as function overloading?

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## [lhe/Biofast benchmark | FASTQ parsing \[Julia,Nim,Crystal,Python,...\]](https://discourse.julialang.org/t/lhe-biofast-benchmark-fastq-parsing-julia-nim-crystal-python/39747)

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**Author:** [@ImreSamu](https://discourse.julialang.org/u/ImreSamu)\
**Replies:** 54\
**Last updated:** [May 25, 2020, 8:17pm UTC](https://discourse.julialang.org/t/lhe-biofast-benchmark-fastq-parsing-julia-nim-crystal-python/39747 "2020-05-25T20:17:43Z")

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from the community news: " Biofast is a small benchmark for evaluating the performance of programming languages and implementations on a few common tasks in the field of Bioinformatics. It currently includes two benchma…

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## [Very slow execution time](https://discourse.julialang.org/t/very-slow-execution-time/40141)

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**Author:** [@Adamszk](https://discourse.julialang.org/u/Adamszk)\
**Replies:** 4\
**Last updated:** [May 25, 2020, 7:50pm UTC](https://discourse.julialang.org/t/very-slow-execution-time/40141 "2020-05-25T19:50:45Z")

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Hi, I just build Julia 1.4.2. (I could not install prebuild). I managed to run Julia Kernel in jupyter. To test OrdinaryDIffEq tutorial, I run introductory page. I noticed that Julia takes like 2-4 seconds to print …

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## [Julia v1.4.2 has been released](https://discourse.julialang.org/t/julia-v1-4-2-has-been-released/40148)

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**Author:** [@ararslan](https://discourse.julialang.org/u/ararslan)\
**Replies:** 1\
**Last updated:** [May 25, 2020, 7:02pm UTC](https://discourse.julialang.org/t/julia-v1-4-2-has-been-released/40148 "2020-05-25T19:02:41Z")

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Julia version 1.4.2, the second patch release in the 1.4 series of releases, is now available. You can get binaries for Linux (i686, x86-64, AArch64), FreeBSD (x86-64), macOS, and Windows (32-, 64-bit) at Download Julia. …

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## [Evaluate string based on dictionary values](https://discourse.julialang.org/t/evaluate-string-based-on-dictionary-values/40135)

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**Author:** [@catosp](https://discourse.julialang.org/u/catosp)\
**Replies:** 7\
**Last updated:** [May 25, 2020, 4:46pm UTC](https://discourse.julialang.org/t/evaluate-string-based-on-dictionary-values/40135 "2020-05-25T16:46:46Z")

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Hello! Is possible to evaluate a string something like “x + y” or “x \> y” based on values of x and y taken from dictionary? In python works if I write eval(“x+y”, dict), but in julia I can’t do it. Thank you!

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## [Made Julia quit and now won't run even after re-install](https://discourse.julialang.org/t/made-julia-quit-and-now-wont-run-even-after-re-install/39805)

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**Author:** [@HelgavonLichtenstein](https://discourse.julialang.org/u/HelgavonLichtenstein)\
**Replies:** 11\
**Last updated:** [May 25, 2020, 3:36pm UTC](https://discourse.julialang.org/t/made-julia-quit-and-now-wont-run-even-after-re-install/39805 "2020-05-25T15:36:38Z")

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I pasted the error message here I was using callbacks with differential equations and comprehension. Julia quit and when I tried to run Atom again there was an error regarding resolve (?). I de-installed and re-instal…

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## [Counts of unique values per group in a DataFrame](https://discourse.julialang.org/t/counts-of-unique-values-per-group-in-a-dataframe/40088)

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**Author:** [@kevin.squire](https://discourse.julialang.org/u/kevin.squire)\
**Replies:** 3\
**Last updated:** [May 25, 2020, 3:25pm UTC](https://discourse.julialang.org/t/counts-of-unique-values-per-group-in-a-dataframe/40088 "2020-05-25T15:25:27Z")

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Hi, I’m trying to determine unique counts of values in a column per group in a DataFrame. As an example, given the following: using DataFrames julia\> df = DataFrame(lab = \[repeat(\["Lab1"\], 4)...; repeat(\["Lab2"\], 5).…

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## [Warning in package dependency that I do not understand](https://discourse.julialang.org/t/warning-in-package-dependency-that-i-do-not-understand/40110)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 6\
**Last updated:** [May 25, 2020, 3:15pm UTC](https://discourse.julialang.org/t/warning-in-package-dependency-that-i-do-not-understand/40110 "2020-05-25T15:15:26Z")

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I am developing a package (Bblt) and at a certain point I added (or at least, I thought to have added) a dependency to ProgressMeter. I did that by activating the package environment and adding ProgressMeter. This acti…

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## [Purposes of explicit type annotations](https://discourse.julialang.org/t/purposes-of-explicit-type-annotations/40105)

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**Author:** [@pauljurczak](https://discourse.julialang.org/u/pauljurczak)\
**Replies:** 7\
**Last updated:** [May 25, 2020, 3:13pm UTC](https://discourse.julialang.org/t/purposes-of-explicit-type-annotations/40105 "2020-05-25T15:13:50Z")

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From the manual: Adding \[type\] annotations serves three primary purposes: to take advantage of Julia’s powerful multiple-dispatch mechanism, to improve human readability, and to catch programmer errors. I’m curious w…

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## [Bayesian inference in the presence of intractable integral](https://discourse.julialang.org/t/bayesian-inference-in-the-presence-of-intractable-integral/40061)

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**Author:** [@francesco.alemanno](https://discourse.julialang.org/u/francesco.alemanno)\
**Replies:** 13\
**Last updated:** [May 25, 2020, 2:43pm UTC](https://discourse.julialang.org/t/bayesian-inference-in-the-presence-of-intractable-integral/40061 "2020-05-25T14:43:53Z")

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Hi guys, recently i’ve learned about the powerful packages for bayesian inference in julia i would like some tips on how to attack this problem, given this probabiliy distribution over the angles \\theta: P(\\vec \\theta…

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## [TArray push in Turing.jl](https://discourse.julialang.org/t/tarray-push-in-turing-jl/39980)

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**Author:** [@fooman](https://discourse.julialang.org/u/fooman)\
**Replies:** 9\
**Last updated:** [May 25, 2020, 2:28pm UTC](https://discourse.julialang.org/t/tarray-push-in-turing-jl/39980 "2020-05-25T14:28:26Z")

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Just trying to convert the “Infinite Mixture” tutorial example to work with bivariate (as opposed to univariate) clusters: https://turing.ml/dev/tutorials/6-infinitemixturemodel/ In the tutorial, one has: # Locatio…

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## [Julia has exited. Press Enter to start a new session.!](https://discourse.julialang.org/t/julia-has-exited-press-enter-to-start-a-new-session/40122)

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**Author:** [@SackMyRedBullz](https://discourse.julialang.org/u/SackMyRedBullz)\
**Replies:** 1\
**Last updated:** [May 25, 2020, 2:24pm UTC](https://discourse.julialang.org/t/julia-has-exited-press-enter-to-start-a-new-session/40122 "2020-05-25T14:24:12Z")

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My Julia was working just fine this morning, but after opening and closing it, suddenly I could not use the software and no matter what i did it just states: Julia has exited. Press Enter to start a new session. with …

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## [How to list the sysimage that is used](https://discourse.julialang.org/t/how-to-list-the-sysimage-that-is-used/40127)

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**Author:** [@feanor12](https://discourse.julialang.org/u/feanor12)\
**Replies:** 0\
**Last updated:** [May 25, 2020, 2:13pm UTC](https://discourse.julialang.org/t/how-to-list-the-sysimage-that-is-used/40127 "2020-05-25T14:13:22Z")

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Is there a way to list the filename of the sysimage that is used? I checked versioninfo() but I could not find it.

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