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Supposedly in Julia I can run shell commands by first hitting ;. But I'm having no luck on my Windows 7 machine. Here's an example where I first run dir in the shell, and then try to do the same in Julia:
C:\Users\Public>dir
Volume in drive C is OS
Volume Serial Number is A4A2-4168
Directory of C:\Users\Public
01/30/2016 03:31 AM <DIR> .
01/30/2016 03:31 AM <DIR> ..
07/13/2009 09:08 PM <DIR> Documents
07/13/2009 08:54 PM <DIR> Downloads
01/02/2017 10:56 AM <DIR> Music
01/16/2016 02:53 PM 262,144 NTUSER.DAT
07/13/2009 08:54 PM <DIR> Pictures
11/20/2010 11:16 PM <DIR> Recorded TV
01/05/2016 06:06 AM <DIR> Roaming
07/13/2009 08:54 PM <DIR> Videos
1 File(s) 262,144 bytes
9 Dir(s) 850,167,861,248 bytes free
C:\Users\Public>julia
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "?help" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.5.0 (2016-09-19 18:14 UTC)
_/ |\__'_|_|_|\__'_| | Official http://julialang.org/ release
|__/ | x86_64-w64-mingw32
shell> dir
ERROR: could not spawn `dir`: no such file or directory (ENOENT)
in _jl_spawn(::String, ::Array{String,1}, ::Ptr{Void}, ::Base.Process, ::RawFD, ::RawFD, ::RawFD) at .\process.jl:3
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in #414 at .\process.jl:478 [inlined]
in setup_stdio(::Base.##414#415{Cmd,Ptr{Void},Base.Process}, ::Tuple{RawFD,RawFD,RawFD}) at .\process.jl:466
in #spawn#413(::Nullable{Base.ProcessChain}, ::Function, ::Cmd, ::Tuple{RawFD,RawFD,RawFD}, ::Bool, ::Bool) at .\pr
ocess.jl:477
in run(::Cmd) at .\process.jl:591
in repl_cmd(::Cmd, ::Base.Terminals.TTYTerminal) at .\client.jl:91
julia>
I've tried other commands, and cd works, but cls does not. What's gone wrong here?
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You can run a Julia file (via Ctrl+F5, which will run whatever Julia file you have open and active), execute Julia commands via the REPL, or even execute a specific block of code from a file you have open.
Julia is a programming language that is freely available. Launch Binder. We can use Julia without installation by clicking the "launch Binder" badge. The notebook CalculusWithJulia. ipynb is a blank notebook except for the command to load the CalculusWithJulia package.
Julia comes with a full-featured interactive command-line REPL (read-eval-print loop) built into the julia executable. In addition to allowing quick and easy evaluation of Julia statements, it has a searchable history, tab-completion, many helpful keybindings, and dedicated help and shell modes.
This works:
shell>cmd /c dir
The problem is that lots of "commands" in Windows are builtins rather than programs. If someone wanted to implement special handling of all the cmd builtins on Windows, a PR would be welcomed.
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