What would be julia equivalent of this ruby one liner?

New to Julia
1

Hello,

I often use following one liner in ruby to see the details of my PATH. What would be the cleanest version of it in julia with less typing.

ruby -e 'puts ENV["PATH"].split(":").sort' or longer version
ruby -e 'ENV["PATH"].split(":").sort.each { |path| puts path }'

This one line code basically splits PATH environment variable based on : which creates a array of strings, sorts it and displays it. I sometimes add .sort.reverse reverse call after sort.

My julia version

julia -e 'foreach(println, split(ENV["PATH"],":") |> sort )' or
julia -e 'foreach(println, sort(split(ENV["PATH"],":")))'

I do not know if function composition can be used in one line code written on terminal.

2 
julia -e 'println.(sort(split(ENV["PATH"],":")))'
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3

If you want to emulate the ā€œchaining-orderā€ (more or less) as in Ruby you can do:

julia> ENV["PATH"] |> x->split(x, ":") |> x->sort(x) |> x->println.(x);

I thought there might be a better way than with anonymous functions, but I can only do slightly shorter:

julia> ENV["PATH"] |> x->split(x, ":") |> sort |> println

Itā€™s good enough to get the info, but slightly different as I couldnā€™t end with println.

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5

FYI: I could do shorter:

julia> (println āˆ˜ sort āˆ˜ split)(ENV["PATH"], ":")

help?> \circ

Note, to get the circle, meaning function composition, from math, you type that, then press TAB. I just recalled this possibility, that I had never used in Julia, and a long time ago in mathā€¦ and there are more ways even with it, see the help, but again, didnā€™t get print. to work. Maybe it should (bug or to-be-implemented) or already can?

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6

Unfortunately this code requires julia console. I wonder if there is a way to write symbolic characters in literal way without needing latex symbols which requires julia aware environment.

7

At worst, or maybe easiest, you can copy and paste the unicode character in your shell. Your shell probably supports unicode via hex, e.g. shell - How do you echo a 4-digit Unicode character in Bash? - Stack Overflow

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8 
julia> foldl(ComposedFunction, (println, sort, split))
println āˆ˜ sort āˆ˜ split
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