How do I pipe the output of a unix command to a Julia script?

Question

I'm trying to utilize the STDIN construct with Julia to read in the output of a unix command:

#!/usr/bin/julia
readline(STDIN)

Then in my terminal:

$ cat myfile.txt | ./pipe.jl

but I am not getting any output. What am I doing wrong?

mbauman · Accepted Answer · 2016-05-12 21:25:55Z

5

You're not doing anything with the result of readline(STDIN). What kind of output do you want?

Unlike the interactive REPL, a Julia script won't automatically print results. You need to explicitly print the resulting string:

print(readline(STDIN))

answered May 12, 2016 at 21:25

mbauman

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Comments

Top Sekret · Accepted Answer · 2016-05-12 21:00:42Z

0

The line:

#!/usr/bin/julia

Has to be first, as Unix reads only the first line and checks it for #!. Also, you need to do:

chmod +x pipe.jl

To make it work from ./pipe.jl construct.

answered May 12, 2016 at 21:00

Top Sekret

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It is... I added the filename only here