Enviromnent variables

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Enviromnent variables

Postby alexeyv on Sat Mar 04, 2017 10:39 am

How can one read system environment variable in a portable way?
For example in Python I can write
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import os
os.getenv('HOME')

in Common Lisp (at least in CCL or LW) I can call
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(getenv 'HOME')

In Dyalog I was not able to find anything in documentation. I currently used
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⎕SH 'echo $HOME'

but it doesn't look portable :\
alexeyv
 
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Re: Enviromnent variables

Postby Morten|Dyalog on Sat Mar 04, 2017 11:43 am

Try this:

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⎕←2 ⎕NQ '.' 'GetEnvironment' 'HOME'


It isn't EXACTLY the same, in that - under Windows - it will also look on the command line for a switch called HOME, then in the environment, and finally in the Windows Registry, but for writing portable applications it tends to be what you want.
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Morten|Dyalog
 
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Re: Enviromnent variables

Postby alexeyv on Sat Mar 04, 2017 1:22 pm

Thanks! This works (I'm trying on OSX).

I think something like ⎕ENV could be more intuitive though.
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