Ruby: How to get environment variable?

[HenrikBengtsson]

At the bottom of https://ucsf-cbi.github.io/c4/scheduler/envvars.html we have Bash, Python, and R examples on how to get the numeric value of environment variable SLURM_NPROCS, e.g.

import os
nslots = os.getenv('SLURM_NPROCS', '1')  # env var is always a 'str'
nslots = int(nslots)                     # coerce to 'int'
print('Number of slots available: ' + nslots)

@AaronHechmer / @graft, as our Ruby experts, what's a corresponding example for Ruby?

[graft]

You may use ENV['VAR_NAME']; it is a global constant.

On Wed, Dec 30, 2020, 2:24 PM Henrik Bengtsson notifications@github.com wrote:

At the bottom of https://ucsf-cbi.github.io/c4/scheduler/envvars.html we have Bash, Python, and R examples on how to get the numeric value of environment variable SLURM_NPROCS, e.g.

import osnslots = os.getenv('SLURM_NPROCS', '1') # env var is always a 'str'nslots = int(nslots) # coerce to 'int'print('Number of slots available: ' + nslots)

@AaronHechmer/@graft https://github.com/graft, as our Ruby experts, what's a corresponding example for Ruby?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/UCSF-CBI/c4/issues/34, or unsubscribe https://github.com/notifications/unsubscribe-auth/AACHPA6NW6GV3ZHXNCJ352TSXOSAVANCNFSM4VOYZONA .

[HenrikBengtsson]

Thxs. And how do you coerce that string into an integer and assign it to a local variable. I know ~0.1% Ruby

[HenrikBengtsson]

...and print a message that includes that parsed integer?

[graft]

Sorry, I was sans keyboard earlier. A more complete example:

nslots = (ENV['SLURM_NPROCS'] || 1).to_i
puts "Number of slots available: #{nslots}"

On Wed, Dec 30, 2020, 3:33 PM Henrik Bengtsson notifications@github.com wrote:

...and print a message that includes that parsed integer?

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[HenrikBengtsson]

Thank you. I've add it to https://ucsf-cbi.github.io/c4/scheduler/envvars.html. Like for the other languages, I took the freedom the split it up into one line per "step" to make it more clear what is happening in each step.

[AaronHechmer]

As somebody who grew up just south of Montreal, I'm delighted to see "sans" used here, a useful addition to English along with "faire du shopping," "faire du peepee" and "pamplemousse." However, sans keyboard? That leaves a number of open questions. I'm surprised you saw the thread at all! But you saw the thread and had no keyboard? This happened to me once when Xingyue was babe. I left the room for thirty seconds and she dumped a bottle of pumped breast milk on the laptop keyboard. Was a couple days before I had a replacement keyboard in hand.

I'd hardly call myself a Ruby expert, but I still like it better than python and have the documentation bookmarked: https://ruby-doc.org/

---

From: Saurabh Asthana notifications@github.com Sent: Wednesday, December 30, 2020 4:59 PM To: UCSF-CBI/c4 Cc: Hechmer, Aaron; Mention Subject: Re: [UCSF-CBI/c4] Ruby: How to get environment variable? (#34)

Sorry, I was sans keyboard earlier. A more complete example:

nslots = (ENV['SLURM_NPROCS'] || 1).to_i
puts "Number of slots available: #{nslots}"

On Wed, Dec 30, 2020, 3:33 PM Henrik Bengtsson notifications@github.com wrote:

...and print a message that includes that parsed integer?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/UCSF-CBI/c4/issues/34#issuecomment-752790357https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_UCSF-2DCBI_c4_issues_34-23issuecomment-2D752790357-253E&d=DwQFaQ&c=iORugZls2LlYyCAZRB3XLg&r=kK5BO0vReqfwenBYZKoW0ij2itfL5-6M_LOhSaAH7sM&m=feM8MSYIykBlBB0I8bOEXKAv50swNo7DxUlqrYuKrvQ&s=xn5tybjCE5B_gmMp5jKvRAD6gvZtHlxws95XpXP4HuM&e=, or unsubscribe https://github.com/notifications/unsubscribe-auth/AACHPA54ZRRX75Z6PCFGWTTSXO2FXANCNFSM4VOYZONAhttps://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_notifications_unsubscribe-2Dauth_AACHPA54ZRRX75Z6PCFGWTTSXO2FXANCNFSM4VOYZONA-253E&d=DwQFaQ&c=iORugZls2LlYyCAZRB3XLg&r=kK5BO0vReqfwenBYZKoW0ij2itfL5-6M_LOhSaAH7sM&m=feM8MSYIykBlBB0I8bOEXKAv50swNo7DxUlqrYuKrvQ&s=4GKLbAUI8tAQQx9M_GEd0zY5xCTJrHQsP45I53ry6W8&e= .

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