bitemyapp

Fire up ghci. Make the text real big. Always show the types for everything as you go!

Takes ~1 hour generally.

Note: if you object to "uncertainty" (evocative of data/value flow possibilities), consider wording like "simultaneously possible values". It's a reference to how the compiler won't know whether Maybe a is a Just a or a Nothing statically. Don't blather at me about dependent types; I know.

Alternate verbiage for uncertainty: product - simultaneous altogetherness, sum - simultaneous singlehood. Also consider what the category theoretic diagrams look like. Can be instructive.

Suggestions taken under advisement.

gelisam

In response to this reddit post about failing to understand the Pipes library after a couple of hours. I wanted to show how an experienced haskeller does it, but I'm afraid it also took me quite a few hours, which is why the following list of steps goes on and on.

After all those hours, my opinion is that Pipes is not at all an easy library. I don't know if Conduit is any easier, but otherwise I side with your friend in advising to use something else (perhaps ordinary lazy IO?) instead of Pipes.

Anyway, here is the full brain dump of my steps as I tried to get your three snippets to fit together.

• Since you say that you have a hard time combining the snippets, I assume that they must have complicated types. So my first goal is to figure out the type of your first snippet.
• hoogle for parseUrl, withManager, etc. No results.
• Google for haskell runEffect, find that it's a method from Pipes.Core,

jatcwang

! model
  pc101           Generic 101-key PC
  pc102           Generic 102-key (Intl) PC
  pc104           Generic 104-key PC
  pc105           Generic 105-key (Intl) PC
  dell101         Dell 101-key PC
  latitude        Dell Latitude series laptop
  dellm65         Dell Precision M65
  everex          Everex STEPnote
  flexpro         Keytronic FlexPro

xontik

#!/bin/bash

# This is a modified version of the Supermicro PID Logic Fan Script from https://forums.freenas.org/index.php?resources/fan-scripts-for-supermicro-boards-using-pid-logic.24/
# and is designed to run on Supermicro X9 boards using an Nuvoton WPCM450 BMC.
#
# IPMI raw commands are gathered from https://www.supermicro.com/support/faqs/faq.cfm?faq=15634
# and https://www.reddit.com/r/homelab/comments/8fhomj/getting_those_supermicro_x9_motherboard_fans/
#
# Attention: When i modified this script, i had already configured full fan mode via ipmi web interface.
# Therefore this script may not enable full fan mode. Please enable it manually, otherwise the ipmi

killerbees19

alias fan-auto='systemctl start supermicro-fan-auto.timer'
alias fan-full='systemctl stop supermicro-fan-auto.timer && sleep 5 && sm fan full'
alias fan-pue2='systemctl stop supermicro-fan-auto.timer && sleep 5 && sm fan pue2'
alias fan-optimal='systemctl stop supermicro-fan-auto.timer && sleep 5 && sm fan optimal'
alias fan-heavyio='systemctl stop supermicro-fan-auto.timer && sleep 5 && sm fan heavyio'
alias fan-standard='systemctl stop supermicro-fan-auto.timer && sleep 5 && sm fan standard'