3 ms·

There is also the command line version: `qalc`. I use it since I discovered it.

by rom1v 3y ago

Aachen 3y ago
Same. I was happy with `apt install calc` (I think nowadays called apcalc) for years because it does arbitrary precision and isn't as awkward as a python shell or so, but qalc is clearly a step up with support for units and solving $ calc 2^x=4 x is undefined $ qalc 2^x=4 ((2^x) = 4) = (x = 2) I used the above for determining after how many years a given inflation rate doubles a price (1.03^x=2) I think my most recent real-world application for units calculation was about how much energy a device uses in kWh after a year, given that it draws 10W during office hours: $ qalc 10W*(8h/day)*1year to kWh (10 * watt) * ((8 * hour) / day) * (1 * year) = 29.22 kW*h It even does time calculations: 13:37-08:00 tells you that you've been working for about 5.6 hours. I don't know why this isn't the universally used command-line calculator. I have it on my phone as well via a Debian subsystem and it's the best
- kbd 3y ago
  > $ qalc 10W(8h/day)1year to kWh Question: why didn't you need quotes around the first expression? Both Zsh and Bash error on that command without quotes. Are you using nushell?
  - poetaster 3y ago
    hmmmm. bash worked for me as was ?
  - Aachen 3y ago
    Omitted for simplicity
  - JNRowe 3y ago
    With zsh you can call it with the noglob builtin¹, that way it doesn't try to parse the bracketed section as a globbing pattern; if that works for you, then you can simply "alias qalc='noglob qalc'" for future use. ¹ https://zsh.sourceforge.io/Doc/Release/Shell-Grammar.html#Precommand-Modifiers https://zsh.sourceforge.io/Doc/Release/Shell-Grammar.html#Pr...
    - kbd 3y ago
      $ qalc 10W*(8h/day)*1year to kWh zsh: bad pattern: 10W*(8h/day)*1year $:1 noglob qalc 10W*(8h/day)*1year to kWh (10 watts) × (8 hours/day) × (1 year) = 29.22 kW·h Amazing. I use qalc frequently and you just improved my life, thank you!
glibg10b 3y ago
I use it as my calculator app on my phone

There is also the command line version: `qalc`. I use it since I discovered it.

by rom1v 3y ago

There is also the command line version: `qalc`. I use it since I discovered it.

Same. I was happy with `apt install calc` (I think nowadays called apcalc) for years because it does arbitrary precision and isn't as awkward as a python shell or so, but qalc is clearly a step up with support for units and solving $ calc 2^x=4 x is undefined $ qalc 2^x=4 ((2^x) = 4) = (x = 2) I used the above for determining after how many years a given inflation rate doubles a price (1.03^x=2) I think my most recent real-world application for units calculation was about how much energy a device uses in kWh after a year, given that it draws 10W during office hours: $ qalc 10W*(8h/day)*1year to kWh (10 * watt) * ((8 * hour) / day) * (1 * year) = 29.22 kW*h It even does time calculations: 13:37-08:00 tells you that you've been working for about 5.6 hours. I don't know why this isn't the universally used command-line calculator. I have it on my phone as well via a Debian subsystem and it's the best

kbd 3y ago
> $ qalc 10W(8h/day)1year to kWh Question: why didn't you need quotes around the first expression? Both Zsh and Bash error on that command without quotes. Are you using nushell?
- poetaster 3y ago
  hmmmm. bash worked for me as was ?
- Aachen 3y ago
  Omitted for simplicity
- JNRowe 3y ago
  With zsh you can call it with the noglob builtin¹, that way it doesn't try to parse the bracketed section as a globbing pattern; if that works for you, then you can simply "alias qalc='noglob qalc'" for future use. ¹ https://zsh.sourceforge.io/Doc/Release/Shell-Grammar.html#Precommand-Modifiers https://zsh.sourceforge.io/Doc/Release/Shell-Grammar.html#Pr...
  - kbd 3y ago
    $ qalc 10W*(8h/day)*1year to kWh zsh: bad pattern: 10W*(8h/day)*1year $:1 noglob qalc 10W*(8h/day)*1year to kWh (10 watts) × (8 hours/day) × (1 year) = 29.22 kW·h Amazing. I use qalc frequently and you just improved my life, thank you!

glibg10b 3y ago

I use it as my calculator app on my phone