33 ms·

Keisan Casio is shutting down

151 points by thazework 3y ago

sublinear 3y ago
Seems like someone would have made a self-hosted clone of this on github by now.
phonon 3y ago
No, only the english part of the website is closing.
- binarycrusader 3y ago
  No, as another poster pointed out: https://keisan.casio.jp/keisan/user_forum/ https://keisan.casio.jp/keisan/user_forum/ 掲示板は2023年9月20日をもちまして廃止することになりました。これまでご利用ありがとうございました。
  - ble 3y ago
    I would say that it's unclear; that announcement appears to apply only to the Keisan Casio user forum. A machine translation follows: > The bulletin board will be abolished on September 20, 2023. > Thank you for using our service. > The bulletin board is a space where members can exchange information and opinions. Please respect each other's opinions and personalities, and post and reply with good sense.
    - deleted 3y ago
      [deleted]
drx 3y ago
It looks like only the English version is shutting down. The Japanese version seems to be going strong: https://keisan.casio.jp/ https://keisan.casio.jp/
- yesbut 3y ago
  Looks like the Japanese forum is going offline too: https://keisan.casio.jp/keisan/user_forum/ https://keisan.casio.jp/keisan/user_forum/
ThinkBeat 3y ago
I had never heard of this site. Now I am sad. It seems useful.
- ycombinete 3y ago
  I recently discovered omnicalculator.com, which seems similar.
  - jansan 3y ago
    Can it do up to 130 digits precision?
  - deleted 3y ago
    [deleted]
- zombot 3y ago
  I wish they would open-source the back-end code, so we could self-host.
  - qsort 3y ago
    Is there even any backend? Sounds like a collection of basic numeric algorithms, it should be possible to replicate almost all of them with little to no effort on either JS/WASM or Python/Pyodide.
- FirmwareBurner 3y ago
  To me this looks like an early and Japanese variant of what Wolfram Alpha is. Am I wrong?
  - 1letterunixname 3y ago
    It was a bunch of static calculators while WA uses NLP and is more-or-less superior in almost every use case. While there isn't a comprehensive list of specific conversions possible on WA, there are many examples categorized on the home page. https://web.archive.org/web/20230831005411/https://keisan.casio.com/ https://web.archive.org/web/20230831005411/https://keisan.ca... Disclaimer: I'm partial to Xcas and HP Erable.
gjvc 3y ago
this is a sad event
throwaway19423 3y ago
Site looks pretty nice. Too bad I just heard of it. I guess no easy way to archive this. This is my biggest grip with all that followed straight HTML.
xyst 3y ago
it will live on in archive.org/.is…
- Kuinox 3y ago
  No, the calculator is implemented server side, archive.org cannot backup that.
  - galangalalgol 3y ago
    Seems like a great use case for wasm. Then it can be cached.
    - jacquesm 3y ago
      JS would suffice.
      - galangalalgol 3y ago
        JS has bigint, but it doesn't support trig operations. Is there something in npm that supports it?
        Kuinox 3y ago
        There are game engine in JS, x86 emulator have been written in JS, JS isn't limiting functionality.
jiofj 3y ago
[flagged]
ugh123 3y ago
Can someone explain what this is/was?
- spicymaki 3y ago
  From Merlot.org: Keisan Online Calculator site is provided and supported by Casio Computer Co., Ltd. This site contains various Free Online Calculators that enable you to carry out high accuracy calculation using arithmetic operation system with variable number of digits uniquely developed by Casio.
- numpad0 3y ago
  A huge collection of fill in blank formulae, like "Travel distance at 10 kph for 10 hr equals to 100 km or 62.137 mi", but seemingly everything the users or their employee needed more than once.
- jansan 3y ago
  For me the high precision calculator (with up to 130 digits precision) was the most (only?) useful part of the website. It was a life saver if you needed it. Really sad to see it go. https://keisan.casio.com/calculator https://keisan.casio.com/calculator
  - jeffwass 3y ago
    Do you have an example of when 130 digits of calculator precision are needed?
    - jansan 3y ago
      For root finding algorithms in some edge cases it helped me decide the multiplicity of a root. Also, when calculating constants I wanted to make sure that the result was as precise as possible without any rounding errors introduced in the calculation.
    - tromp 3y ago
      Solving a "Ponder This" challenge like [1] (and getting the full bonus). [1] https://research.ibm.com/haifa/ponderthis/challenges/August2023.html https://research.ibm.com/haifa/ponderthis/challenges/August2...
rappatic 3y ago
I loved the high precision calculator and used it occasionally. Sad to see it going.
pixelatedindex 3y ago
This is something I would love to see open sourced but I know that’s not going to happen.
1-6 3y ago
Keisan means calculate. I've been to the site on occasion but I'm pretty sure I won't be missing much.
jansan 3y ago
The high precision calculator was a true gem. I have used it a few times when I needed more precision than the 64bit that Javascript gives me. Is there an alternative somewhere?
- sublinear 3y ago
  https://jrsinclair.com/articles/2020/sick-of-the-jokes-write-your-own-arbitrary-precision-javascript-math-library/ https://jrsinclair.com/articles/2020/sick-of-the-jokes-write...
- lifthrasiir 3y ago
  Fabrice Bellard's numcalc.com is okay if you just want JavaScript with more precision.
- taneliv 3y ago
  It doesn't have the same satisfaction of just writing down the numbers and operations on them, but "python3 -c 'import decimal; decimal.getcontext().prec=130; print(decimal.Decimal(2).sqrt())'" will give you any desired precision (130 here) and I imagine roughly the same gamut of mathematics operations as Javascript.
- BearhatBeer 3y ago
  I simply use calc in emacs, it has arbitrary precision (really bound by process memory limit on modern systems).
- tromp 3y ago
  Linux (and MacOS homebrew) offers the arbitrary precision calculator bc: > bc -l sqrt(2) 1.41421356237309504880 scale=64 sqrt(2) 1.4142135623730950488016887242096980785696718753769480731766797379
orangepurple 3y ago
If you want a self-hosted replacement for Keisan I strongly suggest looking at Qalculate! https://qalculate.github.io/ https://qalculate.github.io/ Qalculate even looks up relevant facts online such as when used for real time currency conversion rates, e.g. 1000 JPY/USD
jacobp100 3y ago
(Self promotion) if people like the Casio style calculators, my app is heavily influenced by Casio’s scientific calculators. The editor works almost exactly like theirs, but it has a modern keyboard that’s optimised for touch screens. The rendering uses the LaTeX font too As well, you get a few dedicated modes, like unit conversion, date calculations etc. https://jacobdoescode.com/technicalc https://jacobdoescode.com/technicalc
- dotancohen 3y ago
  Why don't you put the legacy, unmaintained Android version on F-droid?
  - jacobp100 3y ago
    I’ll look into it

151 points by thazework 3y ago

sublinear 3y ago

Seems like someone would have made a self-hosted clone of this on github by now.

phonon 3y ago

No, only the english part of the website is closing.

binarycrusader 3y ago
No, as another poster pointed out: https://keisan.casio.jp/keisan/user_forum/ https://keisan.casio.jp/keisan/user_forum/ 掲示板は2023年9月20日をもちまして廃止することになりました。これまでご利用ありがとうございました。
- ble 3y ago
  I would say that it's unclear; that announcement appears to apply only to the Keisan Casio user forum. A machine translation follows: > The bulletin board will be abolished on September 20, 2023. > Thank you for using our service. > The bulletin board is a space where members can exchange information and opinions. Please respect each other's opinions and personalities, and post and reply with good sense.
  - deleted 3y ago
    [deleted]

drx 3y ago

It looks like only the English version is shutting down. The Japanese version seems to be going strong: https://keisan.casio.jp/ https://keisan.casio.jp/

yesbut 3y ago
Looks like the Japanese forum is going offline too: https://keisan.casio.jp/keisan/user_forum/ https://keisan.casio.jp/keisan/user_forum/

ThinkBeat 3y ago

I had never heard of this site. Now I am sad. It seems useful.

ycombinete 3y ago
I recently discovered omnicalculator.com, which seems similar.
- jansan 3y ago
  Can it do up to 130 digits precision?
- deleted 3y ago
  [deleted]
zombot 3y ago
I wish they would open-source the back-end code, so we could self-host.
- qsort 3y ago
  Is there even any backend? Sounds like a collection of basic numeric algorithms, it should be possible to replicate almost all of them with little to no effort on either JS/WASM or Python/Pyodide.
FirmwareBurner 3y ago
To me this looks like an early and Japanese variant of what Wolfram Alpha is. Am I wrong?
- 1letterunixname 3y ago
  It was a bunch of static calculators while WA uses NLP and is more-or-less superior in almost every use case. While there isn't a comprehensive list of specific conversions possible on WA, there are many examples categorized on the home page. https://web.archive.org/web/20230831005411/https://keisan.casio.com/ https://web.archive.org/web/20230831005411/https://keisan.ca... Disclaimer: I'm partial to Xcas and HP Erable.

gjvc 3y ago

this is a sad event

throwaway19423 3y ago

Site looks pretty nice. Too bad I just heard of it. I guess no easy way to archive this. This is my biggest grip with all that followed straight HTML.

xyst 3y ago

it will live on in archive.org/.is…

Kuinox 3y ago
No, the calculator is implemented server side, archive.org cannot backup that.
- galangalalgol 3y ago
  Seems like a great use case for wasm. Then it can be cached.
  - jacquesm 3y ago
    JS would suffice.
    - galangalalgol 3y ago
      JS has bigint, but it doesn't support trig operations. Is there something in npm that supports it?
      - Kuinox 3y ago
        There are game engine in JS, x86 emulator have been written in JS, JS isn't limiting functionality.

jiofj 3y ago

[flagged]

ugh123 3y ago

Can someone explain what this is/was?

spicymaki 3y ago
From Merlot.org: Keisan Online Calculator site is provided and supported by Casio Computer Co., Ltd. This site contains various Free Online Calculators that enable you to carry out high accuracy calculation using arithmetic operation system with variable number of digits uniquely developed by Casio.
numpad0 3y ago
A huge collection of fill in blank formulae, like "Travel distance at 10 kph for 10 hr equals to 100 km or 62.137 mi", but seemingly everything the users or their employee needed more than once.
jansan 3y ago
For me the high precision calculator (with up to 130 digits precision) was the most (only?) useful part of the website. It was a life saver if you needed it. Really sad to see it go. https://keisan.casio.com/calculator https://keisan.casio.com/calculator
- jeffwass 3y ago
  Do you have an example of when 130 digits of calculator precision are needed?
  - jansan 3y ago
    For root finding algorithms in some edge cases it helped me decide the multiplicity of a root. Also, when calculating constants I wanted to make sure that the result was as precise as possible without any rounding errors introduced in the calculation.
  - tromp 3y ago
    Solving a "Ponder This" challenge like [1] (and getting the full bonus). [1] https://research.ibm.com/haifa/ponderthis/challenges/August2023.html https://research.ibm.com/haifa/ponderthis/challenges/August2...

rappatic 3y ago

I loved the high precision calculator and used it occasionally. Sad to see it going.

pixelatedindex 3y ago

This is something I would love to see open sourced but I know that’s not going to happen.

1-6 3y ago

Keisan means calculate. I've been to the site on occasion but I'm pretty sure I won't be missing much.

jansan 3y ago

The high precision calculator was a true gem. I have used it a few times when I needed more precision than the 64bit that Javascript gives me. Is there an alternative somewhere?

sublinear 3y ago
https://jrsinclair.com/articles/2020/sick-of-the-jokes-write-your-own-arbitrary-precision-javascript-math-library/ https://jrsinclair.com/articles/2020/sick-of-the-jokes-write...
lifthrasiir 3y ago
Fabrice Bellard's numcalc.com is okay if you just want JavaScript with more precision.
taneliv 3y ago
It doesn't have the same satisfaction of just writing down the numbers and operations on them, but "python3 -c 'import decimal; decimal.getcontext().prec=130; print(decimal.Decimal(2).sqrt())'" will give you any desired precision (130 here) and I imagine roughly the same gamut of mathematics operations as Javascript.
BearhatBeer 3y ago
I simply use calc in emacs, it has arbitrary precision (really bound by process memory limit on modern systems).
tromp 3y ago
Linux (and MacOS homebrew) offers the arbitrary precision calculator bc: > bc -l sqrt(2) 1.41421356237309504880 scale=64 sqrt(2) 1.4142135623730950488016887242096980785696718753769480731766797379

orangepurple 3y ago

If you want a self-hosted replacement for Keisan I strongly suggest looking at Qalculate! https://qalculate.github.io/ https://qalculate.github.io/ Qalculate even looks up relevant facts online such as when used for real time currency conversion rates, e.g. 1000 JPY/USD

jacobp100 3y ago

(Self promotion) if people like the Casio style calculators, my app is heavily influenced by Casio’s scientific calculators. The editor works almost exactly like theirs, but it has a modern keyboard that’s optimised for touch screens. The rendering uses the LaTeX font too As well, you get a few dedicated modes, like unit conversion, date calculations etc. https://jacobdoescode.com/technicalc https://jacobdoescode.com/technicalc

dotancohen 3y ago
Why don't you put the legacy, unmaintained Android version on F-droid?
- jacobp100 3y ago
  I’ll look into it