captainalan / 36-time

36 hours per day, 36 minutes per hour, 36 seconds per minute, in base 6

Online on Github Pages.

Prompt

write a function, that takes a string of the form "hh:mm:ss" that is 24hour clock, the function returns a string of the form "hh:mm:ss", where the output is em time, where hh ranges from 0 to 35, but is in heximal number notation (where digits are 0 to 5 only). Similar for mm and ss.

;; Sample correct values for reference

(emi/sen "00:00:00")
;; "00:00:00"

(emi/sen "00:00:30")
;; "00:00:24"

(emi/sen "00:01:00")
;; "00:00:52"

(emi/sen "00:30:00")
;; "00:43:00"

(emi/sen "01:00:00")
 ;; "01:30:00"

(emi/sen "12:00:00")
;; "30:00:00"

(emi/sen "13:00:00")
;; "31:30:00"

(emi/sen "13:14:15")
;; "31:50:45"

(emi/sen "16:00:00")
;; "40:00:00"

Running tests

You'll need npm. After installing the jest testing library by doing npm install, do npm run test from this directory.

Emily's implementation tips

I followed this general approach

the general technique that I use to do the conversion is work out as a percentage how far through the day we are in the input of 24 hours - then convert that percentage into EmTime - so 24H->day%->EmTime this is implemented in my elisp code above

Things I learned

• just found you can use Number.toString(base)... aiyaaa wrote this myself here for 6
• ^ woops turns out I needed that for a quick fix