I still dont get how this can be kyu 6... but human readable time is kyu 5? I feel like this needs more time and brains to solve

This issue caused some very strange expected results on the tests.

That took a bit of time to solve. Good kata, but low reward for the effort. IMO, 5 kyu would be appropriate?

This is too hard to be a 6.

Nice kata to practice working on objects. Time-consuming but worthwhile. Could be 5 kyu.

How does this work?

Hello!

Reasult shows:
Expected: 'MON: 11:00 - 23:00\nTUE - SUN: null - null', instead got: 'MON: 11:00 - 23:00'
Expected: 'MON: 11:00 - 23:00\nTUE - SAT: null - null\nSUN: 11:00 - 23:00', instead got: 'MON: 11:00 - 23:00\nSUN: 11:00 - 23:00'
Expected: 'MON - TUE: 11:00 - 23:00\nWED - FRI: null - null\nSAT - SUN: 11:00 - 23:00', instead got: 'MON - TUE: 11:00 - 23:00\nSAT - SUN: 11:00 - 23:00'

Why expected output has unknown word: null??? 'null' really confuses me.

Returning empty array for empty timetable makes no sense whatsoever. It should return empty string.

Test cases starting from the 5th are vulnerable to input modification.

I passed all tests, but have the error:
TypeError: d[0].toUpperCase is not a function
at makeReadable
at solution
at /home/codewarrior/index.js:178:45
at /home/codewarrior/index.js:226:5
at Object.handleError

Can you help with this issue?

thanks :)

This kata was challenging for me, but I enjoyed it very much and learned a lot. Also, I think this one was very well crafted. A complex problem to solve, but not because it was hard to figure out what the problem was asking for. Well done.

Ah, okay. Strictly, the wording is correct, but it's easily misread. Maybe some tweaking of the wording would help? But re-reading it, it makes sense.