Thanks for feedback, I changes to use Test.AssertEquals and added test with random time.

Note: this solution also work if delta > 1

Note: this solution don't work if delta > 1

Oh you hacker :D

Please add more random tests to ensure all cells contains all needed letters.

Thanks for adding random tests :)

Where is no such kata for javascript. I was searching for keywords like unique, distinct and forgot about keyword duplicates :)

You almost correct. d is used basically for generating random integer between from..to, the bigger d value is the bigger range of numbers to select from.

Thanks for your feedback :) I added some more clear examples and improved description about d param, also added some tests to check if generated numbers are really integers, because current solutions generates double numbers in some cases.

Most readable + clever solution :)

Sorry for using ES6 features like spread operator and arrow function, but it's much more readable :)

Thanks for very interesting Kata, I learned a lot :)

According to MDN Object.values is part of ECMAScript 2016 (ES7). I thought we can write only in ES5/ES6 as docs says. +1 for Object.values.

This is very unreadable