OPs attempted language is Ruby.

Perfect, I am glad for you!

I have solved the Kata and I liked it. Everything is ok. Thank you!

You are welcome! Tell me if you succedd.

I think I know, why my code doesn't work properly. The decode(encodeStr()) gives different results. Sorry for disturbing you :)

Is that your print of input in "encode" function or "decode" function?

I have the same problem with test8. The input List is:
[ibb ?z?~ ???~z} ?? }?z, ?? ??}? ???? ~~?; m?, z} ????? {|z??~ ??? ?, ?~z} ?? ?? }?z??. p???, ?z? [ rz?? (1865-1939)]
But I dont understand how it can be decoded to expected String. The ????? can't be converted to expected word, because every letters are same. It looks like symbol '?' mean some problem with ASCII?
Moreover the 'ibb' has the 'b' and it's lower case, but expected 'I' which is upper case.

You don't need second reverse as you end up using reduce :)

In this, to type digit 7, one needs to press 5 times. This test is not present! I can hardcode presses for [2-9] as 4 and still it works! Please add the testcase having 7 or 9 digit in string.

Does this needs to be sequential replacement? Damn.

Ah.. Done it :)

I am so close... But the unary negative and subtraction is making me still fail... Spent almost three hours till now. Now I need some break before trying again :)