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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Very good. But this issue is solved. Read my answer above and correct you soluton to pass the tests.
I have this problem either
This is no issue! Read the description!
"If the string contains other characters than letters, treat the whole string as it would be empty."
I have this same error :(
This comment is hidden because it contains spoiler information about the solution
Hi
Annietuyan,the kata description says:
If the input array is empty or null, return an empty array. So according to the error message, you do not check, if the input is null OR you try to get the propertylengthof the input befor the check for null.