Loading collection data...
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.
Your program shouldn't break if it receive an invalid (here, null) argument, so you should have some checks for such case before doing anything
76 passed, 1 failed! TypeError: Cannot read property 'length' of null
What am I supposed to do? :'('
haha I love it <3