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.
This comment is hidden because it contains spoiler information about the solution
They compare the result of getting the index of 'english' (which returns -1 if no index can be found) to -1. Comparisons return a boolean value.
True, but I did so since the description didn't say not to mutate the array. Using slice() would likely be a better practice since it returns a shallow copy.
Yes, but mutating the array isn't best practice.