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
Because the first item inside the array will take its place, and it will not get squared/cubed.
Read how reduce works
You're reducing the numbers incorrectly.You didn't even understand the task.There're no 2 fixed test cases with identical input and different expected result. What are you talking about?