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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.
Clever solution. We can use result.setCharAt(index, ')'); to make less discussions about StringBuilder::replace
This comment is hidden because it contains spoiler information about the solution
but he uses the replace method, which iterates over the whole string...
All inputs for which conversion to integer would be nonsensical (as is the case with Infinity), should return zero.
If it helps; this kata can be completed with under 40 characters of code.