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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.
0is an even number "by default".It's impossible to modify a string in JS as copies are passed to functions.
Please, remove this.
What does "odd occurrences" even mean? Characters at odd indices? It doesn't look like this here:
oddReplace('bcadaa','a','x') -> 'bcxdxa'Characters that are special for regexps should be tested.
Too few tests.