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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.
Sample tests expect true or false instead of the post code or "Not a post code".
The instructions are ambiguous. It is unclear that alphanumeric characters are allowed the post code but not between its characters. The examples shown in the instructions do not exhibit any extraneous alphanumeric characters.
I have never understood British post codes, and these examples are not sufficient.
Could you specify better what is valid and what is not?
( Or add the
puzzletag. )