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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.
Just realized:
tmp_str = ''
tmp_str = tmp_str + city[x] + ':'
Can be shortended to:
tmp_str = city[x] + ':'
Oh well.
Personally I find it was explained poorly. I thought the entries were randomized so I wandered off with code that wasn't working but then I check the answers and it was just simply to be reversed. My lord, I overcomplicated it for nothing.
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Yeah this one shouldn't have worked.
validatePIN('-12345'); // should return false, but returns true
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