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.
You should use fold instead of reduce. Because if the array is empty then reduce method will give error.
Facts!!!
I have learnt something new today. The Gauss formula. Thank you so so much to you and @ddt626.
https://stackoverflow.com/questions/13110602/calculate-number-of-a-letter-in-a-string-using-dart
Nice solution!
omg
Hello Doctor :)