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.
I don't know Go at all. Interesting that the "return" seems to be optional? and there is only "end" and never "begin"! :)
you use
char_count = chart_count.select{...}
can we simply ".size"? like
return "char_count.select{'|k, v| v > 1'}.size"
is it legal in GO?
Most one-liners are difficult to read but this one is clear.
What does ruby type String.group_by do?