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For challenges regarding counting the number of occurrences of some characteristic.
2
votes
Count the number of ones in an unsigned 16-bit integer
C# 8, 41 bytes
C# 8.0 add a new overload to ToString function for convert to binary:
1337.ToString("b").Split('1').Length - 1
https://dotnetfiddle.net/Y2H4eT
Thanks so much to @jdt for a best answer …