Code Golf: Duplicate Character Removal in String
- by Alex
The challenge: The shortest code, by character count, that detects and removes duplicate characters in a String. Removal includes ALL instances of the duplicated character (so if you find 3 n's, all three have to go), and original character order needs to be preserved.
Example Input 1:
nbHHkRvrXbvkn
Example Output 1:
RrX
Example Input 2:
nbHHkRbvnrXbvkn
Example Output 2:
RrX
(the second example removes letters that occur three times; some solutions have failed to account for this)
(This is based on my other question where I needed the fastest way to do this in C#, but I think it makes good Code Golf across languages.)
