Give a very good method to count the number of ones in a 32 bit number. (caution: looping through testing each bit is not a solution). (Got this question from http://www1.cs.columbia.edu/~kns10/interview/ )
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Give a very good method to count the number of ones in a 32 bit number. (caution: looping through testing each bit is not a solution). (Got this question from http://www1.cs.columbia.edu/~kns10/interview/ )