cryptic comment in jdk source: // HD, Section 2-1
Question
i just stumbled onto this comment.
public static int lowestOneBit(int i) {
// HD, Section 2-1
return i & -i;
}
in the 1.5 java source. what does this comment mean? is it a reference to a book? a spec?
Solution
HD probably refers to Hacker's Delight by Henry S. Warren. Indeed, this formula appears on page 11, section 2-1.
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