This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
HI guys : I overrode hash code on a massive data set, and naively was hashing based on the first 5 chars of sequences that had over 50 letters.
you can imagine what happened next.....
I figured I'd look into the JVM and how it does hashing, and came across some interesting youtube videos on the subject.
Evidently, "Power of 2" hashing is popular.
1) I wonder why this would be better than prime hashing ? Can someone explain the difference ?
2) I also notice that "bit shifting" is popular for hash functions. Why is this ? I see alot of x = x << 5 type statements.