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Hjalmar Peters

Posts: 1
Nickname: 74782
Registered: Jan, 2011

hashCode Posted: Aug 25, 2012 12:18 PM
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In Chapter 30 the hashCode examples are of this form:
override def hashCode = 41 * (41 + x) + y

This formula is equivalent to 41 * 41 + 41 * x + y. I wonder about the meaning of the constant offset 41 * 41. It seems that it just makes the hashCode values larger, the hashcode formula more complex and the calculation slower.

So, what is the advantage of the formula above compared to
override def hashCode = 41 * x + y

Topic: Functional Objects Chapter : Rational Numbers Previous Topic   Next Topic Topic: Scala-based Software Tools Critical for CX
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