On Tuesday, August 19, 2003, at 06:49 PM, Tim Blair wrote:
> That's not going to identify a function uniquely - the hashCode()
> method will return the hashcode for the theName variable, not for the
> function. If I called the method again with exactly the same value,
> it'd return a different hashcode.
>
Since theName is a concatenation of the fileName and functionName, it
is unique and its hash code will never change. Certainly many object's
hash code in Java are based on their memory address, which means that
it can change over time. However, java.lang.String's is computed as...
s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1]
...using int arithmetic, where s[i] is the ith character of the
string, n is the length of the string, and ^ indicates exponentiation.
Thus, it is safe to identify strings with their hash code.
-Matt
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
Archives: http://www.houseoffusion.com/lists.cfm?link=t:4
Subscription: http://www.houseoffusion.com/lists.cfm?link=s:4
Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Your ad could be here. Monies from ads go to support these lists and provide more
resources for the community.
http://www.fusionauthority.com/ads.cfm
