hash function question# Java - 爪哇娇娃
h*3
1 楼
hash function is important in implementing hash table. I know that in java
Object has its hash code, which might be generated from weak hash function.
Following is one snippet that is "supplement hash function"
static int hash(Object x) {
int h = x.hashCode();
h += ~(h << 9);
h ^= (h >>> 14);
h += (h << 4);
h ^= (h >>> 10);
return h;
}
Can anybody help to explain what is the fundamental idea of a hash algorithm
? to generate non-duplicate
Object has its hash code, which might be generated from weak hash function.
Following is one snippet that is "supplement hash function"
static int hash(Object x) {
int h = x.hashCode();
h += ~(h << 9);
h ^= (h >>> 14);
h += (h << 4);
h ^= (h >>> 10);
return h;
}
Can anybody help to explain what is the fundamental idea of a hash algorithm
? to generate non-duplicate