hashset usage
- HashSet can have null, order is not guaranteed
- HashSet is commonly used if you want to access elements randomly or store a list of items which cannot contain duplicate valueshashset usage
- HashSet can have null, order is not guaranteed
- HashSet is commonly used if you want to access elements randomly or store a list of items which cannot contain duplicate valueshashset implementation
class MyHashSet {
private:
vector<bool> table;
public:
MyHashSet() : table(1e6 + 1, false) {}
void add(int key) {
table[key] = true;
}
void remove(int key) {
table[key] = false;
}
bool contains(int key) {
return table[key];
}
};Copyright © 2021 Codeinu
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