LinkedBag<ItemType> LinkedBag<ItemType>::intersect(const LinkedBag& input) const{
// make a new LinkedBag that will hold the intersect
LinkedBag<ItemType> theIntersect;
// traverse the existing linked list
Node<ItemType>* callerPtr = headPtr;
Node<ItemType>* paramPtr = input.headPtr;
while (callerPtr != nullptr)
{
//cout<<"caller: "<<callerPtr->getItem()<<endl;
while(paramPtr != nullptr){
// compare item entries
//cout<<"input: "<<paramPtr->getItem()<<endl;
if(callerPtr->getItem() == paramPtr->getItem()){ //if there's a match
//add to intersect
theIntersect.add(callerPtr->getItem());
// stop looking for this value
paramPtr = paramPtr->getNext();
break;
}
//advance to next item in paramPtr
paramPtr = paramPtr->getNext();
}
//reset paramPtr
paramPtr = input.headPtr;
//advance to next item in callerPtr
callerPtr = callerPtr->getNext();
}
return theIntersect;
}
LinkedBag<ItemType> LinkedBag<ItemType>::difference(const LinkedBag& input) const{
// make a new LinkedBag that will hold the difference
LinkedBag<ItemType> theDiff;
// traverse the existing linked list
Node<ItemType>* callerPtr = headPtr;
Node<ItemType>* paramPtr = input.headPtr;
while (callerPtr != nullptr)
{
while(paramPtr != nullptr){
// compare item entries
if(callerPtr->getItem() == paramPtr->getItem()){
//do nothing and stop looking
break;
}
//if we get to the end of input and don't find it.
if(paramPtr->getNext() == nullptr){
// items are not equivalent.
//add to difference
theDiff.add(callerPtr->getItem());
break;
}
//advance to next item in paramPtr
paramPtr = paramPtr->getNext();
}
//reset paramPtr
paramPtr = input.headPtr;
//advance to next item in callerPtr
callerPtr = callerPtr->getNext();
}
return theDiff;
}
BagInterface<ItemType>* LinkedBag<ItemType>::intersection(const BagInterface<ItemType> &otherBag) const
{
// create a new bag to return
LinkedBag<ItemType>* newBag = new LinkedBag<ItemType>();
int lcv;
// create a temp copy of the current bag
vector<ItemType> myVec = (*this).toVector();
LinkedBag<ItemType> myBagCopy;
for (lcv = 0; lcv < myVec.size(); lcv ++)
{
myBagCopy.add(myVec[lcv]);
}
// create a temp copy of the argument bag
vector<ItemType> otherBagVec = otherBag.toVector();
LinkedBag<ItemType> otherBagCopy;
for (lcv = 0; lcv < otherBagVec.size(); lcv ++)
{
otherBagCopy.add(otherBagVec[lcv]);
}
// compare and add to the return bag
for (lcv = 0; lcv < myVec.size(); lcv ++)
if (myBagCopy.contains(myVec[lcv]) && otherBagCopy.contains(myVec[lcv]))
{
newBag->add(myVec[lcv]);
myBagCopy.remove(myVec[lcv]);
otherBagCopy.remove(myVec[lcv]);
}
return newBag;
}
LinkedBag<ItemType> LinkedBag<ItemType>::trueDifference(const LinkedBag& input) const{
// make a new LinkedBag that will hold the difference
LinkedBag<ItemType> theDiff;
// traverse the existing linked list
Node<ItemType>* callerPtr = headPtr;
Node<ItemType>* paramPtr = input.headPtr;
int callerCount = 0;
int inputCount = 0;
int diff = 0;
int diffCount = 0;
while (callerPtr != nullptr)
{
while(paramPtr != nullptr){
// compare item entries
if(callerPtr->getItem() == paramPtr->getItem()){
//check to see if already in difference
diffCount = theDiff.getFrequencyOf(callerPtr->getItem());
// if already in difference, break
if(diffCount > 0)
break;
callerCount = getFrequencyOf(callerPtr->getItem());
//cout<<"callerCount is: "<<callerCount<<endl;
inputCount = input.getFrequencyOf(paramPtr->getItem());
//cout<<"inputCount is: "<<inputCount<<endl;
diff = callerCount - inputCount;
//cout<<"diff is: "<<diff<<endl;
if (diff < 0)
diff = 0;
if (diff > 0){
for(int i=0; i<diff; i++)
theDiff.add(callerPtr->getItem());
}
break;
}
//if we get to the end of input and don't find it.
if(paramPtr->getNext() == nullptr){
// items are not equivalent.
//add to difference
theDiff.add(callerPtr->getItem());
break;
}
//advance to next item in paramPtr
paramPtr = paramPtr->getNext();
}
//reset paramPtr
paramPtr = input.headPtr;
//advance to next item in callerPtr
callerPtr = callerPtr->getNext();
}
return theDiff;
}
LinkedBag<ItemType> LinkedBag<ItemType>::trueIntersect(const LinkedBag& input) const{
// make a new LinkedBag that will hold the intersect
LinkedBag<ItemType> theIntersect;
// traverse the existing linked list
Node<ItemType>* callerPtr = headPtr;
Node<ItemType>* paramPtr = input.headPtr;
int callerCount = 0;
int inputCount = 0;
int intersect = 0;
int sectCount = 0;
while (callerPtr != nullptr)
{
//cout<<"caller: "<<callerPtr->getItem()<<endl;
while(paramPtr != nullptr){
// compare item entries
//cout<<"input: "<<paramPtr->getItem()<<endl;
if(callerPtr->getItem() == paramPtr->getItem()){ //if there's a match
//check to see if already in intersect
sectCount = theIntersect.getFrequencyOf(callerPtr->getItem());
// if already in difference, break
if(sectCount > 0)
break;
callerCount = getFrequencyOf(callerPtr->getItem());
//cout<<"callerCount is: "<<callerCount<<endl;
inputCount = input.getFrequencyOf(paramPtr->getItem());
//cout<<"inputCount is: "<<inputCount<<endl;
if(callerCount < inputCount)
intersect = callerCount;
else if (inputCount < callerCount)
intersect = inputCount;
else
// they're the same
intersect = inputCount;
//add to intersect
for(int i=0; i<intersect; i++)
theIntersect.add(callerPtr->getItem());
// stop looking for this value
paramPtr = paramPtr->getNext();
break;
}
//advance to next item in paramPtr
paramPtr = paramPtr->getNext();
}
//reset paramPtr
paramPtr = input.headPtr;
//advance to next item in callerPtr
callerPtr = callerPtr->getNext();
}
return theIntersect;
}
LinkedBag<ItemType> LinkedBag<ItemType>::bagUnion(const LinkedBag& input) const{
// make a new LinkedBag that will hold the union
// copy input values into the union bag using copy constructor
LinkedBag<ItemType> theUnion = LinkedBag(input);
// add the caller values
Node<ItemType>* origChainPtr = headPtr; // Points to nodes in original chain
while (origChainPtr != nullptr) // only add if second chain isn't empty.
{
// Copy first node
theUnion.add(origChainPtr->getItem());
origChainPtr=origChainPtr->getNext();
}
return theUnion;
}
BagInterface<ItemType>* LinkedBag<ItemType>::difference(const BagInterface<ItemType> &otherBag) const
{
int lcv;
vector<ItemType> myVec = (*this).toVector();
vector<ItemType> otherVec = otherBag.toVector();
LinkedBag<ItemType>* newBag = new LinkedBag<ItemType>();
for ( lcv = 0; lcv < myVec.size(); lcv ++ )
{
newBag->add(myVec[lcv]);
}
for (lcv = 0; lcv < otherVec.size(); lcv ++ )
{
newBag->remove(otherVec[lcv]);
}
return newBag;
}
BagInterface<ItemType>* LinkedBag<ItemType>::Union(const BagInterface<ItemType> &otherBag) const
{
LinkedBag<ItemType>* newBag = new LinkedBag<ItemType>();
int lcv;
vector<ItemType> myVec = this->toVector();
vector<ItemType> otherVec = otherBag.toVector();
for (lcv = 0; lcv < myVec.size(); lcv++)
{
newBag->add(myVec[lcv]);
}
for (lcv = 0; lcv < otherVec.size(); lcv++)
{
newBag->add(otherVec[lcv]);
}
return newBag;
}
void copyConstructorTester()
{
LinkedBag<string> bag;
string numbers[] = { "zero", "one", "two", "three", "four", "five" };
for (int i = 0; i < bag.getCurrentSize(); i++)
{
cout << "Adding " << numbers[i] << endl;
bool success = bag.add(numbers[i]);
if (!success)
cout << "Failed to add " << numbers[i] << " to the bag." << endl;
}
cout << bag;
LinkedBag<string> copyOfBag = bag;
cout << "Copy of bag: ";
cout << copyOfBag;
cout << "The copied bag: ";
cout << bag;
} // end copyConstructorTester
void bagTester()
{
LinkedBag<string> bag;
cout << "Testing the Link-Based Bag:" << endl;
cout << "isEmpty: returns " << bag.isEmpty() << "; should be 1 (true)" << endl;
cout << bag;
string numbers[] = { "one", "two", "three", "four", "five", "one" };
cout << "Add 6 items to the bag: " << endl;
for (int i = 0; i < sizeof(numbers)/sizeof(numbers[0]); i++)
{
bag.add(numbers[i]);
} // end for
cout << bag;
cout << "isEmpty: returns " << boolalpha << bag.isEmpty() << "; should be 0 (false)" << endl;
cout << "getCurrentSize: returns " << bag.getCurrentSize() << "; should be 6" << endl;
cout << "Try to add another entry: add(\"extra\") returns " << bag.add(string("extra")) << endl;
cout << "contains(\"three\"): returns " << boolalpha << bag.contains(string("three")) << "; should be 1 (true)" << endl;
cout << "contains(\"ten\"): returns " << bag.contains(string("ten")) << "; should be 0 (false)" << endl;
cout << "getFrequencyOf(\"one\"): returns " << bag.getFrequencyOf(string("one")) << " should be 2" << endl;
cout << "remove(\"one\"): returns " << boolalpha << bag.remove(string("one")) << "; should be 1 (true)" << endl;
cout << "getFrequencyOf(\"one\"): returns " << bag.getFrequencyOf(string("one")) << " should be 1" << endl;
cout << "remove(\"one\"): returns " << boolalpha << bag.remove(string("one")) << "; should be 1 (true)" << endl;
cout << "remove(\"one\"): returns " << boolalpha << bag.remove(string("one")) << "; should be 0 (false)" << endl;
cout << endl;
cout << bag;
cout << "After clearing the bag, ";
bag.clear();
cout << "isEmpty: returns " << bag.isEmpty() << "; should be 1 (true)" << endl;
} // end bagTester
