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Artemis: Refactor Code for Improved Readability and Performance #21

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25 changes: 16 additions & 9 deletions app/src/main/java/algorithms/Sort.java
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
package algorithms;
import java.util.PriorityQueue;

import java.util.Collections;
import java.util.Vector;
Expand Down Expand Up @@ -45,16 +46,22 @@ public static void DutchFlagPartition(Vector<Integer> v, int pivot_value) {
* @return A vector of the largest n elements in v
*/
public static Vector<Integer> MaxN(Vector<Integer> v, int n) {
// Use a PriorityQueue to store the largest n elements
java.util.PriorityQueue<Integer> maxHeap = new java.util.PriorityQueue<>(Collections.reverseOrder());
for (int i = 0; i < v.size(); i++) {
maxHeap.offer(v.get(i));
// If the heap size exceeds n, remove the smallest element
if (maxHeap.size() > n) {
maxHeap.poll();
}
}
// Extract the elements from the heap
Vector<Integer> ret = new Vector<Integer>();
// Copy the vector so we don't modify the original
Vector<Integer> temp = new Vector<Integer>(v);

Collections.sort(temp);

for (int i = temp.size() - 1; i > temp.size() - n - 1; i--) {
ret.add(temp.get(i));
while (!maxHeap.isEmpty()) {
ret.add(maxHeap.poll());
}

// Reverse the vector to get the elements in ascending order
Collections.reverse(ret);
return ret;
}
}
}
6 changes: 3 additions & 3 deletions app/src/main/java/datastructures/DsVector.java
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Expand Up @@ -41,8 +41,8 @@ public static Vector<Integer> searchVector(Vector<Integer> v, int n) {
public static Vector<Integer> sortVector(Vector<Integer> v) {
Vector<Integer> ret = new Vector<Integer>(v);

for (int i = 0; i < ret.size(); i++) {
for (int j = 0; j < ret.size() - 1; j++) {
for (int i = 0; i < ret.size() - 1; i++) {
for (int j = 0; j < ret.size() - i - 1; j++) {
if (ret.get(j) > ret.get(j + 1)) {
int temp = ret.get(j);
ret.set(j, ret.get(j + 1));
Expand Down Expand Up @@ -106,4 +106,4 @@ public static Vector<Integer> mergeVectors(Vector<Integer> v1,
}
return ret;
}
}
}
74 changes: 24 additions & 50 deletions app/src/main/java/run/java/App.java
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Expand Up @@ -12,85 +12,59 @@ public class App {
public static void single() {
System.out.println("SingleForLoop");
System.out.println("-------------");
System.out.println(String.format("SumRange(10): %s", Single.sumRange(10)));
System.out.println(
String.format("MaxArray([1, 2, 3, 4, 5]): %s",
Single.maxArray(new int[] { 1, 2, 3, 4, 5 })));
System.out.println(
String.format("SumModulus(100, 3): %s", Single.sumModulus(100, 3)));
System.out.printf("SumRange(10): %s%n", Single.sumRange(10));
System.out.printf("MaxArray([1, 2, 3, 4, 5]): %s%n", Single.maxArray(new int[]{1, 2, 3, 4, 5}));
System.out.printf("SumModulus(100, 3): %s%n", Single.sumModulus(100, 3));
System.out.println();
}

public static void double_() {
System.out.println("DoubleForLoop");
System.out.println("-------------");
System.out.println(
String.format("SumSquare(10): %s", Double.sumSquare(10)));
System.out.println(
String.format("SumTriangle(10): %s", Double.sumTriangle(10)));
System.out.println(
String.format("CountPairs([1, 2, 3, 4, 5]): %s",
Double.countPairs(new int[] { 1, 2, 3, 4, 5, 2 })));
System.out.println(
String.format("CountDuplicates([1, 2, 3, 4, 5], [1, 3, 2, 4, 5]): %s",
Double.countDuplicates(new int[] { 1, 2, 3, 4, 5 },
new int[] { 1, 3, 2, 4, 5 })));
System.out.printf("SumSquare(10): %s%n", Double.sumSquare(10));
System.out.printf("SumTriangle(10): %s%n", Double.sumTriangle(10));
System.out.printf("CountPairs([1, 2, 3, 4, 5]): %s%n", Double.countPairs(new int[]{1, 2, 3, 4, 5, 2}));
System.out.printf("CountDuplicates([1, 2, 3, 4, 5], [1, 3, 2, 4, 5]): %s%n", Double.countDuplicates(new int[]{1, 2, 3, 4, 5}, new int[]{1, 3, 2, 4, 5}));
System.out.println();
}

public static void vector() {
Vector<Integer> inputVec = GenVector.generateVector(10, 10);
Vector<Integer> inputVec2 = GenVector.generateVector(10, 10);
String inputVecStr = inputVec.toString();

System.out.println("Vector");
System.out.println("------");
System.out.println(
String.format("ModifyVector(%s): %s", inputVec.toString(),
DsVector.modifyVector(inputVec).toString()));
System.out.println(String.format("SearchVector(%s, 5): %s",
inputVec.toString(),
DsVector.searchVector(inputVec, 5)));
System.out.println(String.format("SortVector(%s): %s", inputVec.toString(),
DsVector.sortVector(inputVec).toString()));
System.out.println(
String.format("ReverseVector(%s): %s", inputVec.toString(),
DsVector.reverseVector(inputVec).toString()));
System.out.println(
String.format("RotateVector(%s, 3): %s", inputVec.toString(),
DsVector.rotateVector(inputVec, 3).toString()));
System.out.println(String.format(
"MergeVectors(%s, %s): %s", inputVec.toString(), inputVec2.toString(),
DsVector.mergeVectors(inputVec, inputVec2).toString()));

System.out.printf("ModifyVector(%s): %s%n", inputVecStr, DsVector.modifyVector(inputVec).toString());
System.out.printf("SearchVector(%s, 5): %s%n", inputVecStr, DsVector.searchVector(inputVec, 5));
System.out.printf("SortVector(%s): %s%n", inputVecStr, DsVector.sortVector(inputVec).toString());
System.out.printf("ReverseVector(%s): %s%n", inputVecStr, DsVector.reverseVector(inputVec).toString());
System.out.printf("RotateVector(%s, 3): %s%n", inputVecStr, DsVector.rotateVector(inputVec, 3).toString());
System.out.printf("MergeVectors(%s, %s): %s%n", inputVecStr, inputVec2.toString(), DsVector.mergeVectors(inputVec, inputVec2).toString());
System.out.println();
}

public static void primes() {
System.out.println("Primes");
System.out.println("------");
System.out.println(String.format("IsPrime(10): %s", Primes.IsPrime(10)));
System.out.println(
String.format("SumPrimes(10): %s", Primes.SumPrimes(10)));
System.out.println(String.format("PrimeFactors(10): %s",
Primes.PrimeFactors(10).toString()));
System.out.printf("IsPrime(10): %s%n", Primes.IsPrime(10));
System.out.printf("SumPrimes(10): %s%n", Primes.SumPrimes(10));
System.out.printf("PrimeFactors(10): %s%n", Primes.PrimeFactors(10).toString());
System.out.println();
}

public static void sort() {
Vector<Integer> initialVec = GenVector.generateVector(20, 10);
String initialVecStr = initialVec.toString();
System.out.println("Sort");
System.out.println("------");
Vector<Integer> inputVec0 = new Vector<Integer>(initialVec);
Vector<Integer> inputVec0 = new Vector<>(initialVec);
Sort.SortVector(inputVec0);
System.out.println(String.format(
"SortVector(%s): %s", initialVec.toString(), inputVec0.toString()));
Vector<Integer> inputVec1 = new Vector<Integer>(initialVec);
System.out.printf("SortVector(%s): %s%n", initialVecStr, inputVec0.toString());
Vector<Integer> inputVec1 = new Vector<>(initialVec);
Sort.DutchFlagPartition(inputVec1, 5);
System.out.println(String.format("DutchFlagPartition(%s, 5): %s",
inputVec1.toString(),
inputVec1.toString()));
System.out.println(String.format("MaxN(%s, 5): %s", initialVec.toString(),
Sort.MaxN(initialVec, 5).toString()));
System.out.printf("DutchFlagPartition(%s, 5): %s%n", initialVecStr, inputVec1.toString());
System.out.printf("MaxN(%s, 5): %s%n", initialVecStr, Sort.MaxN(initialVec, 5).toString());
System.out.println();
}

Expand All @@ -101,4 +75,4 @@ public static void main(String[] args) {
primes();
sort();
}
}
}
2 changes: 1 addition & 1 deletion app/src/test/java/control/SingleTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -34,4 +34,4 @@ public void testSumModulus() {
assertEquals(18, Single.sumModulus(10, 3));
assertEquals(12, Single.sumModulus(10, 4));
}
}
}
Empty file modified gradlew
100755 → 100644
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