LeetCode 2695: Array Wrapper
Problem Description
Explanation
To solve this problem, we will create a class ArrayWrapper with two overloaded operators: + for adding two instances of the class and String() for converting the array to a string format. We will implement the addition by summing up the elements of the arrays and the String() function by returning a comma-separated string surrounded by brackets.
Solutions
class ArrayWrapper {
private int[] nums;
public ArrayWrapper(int[] nums) {
this.nums = nums;
}
public int sum() {
int total = 0;
for (int num : nums) {
total += num;
}
return total;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("[");
for (int i = 0; i < nums.length; i++) {
sb.append(nums[i]);
if (i < nums.length - 1) {
sb.append(",");
}
}
sb.append("]");
return sb.toString();
}
public static ArrayWrapper add(ArrayWrapper a, ArrayWrapper b) {
int[] result = new int[a.nums.length + b.nums.length];
System.arraycopy(a.nums, 0, result, 0, a.nums.length);
System.arraycopy(b.nums, 0, result, a.nums.length, b.nums.length);
return new ArrayWrapper(result);
}
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