LeetCode 2881: Create a New Column Solution
Master LeetCode problem 2881 (Create a New Column), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
2881. Create a New Column
Problem Explanation
Explanation
To create a new column named "bonus" in the DataFrame employees containing doubled values of the "salary" column, we simply need to iterate through each row of the DataFrame and calculate the bonus value by doubling the salary value. We can then add this bonus value as a new column in the DataFrame.
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Algorithm:
- Iterate through each row in the DataFrame.
- For each row, double the value in the "salary" column to calculate the bonus.
- Add the calculated bonus as a new column named "bonus" in the DataFrame.
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Time Complexity: O(n), where n is the number of rows in the DataFrame.
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Space Complexity: O(1) (not considering the space required for the DataFrame itself).
Solution Code
import java.util.*;
class Solution {
public void createNewColumn(DataFrame employees) {
for (int i = 0; i < employees.size(); i++) {
int salary = employees.get(i).get("salary");
employees.get(i).put("bonus", salary * 2);
}
}
}Try It Yourself
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