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This method involves iterating over each row of the DataFrame. We check if the 'quantity' value is null (or equivalent) and set it to zero if it is. This is a straightforward approach that uses conditional checks within loops appropriate for each programming language.
Time Complexity: O(n), where n is the number of products.
Space Complexity: O(1), as we do not use additional space proportional to the input size.
1
This Java solution defines a Product class. The fillMissingQuantities method iterates through the array of Product objects and assigns zero to any null quantity values.
This approach involves leveraging built-in functions or libraries available in programming languages, like pandas in Python or LINQ in C#, to perform the task of filling in missing values effectively and efficiently.
Time Complexity: O(n), where n is the number of products.
Space Complexity: O(1), without additional space for the task.
1import java.util.Arrays;
2import java.util.stream.Stream;
3
4class Product {
5 String name;
6 Integer quantity;
7 Integer price;
8
9 Product(String name, Integer quantity, Integer price) {
10 this.name = name;
11 this.quantity = quantity;
12 this.price = price;
13 }
14}
15
16public class FillMissingData {
17 public static void fillMissingQuantities(Product[] products) {
18 Arrays.stream(products).forEach(product -> {
19 if (product.quantity == null) {
20 product.quantity = 0;
21 }
22 });
23 }
24
25 public static void main(String[] args) {
26 Product[] products = {
27 new Product("Wristwatch", null, 135),
28 new Product("WirelessEarbuds", null, 821),
29 new Product("GolfClubs", 779, 9319),
30 new Product("Printer", 849, 3051)
31 };
32
33 fillMissingQuantities(products);
34
35 Arrays.stream(products).forEach(p -> System.out.println(p.name + ": " + p.quantity + " " + p.price));
36 }
37}Java's Streams API offers a concise approach for iterating through arrays. The forEach method applies a lambda to each product, altering quantities as needed.