Leetcode learn array Code from Java to Go(DVD)

Creating an Array

Java

// The actual code for creating an Array to hold DVD's.
DVD[] dvdCollection = new DVD[15];

// A simple definition for a DVD.
public class DVD {
    public String name;
    public int releaseYear;
    public String director;

    public DVD(String name, int releaseYear, String director) {
        this.name = name;
        this.releaseYear = releaseYear;
        this.director = director;
    }

    public String toString() {
        return this.name + ", directed by " + this.director + ", released in " + this.releaseYear;
    }
}

Go

// The actual code for creating an Array to hold DVD's.
var dvdCollection = [15]DVD{}

// A simple definition for a DVD.
type DVD struct {
	name        string
	releaseYear int
	director    string
}

func (d *DVD) AddDVD(name string, releaseYear int, director string) {
	d.name = name
	d.releaseYear = releaseYear
	d.director = director
}

func (d DVD) String() string {
	if d.name != "" {
		s := fmt.Sprintf("%s, directed by %s, released in %d", d.name, d.director, d.releaseYear)
		return s
	}
	return "null"
}

• I don't think AddDVD function is needed in Go. because I can decalre values in structure without it.

Writing Items into an Array

Java

// Firstly, we need to actually create a DVD object for The Avengers.
DVD avengersDVD = new DVD("The Avengers", 2012, "Joss Whedon");

// Next, we'll put it into the 8th place of the Array. Remember, because we
// started numbering from 0, the index we want is 7.
dvdCollection[7] = avengersDVD;

Go

// Firstly, we need to actually create a DVD object for The Avengers.
avengersDVD := DVD{"The Avengers", 2012, "Joss Whedon"}
// Next, we'll put it into the 8th place of the Array. Remember, because we
// started numbering from 0, the index we want is 7.
dvdCollection[7] = avengersDVD

Java

DVD incrediblesDVD = new DVD("The Incredibles", 2004, "Brad Bird");
DVD findingDoryDVD = new DVD("Finding Dory", 2016, "Andrew Stanton");
DVD lionKingDVD = new DVD("The Lion King", 2019, "Jon Favreau");

// Put "The Incredibles" into the 4th place: index 3.
dvdCollection[3] = incrediblesDVD;

// Put "Finding Dory" into the 10th place: index 9.
dvdCollection[9] = findingDoryDVD;

// Put "The Lion King" into the 3rd place: index 2.
dvdCollection[2] = lionKingDVD;

Go

incrediblesDVD := DVD{"The Incredibles", 2004, "Brad Bird"}
findingDoryDVD := DVD{"Finding Dory", 2016, "Andrew Stanton"}
lionKingDVD := DVD{"The Lion King", 2019, "Jon Favreau"}

// Put "The Incredibles" into the 4th place: index 3.
dvdCollection[3] = incrediblesDVD

// Put "Finding Dory" into the 10th place: index 9.
dvdCollection[9] = findingDoryDVD

// Put "The Lion King" into the 3rd place: index 2.
dvdCollection[2] = lionKingDVD

Java

DVD starWarsDVD = new DVD("Star Wars", 1977, "George Lucas");
dvdCollection[3] = starWarsDVD;

Go

starWarsDVD := DVD{"Star Wars", 1977, "George Lucas"}
dvdCollection[3] = starWarsDVD

Reading Items from an Array

Java

// Print out what's in indexes 7, 10, and 3.
System.out.println(dvdCollection[7]);
System.out.println(dvdCollection[10]);
System.out.println(dvdCollection[3]);

// Will print:

// The Avengers, directed by Joss Whedon, released in 2012
// null
// Star Wars, directed by George Lucas, released in 1977

Go

// Print out what's in indexes 7, 10, and 3.
fmt.Println(dvdCollection[7])
fmt.Println(dvdCollection[10])
fmt.Println(dvdCollection[3])

// Will print:

// The Avengers, directed by Joss Whedon, released in 2012
// null
// Star Wars, directed by George Lucas, released in 1977

• go.dev/play/p/K9DPj7RxrXV