C#•12mo ago

Fast search an object in a list using his attribute

So I have a list of ships and each ship has a length width, mass and a name. We need to write a method that searches in this list the oobject using his name attribute. So only a string is given with the method. for example public Ship SearchShip(string shipName){}

3 Replies

LeviCodingOP•12mo ago

c#
public abstract class Schip
{
    private double _lengte;
    public double Lengte {  get; set; }

    private double _breedte;
    public double Breedte { get; set;}

    private double _tonnage;
    public double Tonnage { get; set; }

    private string _naam;
    public string Naam { get; set; }

    public Schip(double lengte, double breedte, double tonnage, string naam)
    {
        Lengte=lengte;
        Breedte=breedte;
        Tonnage=tonnage;
        Naam=naam;
    }
}

c#
public abstract class Schip
{
    private double _lengte;
    public double Lengte {  get; set; }

    private double _breedte;
    public double Breedte { get; set;}

    private double _tonnage;
    public double Tonnage { get; set; }

    private string _naam;
    public string Naam { get; set; }

    public Schip(double lengte, double breedte, double tonnage, string naam)
    {
        Lengte=lengte;
        Breedte=breedte;
        Tonnage=tonnage;
        Naam=naam;
    }
}

c#
public Ship SearchShip(List<Ship> ships, string shipName){}

c#
public Ship SearchShip(List<Ship> ships, string shipName){}

We can not use lambdas, cuz we only learn it later in our course.

joren•12mo ago

iterate over the ships and compare the Naam with the shipName

public static Schip SearchShip(List<Schip> ships, string shipName)
{
    foreach (Schip ship in ships)
    {
        if (ship.Naam.Equals(shipName, StringComparison.OrdinalIgnoreCase))
            return ship;
    }
    return null; // or throw an exception, whatever your assignment states
}

public static Schip SearchShip(List<Schip> ships, string shipName)
{
    foreach (Schip ship in ships)
    {
        if (ship.Naam.Equals(shipName, StringComparison.OrdinalIgnoreCase))
            return ship;
    }
    return null; // or throw an exception, whatever your assignment states
}

(unhide to see an example of an solution)

LeviCodingOP•12mo ago

Is the use of a dictionary not faster? and using the name of the object as a key

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Fast search an object in a list using his attribute