A C# syntax question

Question

I am currently teaching myself c# but am confused by the following syntax:

new Deck( new Card[] {} )

where the Deck constructor looks like this:

public Deck(IEnumerable<Card> initialCards)

what does the {} bit mean?

Answer 1

It is an array initializer , and in this instance initializes an empty array.

It can also be used as follows:

int[] bling = new [] { 1, 2, 3 };

or

int[] bling = { 1, 2, 3 };

Answer 2

It is a collection initializer, can be used as follows

new Card[] {
    new Card(),
    new Card(),
    new Card()
};

To initilise an array of cards of length 3 containing three card objects. As you have it, it will be an empty array.

Answer 3

It initialize an empty array.If you have a class like this :

class student {
    private string name;
    private int age;
}

you can initialize this :

student a = new student { name = "a", age = 10};

Sorry for my mistake above. You can initilize an array of student :

student[] students = new student[] {new student {name = "a", age = 10}, new student {name = "b", age = 20 }};