Hızlı yanıt: kod örneği
In your first example, you are making a blank array, same as doing . The 2nd example makes an array of size 3 (with all elements ). The 3rd and 4th examples are the same, they both make arrays with those elements.Be careful when using .The preferred way is using the syntax.
var x = []undefinednew Array()var x = new Array(10); // array of size 10, all elements undefinedvar y = new Array(10, 5); // array of size 2: [10, 5][]var x = []; // array of size 0var y = [10] // array of size 1: [1]var z = []; // array of size 0z[2] = 12; // z is now size 3: [undefined, undefined, 12]