Is array copied?
importance: 3
What is this code going to show?
let fruits = ["Apples", "Pear", "Orange"]; // push a new value into the "copy" let shoppingCart = fruits; shoppingCart.push("Banana"); // what's in fruits? alert( fruits.length ); // ?
The result is 4
:
let fruits = ["Apples", "Pear", "Orange"]; let shoppingCart = fruits; shoppingCart.push("Banana"); alert( fruits.length ); // 4
That’s because arrays are objects. So both shoppingCart
and fruits
are the references to the same array.