How to reset to an empty array

Question

So with my code, the question which I'm trying to answer in Javascript is to reset the items in an array, where it's creating a function named empty, and then reset the items inside an array. So far I have tried out pop array and it lists the whole array out, and then I have tried to write it by using array length.

Here is my code set up for this one:

function empty(){
 for(var basket = basket.length=0; basket--);
}
console.log('Reset basket:', basket);

• The Bomb Squad: um, firstly, basket would be undefined so an error would throw immediately, secondly, the syntax in that forloop makes no sense :{
• gen_Eric: What are you trying to do to basket? Couldn't you just do basket = [] (or basket.length = 0;)?

Answer 1

If you need to replace just the variable basket with an empty array, simply reassign it:

basket = [];

If you need to reset the actual array referenced by the variable, and therefore reset all references to the same array, simply set .length to 0.

basket.length = 0;

Your syntax though is incorrect. As a function, it would look like:

function empty(array) {
 array.length = 0;
}
let arr1 = [1, 2, 3];
let arr2 = arr1; // both variables reference the same array
let arr3 = [...arr1]; // references a different array
empty(arr1);
console.log(arr1); // []
console.log(arr2); // []
console.log(arr3); // [1, 2, 3]