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);

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);

• javascript
• arrays

Share Improve this question Follow asked Mar 18, 2021 at 19:44 atruckenatrucken 1111 gold badge11 silver badge33 bronze badges 2

• um, firstly, basket would be undefined so an error would throw immediately, secondly, the syntax in that forloop makes no sense :{ – The Bomb Squad Commented Mar 18, 2021 at 19:47
• 1 What are you trying to do to basket? Couldn't you just do basket = [] (or basket.length = 0;)? – gen_Eric Commented Mar 18, 2021 at 19:50

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1 Answer 1

Sorted by: Reset to default 4

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]