Remove Unknown Number of Array Elements Starting at Specific Position

Question

I am aware pop() will remove the last element in a JS array, and that shift() will remove the first one, and that slice() lets you remove elements from an array - and that you can specify what position to start at, and how many to remove, like so:

let cities = ["New York", "Tokyo", "Perth", "Helsinki"];
cities.splice(2, 2);
console.log(cities);

What I'm wondering is if there's a method you can use to start at a certain array position, and remove any additional elements beyond that number?

developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — Roberto Zvjerković
– Roberto Zvjerković, Commented Feb 14, 2019 at 13:44

Yury Tarabanko · Accepted Answer · 2019-02-14 13:46:18Z

3

Yeah, splice. Just do not provide the second argument

From Docs

deleteCount Optional

If deleteCount is omitted, or if its value is larger than array.length - start (that is, if it is greater than the number of elements left in the array, starting at start), then all of the elements from start through the end of the array will be deleted.

let cities = ["New York", "Tokyo", "Perth", "Helsinki"];
cities.splice(2)

console.log(cities)

edited Feb 14, 2019 at 13:46

answered Feb 14, 2019 at 13:43

Yury Tarabanko

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1 Comment

Rey Over a year ago

Ah, nice. Didn't realize this was an option.

Monday A Victor · Accepted Answer · 2019-02-14 13:49:25Z

0

Just use splice provide the initial index only it will assume you want every other value till the end of the array

answered Feb 14, 2019 at 13:49

Monday A Victor

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Comments

Maheer Ali · Accepted Answer · 2019-02-14 14:16:04Z

0

If you don't want to change original array use slice() by passing 0 as first argument

let cities = ["New York", "Tokyo", "Perth", "Helsinki","Landon"];
let number = 1
console.log(cities.slice(0,number));

You can do that using splice() if you want to modify original array.

let cities = ["New York", "Tokyo", "Perth", "Helsinki","Landon"];
let number = 1
cities.splice(number); 
console.log(cities);

edited Feb 14, 2019 at 14:16

answered Feb 14, 2019 at 13:51

Maheer Ali

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