JavaScript: Eliminate a specific element and retrieve the modified array

Question

JavaScript: Eliminate a specific element and retrieve the modified array

Is there a way to remove only one instance of an item from an array, even if there are multiple duplicates of that item? For example:

let array = ["abc", "def", "ghi", "def"];
const toRemove = "def";

I attempted to find the index and splice the array, but it ended up deleting the item completely.

const index = array.indexOf(toRemove);
console.log(array.splice(index,1)); //["def"]

Is there an alternative approach to achieve the desired result, where the remaining array is [ "abc", "ghi", "def" ]?

javascript arrays

Answer 1

Answer №1

You're so close to the solution. Using the splice() method will change the original array and give back an array containing the altered value(s). Remember to provide both the start and deleteCount arguments when using this method. Once you've done that, simply refer to your original array like this:

let array = ["abc", "def", "ghi", "def"];
const toRemove = "def";
const removed = array.splice(array.indexOf(toRemove), 1) // By passing deleteCount as 1, only that element is removed
console.log(removed)
console.log(array);

For more information, visit https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice

Answer 2

You're so close to the solution. Using the splice() method will change the original array and give back an array containing the altered value(s). Remember to provide both the start and deleteCount arguments when using this method. Once you've done that, simply refer to your original array like this:

let array = ["abc", "def", "ghi", "def"];
const toRemove = "def";
const removed = array.splice(array.indexOf(toRemove), 1) // By passing deleteCount as 1, only that element is removed
console.log(removed)
console.log(array);

For more information, visit https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice

Answer 3

Answer №2

The splice() function is used to add or remove elements from an array, while also returning the removed element(s).

It is important to note that this function permanently modifies the original array.

let myArray = ["apple", "banana", "cherry", "banana"];
const itemToRemove = "banana";


const position = myArray.indexOf(itemToRemove);
if (position > -1) {
  console.log(myArray.splice(position, 1));
  console.log(myArray);
}

Answer 4

The splice() function is used to add or remove elements from an array, while also returning the removed element(s).

It is important to note that this function permanently modifies the original array.

let myArray = ["apple", "banana", "cherry", "banana"];
const itemToRemove = "banana";


const position = myArray.indexOf(itemToRemove);
if (position > -1) {
  console.log(myArray.splice(position, 1));
  console.log(myArray);
}

JavaScript: Eliminate a specific element and retrieve the modified array

Answer №1

Answer №2

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