JavaScript Program to Remove Specific Item From an Array

In this example, you will learn to write a JavaScript program that will remove a specific item from an array.

To understand this example, you should have the knowledge of the following JavaScript programming topics:


Example 1: Using For Loop

// program to remove item from an array

function removeItemFromArray(array, n) {
    const newArray = [];

    for ( let i = 0; i < array.length; i++) {
        if(array[i] !== n) {
            newArray.push(array[i]);
        }
    }
    return newArray;
}

let result = removeItemFromArray([1, 2, 3 , 4 , 5], 2);

console.log(result);

Output

[1, 3, 4, 5]

In the above program, an item is removed from an array using the for loop.

Here,

  • The for loop is used to loop through all the elements of an array.
  • While iterating through the elements of an array, if the item to remove does not match with the array element, that element is pushed to newArray.
  • The push() method adds the element to newArray.

Example 2: Using Array.splice()

// program to remove item from an array

function removeItemFromArray(array, n) {
    const index = array.indexOf(n);

    // if the element is in the array, remove it
    if(index > -1) {

        // remove item
        array.splice(index, 1);
    }
    return array;
}

let result = removeItemFromArray([1, 2, 3 , 4, 5], 2);

console.log(result);

Output

[1, 3, 4, 5]

In the above program, an array and the element to be removed is passed to the custom removeItemFromArray() function.

Here,

const index = array.indexOf(2);
console.log(index); // 1
  • The indexOf() method returns the index of the given element.
  • If the element is not in the array, indexOf() returns -1.
  • The if condition checks if the element to remove is in the array.
  • The splice() method is used to remove the element from an array.

Note: The above program only works for arrays without duplicate elements.

Only the first element of an array that matches is removed.

For example,

[1, 2, 3, 2, 5] results in [1, 3, 2, 5]