JavaScript: Remove a specific element from an array

Last update on May 30 2022 10:07:54 (UTC/GMT +8 hours)

JavaScript Array: Exercise-31 with Solution

Write a JavaScript function to remove a specific element from an array.

Test data:
console.log(remove_array_element([2, 5, 9, 6], 5));
[2, 9, 6]

Pictorial Presentation:

JavaScript: Remove a specific element from an array

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to remove a specific element from an array</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function remove_array_element(array, n)
 {
   var index = array.indexOf(n);
   if (index > -1) {
    array.splice(index, 1);
}
   return array;
 }

console.log(remove_array_element([2, 5, 9, 6], 5));

Sample Output:

[2,9,6]

Flowchart:

ES6 Version:

function remove_array_element(array, n)
 {
   const index = array.indexOf(n);
   if (index > -1) {
    array.splice(index, 1);
}
   return array;
 }

console.log(remove_array_element([2, 5, 9, 6], 5));

Live Demo:

See the Pen JavaScript - Remove a specific element from an array- array-ex- 31 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04