How Can I Remove a Specific Element from a JavaScript Array Using Only Core JavaScript?

Core JavaScript: Removing Specific Items from Arrays

Question: Can I remove a particular element from an array? I would like to use a method similar to array.remove(value).

Note: Core JavaScript is required; frameworks are not permitted.

Answer:

To remove a specific value from an array in JavaScript, you can use the following steps:

1. Utilize the indexOf method to retrieve the index of the element you wish to remove.
2. Employ the splice method to eliminate the identified index.

Explanation of splice:

The splice method modifies an array by:

• Deleting existing elements
• Adding new elements

Example Code:

const array = [2, 5, 9];

console.log(array);

// Search for specific element
const index = array.indexOf(5);

// Remove element if found
if (index > -1) { // only splice array when item is found
  array.splice(index, 1); // 2nd parameter means remove one item only
}

// Resulting array with removed element
console.log(array);

Output:

[2, 5, 9]
[2, 9]

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