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Remove Elements from an Array – Complete Guide

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    Vishnupriya
    Team codedamn
Remove Elements from an Array – Complete Guide

Hey readers, in this article we will be discussing how to remove an element from an array in JavaScript in a step-wise, efficient manner. If you are a beginner and want to learn JavaScript then do check out the course on Codedamn.

Remove elements from a JavaScript Array

The elements or a group of values are stored in a JavaScript array, which is a single variable. In any position, you can add or remove elements from the array. In this post, we’ll look at a few methods for removing elements from an array. There are several techniques for removing elements from a JavaScript array, which are described below.

The method pop() is used to remove elements from the end of an array.

The shift() function is used to remove elements from the beginning of an array.

The splice() method is used to delete elements from an array at a given index.

The filter() method is used to remove components in a programmed approach.

Note that JavaScript has various built-in methods that build additional methods.

The methods for removing elements from a JavaScript array are demonstrated in the following examples:

Using the pop() method, you can remove Array elements. This function returns the removed element after removing the final element of the array. This function reduces the array’s length by one.

<script> // JavaScript code to illustrate pop() function // to remove array elements
function func() {
var arr = ["shift", "splice", "filter", "pop"]; // Popping the last element from the array
var popped = arr.pop();
document.write("Removed element: " + popped + "<br>");
document.write("Remaining elements: " + arr);
}
func();
</script>

// Output:
// Removed element: pop
// Remaining elements: shift,splice,filter

Using the shift() function to remove Array elements. This technique is used to delete the first element of the array, reducing the size of the original array by one.

<script> // JavaScript code to illustrate shift() method // to remove elements from array
function func() {
var arr = ["shift", "splice", "filter", "pop"]; // Removing the first element from array
var shifted = arr.shift();
document.write("Removed element: " + shifted + "<br>");
document.write("Remaining elements: " + arr);
}
func();
</script> 

// Output:
// Removed element: shift
// Remaining elements: splice,filter,pop

Using the splice() technique to remove Array elements. This technique is used to change the contents of an array by removing or adding elements. You can specify the elements in a variety of ways when using the splice() method to delete them.

<script> // JavaScript code to illustrate splice() function
function func() {
var arr = ["shift", "splice", "filter", "pop"]; // Removing the specified element from the array
var spliced = arr.splice(1, 1);
document.write("Removed element: " + spliced + "<br>");
document.write("Remaining elements: " + arr);
}
func();
</script> 

// Output:
// Removed element: splice
// Remaining elements: shift,filter,pop

Using the filter() method to remove Array elements. This method is used to build a new array from a given array that contains only those elements from the supplied array that satisfy a criterion set by the argument function. You can specify the elements in a variety of ways when using the filter() method to eliminate them.

<script> // JavaScript to illustrate filter() method
function isPositive( value ) {
return value > 0;
}
function func() {
var filtered = [101, 98, 12, -1, 848].filter( isPositive );
document.write("Positive elements in array: " + filtered);
}
func();
</script>

// Output:
// Positive elements in array: 101,98,12,848

Using the Remove Method to Remove Array Elements. Creating a remove method that uses the filter method to remove elements from a JavaScript array. This procedure works in the opposite direction.

<script>
// Declare and initialize an array
var array = ["lowdash", "remove", "delete", "reset"]
// Using filter method to create a remove method
function arrayRemove(arr, value) {
return arr.filter(function(code){
return code!= value;
});
}
var result = arrayRemove(array, "delete");
document.write("Remaining elements: " + result)
</script>
Remove Array Elements with the Delete Operator: To remove elements from a JavaScript array, use the delete operator.
<script>
// Declare and initialize an array
var array = ["lowdash", "remove", "delete", "reset"]
// Delete element at index 2
var deleted = delete array[2];
document.write("Removed: " + deleted + "<br>");
document.write("Remaining elements: " + array);
</script> 

Remove Array Elements with the Clear and Reset Operator: To remove elements from a JavaScript array, use the clear and reset operators.

<script>
// Declare and initialize an array
var array = ["lowdash", "remove", "delete", "reset"]
// Sorting array in another array
var codedamn = array
// Delete each element of array
array = []
document.write("Empty array: " + array + "<br>")
document.write("Original array: " + codedamn)
</script> 

Conclusion

This was all about removing elements from an array in JavaSript. If you want to learn more about javascript, do check out the article and course on Codedamn of javascript along with the course. Hope you liked this, if you have any queries or suggestions do let us know in the comments. 

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