In this article, we will see how to remove a specific item from an array in javascript. We will use the indexOf() method and splice() method to remove the item from the array at a specific index in javascript. Here, we will find the index of the array you want to remove using the indexOf() method after that remove the index using the splice() method. Also, we will remove specific values from an array using the filter() method.
The indexOf() method returns the first index of the value in the string. The indexOf() returns -1 if value is not present in the string.
The splice() method is used to change the content of the array by removing or replacing an existing element and/or adding new elements. The splice() method overwrites the original array element.
The filter() method creates a duplicate of the given array. The filter() method doesn't change the original array and it doesn't execute the function for an empty array element.
So, let's see how to remove a specific item from an array in jquery.
Example:
const array = [2, 3, 5];
console.log(array);
const index = array.indexOf(3);
if (index > -1) { // only splice array when item is found
array.splice(index, 1); // 2nd parameter means remove one item only
}
// array = [2, 5]
console.log(array);
Output:
[ 2, 3, 5 ]
[ 2, 5 ]
Example:
The first function removes a single occurrence like removing the first match of 3 in a given array value [2,3,5,7,3,9,3]. And the second function is to remove all occurrences in a given array value.
function removeItemOnce(arr, value) {
var index = arr.indexOf(value);
if (index > -1) {
arr.splice(index, 1);
}
return arr;
}
function removeAllItem(arr, value) {
var i = 0;
while (i < arr.length) {
if (arr[i] === value) {
arr.splice(i, 1);
} else {
++i;
}
}
return arr;
}
// Usage
console.log(removeItemOnce([2,3,5,7,3,9,3], 3))
console.log(removeAllItem([2,3,5,7,3,9,3], 3))
Output:
[ 2, 5, 7, 3, 9, 3 ]
[ 2, 5, 7, 9 ]
Example:
var value = 3
var arr = [2,3,5,7,3,9,3]
arr = arr.filter(function(item) {
return item !== value
})
console.log(arr)
Output:
You might also like:
Today in this post we will see multi step form example in laravel, here we will create laravel multi step form example.&...
Jul-21-2021
In this tutorial, I will explain you to how to get the selected checkbox value from a checkbox list in jquery, If y...
Jun-17-2020
In this example we will see how to convert html to pdf using javaScript. PDF file format is very useful to dow...
Aug-23-2021
In this article, we will see laravel 9 whereColumn() query example. The whereCoulmn method is used to verify whethe...
Oct-21-2022