jQuery find index of last string

Quick jQuery snippet to insert into string at a specific index (or a last string). For example, to find the last position of a table row.


 //find last position of
 var lastRowIndex = $itemForm.lastIndexOf('');
 console.log(lastRowIndex);

You could then insert the string into the index of another string like so:


console.log($itemForm.substring(lastRowIndex, $itemForm.length));
$itemForm = $itemForm.substring(0,lastRowIndex) + "" + data.tableRowTemplate.html() + "" + $itemForm.substring(lastRowIndex, $itemForm.length);
console.log($itemForm);

Frequently Asked Questions (FAQs) about jQuery Find Index of String

How can I use jQuery to find the index of a string in an array?

jQuery doesn’t have a built-in method to find the index of a string in an array. However, you can use the JavaScript method indexOf(). This method returns the first index at which a given element can be found in the array, or -1 if it is not present. Here’s an example:

var array = ["apple", "banana", "cherry"];
var index = array.indexOf("banana");
console.log(index); // Outputs: 1

What is the difference between `find()` and `lastIndexOf()` in jQuery?

The find() method in jQuery is used to get the descendants of each element in the current set of matched elements, filtered by a selector, jQuery object, or element. On the other hand, lastIndexOf() is a JavaScript method that returns the last index at which a certain element can be found in the array, or -1 if the element is not found.

How can I use the `lastIndexOf()` method in JavaScript?

The lastIndexOf() method is used to find the position of the last occurrence of a specified value in a string. Here’s an example:

var str = "Hello world, welcome to the universe.";
var n = str.lastIndexOf("e");
console.log(n); // Outputs: 36

Can I use the `find()` method in jQuery to find the index of a string?

No, the find() method in jQuery is used to get the descendants of each element in the current set of matched elements, filtered by a selector, jQuery object, or element. To find the index of a string, you can use the JavaScript method indexOf().

How can I find the last index of a string in an array using jQuery?

jQuery doesn’t have a built-in method to find the last index of a string in an array. However, you can use the JavaScript method lastIndexOf(). This method returns the last index at which a given element can be found in the array, or -1 if it is not present. Here’s an example:

var array = ["apple", "banana", "cherry", "banana"];
var index = array.lastIndexOf("banana");
console.log(index); // Outputs: 3

What is the difference between `indexOf()` and `lastIndexOf()` in JavaScript?

The indexOf() method returns the first index at which a given element can be found in the array, while lastIndexOf() returns the last index. Both methods return -1 if the element is not found.

Can I use jQuery to find the index of a string in a string?

No, jQuery doesn’t have a built-in method to find the index of a string in a string. However, you can use the JavaScript method indexOf(). This method returns the first index at which a given element can be found in the string, or -1 if it is not present.

How can I use the `find()` method in jQuery?

The find() method in jQuery is used to get the descendants of each element in the current set of matched elements, filtered by a selector, jQuery object, or element. Here’s an example:

$("div").find("p"); // Returns all <p> elements inside <div> elements

Can I use the `lastIndexOf()` method in jQuery?

No, lastIndexOf() is not a jQuery method. It is a JavaScript method that can be used to find the last index at which a given element can be found in the array or string.

How can I find the index of a string in a string using JavaScript?

You can use the indexOf() method in JavaScript to find the index of a string in a string. Here’s an example:

var str = "Hello world, welcome to the universe.";
var n = str.indexOf("welcome");
console.log(n); // Outputs: 13