How to use findIndex() method In Javascript
- The findIndex() method in JavaScript is used to get the index of the initial element in an array that meets a particular condition or testing function.
- The method returns the index of the first element that passes the test or -1 if no element passes the test. The findIndex() method does not modify the original array.
Example : This example is the implementation of the above-explained approach.
const array = [10, 20, 30, 40];
const index = array.findIndex(num => num > 25);
console.log(index); // Output: 2
Output
2
Find the Array Index with a Value in JavaScript
Finding the index of a specific value in an array in JavaScript involves searching through the array’s elements to locate the position of the desired value. This index serves as a reference point for accessing or manipulating the value within the array.
Example 1:
Input: ['apple', 'banana', 'cherry', 'orange']
N = 'cherry'
Output: 2
Explanation: The index of the word cherry is 2
These are the following approaches by using these we can find the Array Index with a Value:
Table of Content
- Using indexOf() method
- Using findIndex() method
- Using for loop
- Using Lodash _.findIndex() Method
- Using reduce method
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