How to search an array in JavaScript
Today you will learn how to search an array in JavaScript. Here, we will discuss four different methods to search for an item in an array using JavaScript.
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Way to search an array in JavaScript
1. Filter
The Array.filter() method creates a new array with all elements that pass the test implemented by the provided function.
1 2 3 4 | const numbers = [22, 11, 33, 15, 25]; const newNumbers = numbers.filter(n => n > 20); console.log(newNumbers); // Output: [22, 33, 25] |
2. Find
The Array.find() method returns the value of the first element in the provided array that satisfies the provided testing function. If no values satisfy the testing function, undefined is returned.
1 2 3 4 | const numbers = [22, 11, 33, 15, 25]; const newNumber = numbers.find(n => n > 20); console.log(newNumber); // Output: 22 |
3. Includes
The Array.includes() method determines whether an array includes a certain value among its entries, returning true or false as appropriate.
1 2 3 4 | const numbers = [22, 11, 33, 15, 25]; const isExist = numbers.includes(22); console.log(isExist); // Output: true |
4. IndexOf
The Array.indexOf() method returns the first index at which a given element can be found in the array, or -1 if it is not present.
1 2 3 4 | const numbers = [22, 11, 33, 15, 25]; const index = numbers.indexOf(33); console.log(index); // Output: 2 |
That’s it for today.
Thank you for reading. Happy Coding..!! 🙂
