🔥⚡ Instantly Check JavaScript Arrays for Specific Values

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Learn how to create offline-ready web applications and master the art of testing and debugging complex Node.js apps. Explore Hono.js, a next-gen web framework, and dive into what AI really means. Understand tree-shaking with ES Modules, CommonJS, and dynamic imports, and why soft skills are more important than ever in the age of AI. Plus, learn to interpret data from Google's Chrome UX Report.

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Check if an Array Contains a Specific Value in JavaScript

The containsValue function determines whether a specific value exists within an array using the includes method.

const containsValue = (arr, value) => arr.includes(value);

console.log(containsValue([1, 2, 3], 2)); // true
console.log(containsValue([1, 2, 3], 4)); // false
console.log(containsValue(['apple', 'banana'], 'banana')); // true

How it works:

1. arr.includes(value): Checks if the given value is present in the array.

2. Returns true if the value is found, otherwise false

More code snippets here →

• hono - Web application framework that is fast, lightweight, built on Web Standards, and has support for any JavaScript runtime.

• fonoster - open-source alternative to Twilio

• casl - an isomorphic authorization JavaScript library which restricts what resources a given user is allowed to access

• SqueakJS - an HTML5 runtime engine for Squeak Smalltalk written in pure JavaScript. It also works for many other OpenSmalltalk-compatible images

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