How to Use Regular Expressions in Object-Oriented JavaScript?

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Regular expressions (RegEx) are a powerful tool for matching patterns in strings and can be used in JavaScript to search, validate, and manipulate strings. To use regular expressions in object-oriented JavaScript, you can use the built-in RegExp object.

Here’s an example:

const regex = new RegExp(/\d+/);
const str = "I have 100 apples.";
const match = str.match(regex);
console.log(match[0]); // Output: "100"

In this example, regex is a RegExp object that contains a pattern to match digits in a string. The str.match(regex) method returns an array with the first match of the pattern in the string.

You can also use string literals to create regular expressions, like this:

const str = "I have 100 apples.";
const match = str.match(/\d+/);
console.log(match[0]); // Output: "100"

There are many other methods available for working with regular expressions in JavaScript, such as test, exec, replace, and search. You can find more information about using regular expressions in JavaScript in the documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

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