Strip all non-numeric characters from string in JavaScript

🧩Stripping Non-Numeric Characters in JavaScript

Have you ever found yourself in a situation where you needed to remove all the non-numeric characters from a string in JavaScript? Maybe you're working on a non-DOM scenario, and you've come across a string that contains unwanted characters, and keeping only the numbers is crucial. Fear not! We have some easy solutions for you, no jQuery or other browser-specific methods required.

📜 The Problem

Let's start by understanding the problem at hand. Imagine you have a string like this:

var myString = 'abc123.8<blah>';

Your goal is to remove all non-numeric characters from myString and keep only the numeric ones. In this case, the desired output is 1238.

💡 The Solution

There are multiple ways to achieve this, but we'll cover two simple and effective solutions.

Solution 1: Regular Expressions

Regular expressions (regex) provide a powerful way to manipulate strings in JavaScript. In this case, we can use a regex to match all non-numeric characters and replace them with an empty string:

var myString = 'abc123.8<blah>';
var strippedString = myString.replace(/\D/g, '');

console.log(strippedString); // Output: 1238

In the above code snippet, the replace method is used with the regex pattern \D, which matches any non-digit character. The g flag ensures that all matches are replaced, not just the first one.

Solution 2: Loop and Comparison

Another simple approach involves iterating over each character in the string and comparing it against numeric values. If the character is numeric, we add it to a new string:

var myString = 'abc123.8<blah>';
var strippedString = '';

for (var i = 0; i < myString.length; i++) {
  var char = myString.charAt(i);
  
  if (!isNaN(parseInt(char))) {
    strippedString += char;
  }
}

console.log(strippedString); // Output: 1238

In this solution, we loop through each character of myString and check if it can be parsed into a number using parseInt(). If it's a number, we concatenate it to the strippedString.

🚀 Your Turn!

Now it's your turn to put these solutions into action. Strip some non-numeric characters from a string of your choice and see how they work for you. Don't hesitate to experiment and explore different scenarios.

If you encounter any issues or have questions, feel free to leave a comment below. We're here to help!

So go ahead, grab your code editor, and start stripping those non-numeric characters! 💪🔢

Remember to share your experience with our solutions, or if you have an alternative approach, let us know. Engage with the community and spread the word by sharing this blog post with your fellow coders.

Happy coding! 👨‍💻👩‍💻