How to useArray Map and Join in Javascript
In this approach, we split the input string into an array of characters using split(”), then we use the map() method to replace non-alphanumeric characters with an empty string. Finally, we join the transformed array back into a string using join(”).
Example:
function removeNonAlphanumeric(inputString) {
return inputString.split('').map(char => {
return /[a-zA-Z0-9]/.test(char) ? char : '';
}).join('');
}
const originalString = "Hello! This is 123 a test string.";
const result = removeNonAlphanumeric(originalString);
console.log(result); // Output: HelloThisis123ateststring
Output
HelloThisis123ateststring
JavaScript Program to Remove Non-Alphanumeric Characters from a String
We will see how to remove non-alphanumeric characters from a string in JavaScript. Non-alphanumeric characters are symbols, punctuation, and whitespace. Removing them from a string This task can be useful when you want to clean up user inputs, sanitize strings, or perform various text processing operations.
There are multiple approaches to removing non-alphanumeric characters from a string in JavaScript.
Table of Content
- Approach 1: Using Regular Expressions
- Approach 2: Using a Loop and Character Checking
- Approach 3: Using the replace() Method with a Custom Function
- Approach 4: Using Array Filter and Regular Expression
- Approach 5: Using the reduce() Method
- Approach 6: Using Array Map and Join
We will explore all the above methods along with their basic implementation with the help of examples.
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