w3resource

JavaScript: Remove non-word characters

JavaScript String : Exercise-33 with Solution

Write a JavaScript function to remove non-word characters.

Test Data :
console.log(remove_non_word('PHP [email protected]#$%^&*()+`-={}[]|\\:";\'/?><., MySQL'));
"PHP - MySQL"

Pictorial Presentation:

JavaScript: Remove non-word characters

Sample Solution:-

HTML Code :

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to remove non-printable ASCII chars.</title>
</head>
<body>

</body>
</html>

JavaScript Code :

function remove_non_word (str) {
    if ((str===null) || (str===''))
       return false;
 else
   str = str.toString();
  
var PATTERN = /[^\x20\x2D0-9A-Z\x5Fa-z\xC0-\xD6\xD8-\xF6\xF8-\xFF]/g;
  
  return str.replace(PATTERN, '');
}
console.log(remove_non_word('PHP [email protected]#$%^&*()+`-={}[]|\\:";\'/?><., MySQL'));

Sample Output:

PHP - MySQL

Flowchart :

Flowchart: JavaScript- Remove non-word characters

Live Demo :

See the Pen JavaScript Remove non-word characters-string-ex-33 by w3resource (@w3resource) on CodePen.


Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript function to remove non-printable ASCII chars.
Next: Write a JavaScript function to convert a string to title case.

What is the difficulty level of this exercise?



JavaScript: Tips of the Day

JavaScript: Implicit type coercion

function sum(a, b) {
  return a + b;
}

sum(1, '2');

JavaScript is a dynamically typed language: we don't specify what types certain variables are. Values can automatically be converted into another type without you knowing, which is called implicit type coercion. Coercion is converting from one type into another.

In this example, JavaScript converts the number 1 into a string, in order for the function to make sense and return a value. During the addition of a numeric type (1) and a string type ('2'), the number is treated as a string. We can concatenate strings like "Hello" + "World", so what's happening here is "1" + "2" which returns "12".

Ref: https://bit.ly/323Y0P6