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:

Sample Solution:-
HTML Code :
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript function to remove non-word characters.</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 :

Live Demo :
See the Pen JavaScript Remove non-word characters-string-ex-33 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
var functionName = function() {} vs function functionName() {}
The difference is that functionOne is a function expression and so only defined when that line is reached, whereas functionTwo is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting).
For example, a function expression:
// TypeError: functionOne is not a function functionOne(); var functionOne = function() { console.log("Hello!"); };
Historically, function declarations defined within blocks were handled inconsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.
'use strict'; { // note this block! function functionThree() { console.log("Hello!"); } } functionThree(); // ReferenceError
Ref: https://bit.ly/2zMAj1O
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