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JavaScript: Remove non-printable ASCII chars

JavaScript String: Exercise-32 with Solution

Write a JavaScript function to remove non-printable ASCII chars.

Test Data:
console.log(remove_non_ascii('äÄçÇéÉêPHP-MySQLöÖÐþúÚ'));
"PHP-MySQL"

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_ascii(str) {
  
  if ((str===null) || (str===''))
       return false;
 else
   str = str.toString();
  
  return str.replace(/[^\x20-\x7E]/g, '');
}

console.log(remove_non_ascii('äÄçÇéÉêPHP-MySQLöÖÐþúÚ'));

Sample Output:

PHP-MySQL

Flowchart:

Flowchart: JavaScript- Remove non-printable ASCII chars

Live Demo:

See the Pen JavaScript Remove non-printable ASCII chars - string-ex-32 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript function to remove non-word characters.

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JavaScript: Tips of the Day

Returns the number of times a function executed per second. hz is the unit for hertz, the unit of frequency defined as one cycle per second

Example:

const tips_hz = (fn, iterations = 100) => {
  const before = performance.now();
  for (let i = 0; i < iterations; i++) fn();
  return (1000 * iterations) / (performance.now() - before);
};
// 10,000 element array
const numbers = Array(10000)
  .fill()
  .map((_, i) => i);

// Test functions with the same goal: sum up the elements in the array
const sumReduce = () => numbers.reduce((acc, n) => acc + n, 0);
const sumForLoop = () => {
  let sum = 0;
  for (let i = 0; i < numbers.length; i++) sum += numbers[i];
  return sum;
};

// 'sumForLoop' is nearly 10 times faster
console.log(Math.round(tips_hz(sumReduce))); 
console.log(Math.round(tips_hz(sumForLoop)));

Output:

4004
990