JavaScript: Remove non-printable ASCII chars

JavaScript String: Exercise-32 with Solution

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

Test Data:

Sample Solution:-

HTML Code:

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


JavaScript Code:

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


Sample Output:



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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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

var functionOne = function() {

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() {
functionThree(); // ReferenceError

Ref: https://bit.ly/2zMAj1O