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JavaScript: Change the characters (lower case) in a string where a turns into z, b turns into y, c turns into x, ..., n turns into m, m turns into n, ..., z turns into a

JavaScript Basic: Exercise-134 with Solution

Write a JavaScript program to change the characters (lower case) in a string where a turns into z, b turns into y, c turns into x, ..., n turns into m, m turns into n, ..., z turns into a.

Pictorial Presentation:

JavaScript: Change the characters (lower case) in a string where a turns into z, b turns into y, c turns into x, ..., n turns into m, m turns into n, ..., z turns into a.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Change the characters (lower case) in a string where a turns into z, b turns into y, c turns into x, ..., n turns into m, m turns into n, ..., z turns into a</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function change_char(str1) {
	var result = [];
	for (var i = 0; i < str1.length; i++)
    {
		var char_order = str1.charCodeAt(i) - 'a'.charCodeAt(0),
			change_char = 25 - char_order + 'a'.charCodeAt(0);
		result.push(String.fromCharCode(change_char));
	}
	return result.join("");
}
console.log(change_char("abcxyz"));
console.log(change_char("python"));  

Sample Output:

zyxcba
kbgslm

Flowchart:

Flowchart: JavaScript - Change the characters (lower case) in a string where a turns into z, b turns into y, c turns into x, ..., n turns into m, m turns into n, ..., z turns into a

ES6 Version:

function change_char(str1) {
	const result = [];
	for (let i = 0; i < str1.length; i++)
    {
        const char_order = str1.charCodeAt(i) - 'a'.charCodeAt(0);
        const change_char = 25 - char_order + 'a'.charCodeAt(0);
        result.push(String.fromCharCode(change_char));
    }
	return result.join("");
}
console.log(change_char("abcxyz"));
console.log(change_char("python")); 

Live Demo:

See the Pen javascript-basic-exercise-134 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

Checks if a string is an anagram of another string (case-insensitive, ignores spaces, punctuation and special characters)

Example:

const isAnagram = (str1, str2) => {
  const normalize = str =>
    str
      .toLowerCase()
      .replace(/[^a-z0-9]/gi, '')
      .split('')
      .sort()
      .join('');
  return normalize(str1) === normalize(str2);
};
console.log(isAnagram('iceman', 'cinema')); // true

Output:

true