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:

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:

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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Next: Write a JavaScript program to remove all characters from a given string that appear more than once.
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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
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