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JavaScript: Replace each character of a given string by the next one in the English alphabet

JavaScript Basic: Exercise-84 with Solution

Write a JavaScript to replace each character of a given string by the next one in the English alphabet.

Note: ‘a’ will be replace by ‘b’ or ‘z’ would be replaced by ‘a’.

Pictorial Presentation:

JavaScript: Replace each character of a given string by the next one in the English alphabet.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Write a JavaScript to replace each character of a given string by the next one in the English alphabet</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function alphabet_char_Shift(str) {
  var all_chars = str.split("");
  for(var i = 0; i < all_chars.length; i++) {
    var n = all_chars[i].charCodeAt() - 'a'.charCodeAt();
    n = (n + 1) % 26; 
    all_chars[i] = String.fromCharCode(n + 'a'.charCodeAt());
  }
  return all_chars.join("");
}

console.log(alphabet_char_Shift("abcdxyz"))

Sample Output:

bcdeyza

Flowchart:

Flowchart: JavaScript - Replace each character of a given string by the next one in the English alphabet

ES6 Version:

function alphabet_char_Shift(str) {
  const all_chars = str.split("");
  for(let i = 0; i < all_chars.length; i++) {
    let n = all_chars[i].charCodeAt() - 'a'.charCodeAt();
    n = (n + 1) % 26; 
    all_chars[i] = String.fromCharCode(n + 'a'.charCodeAt());
  }
  return all_chars.join("");
}

console.log(alphabet_char_Shift("abcdxyz"))

Live Demo:

See the Pen javascript-basic-exercise-84 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04