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Update Atbash.js

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This commit is contained in:
Bharat Arya
2020-10-03 15:36:23 +05:30
committed by GitHub
parent 5023cdd7cc
commit 985e193ab7
1 changed files with 16 additions and 16 deletions
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32
Ciphers/Atbash.js
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@ -1,8 +1,8 @@
/* /*
The Atbash cipher is a particular type of monoalphabetic cipher The Atbash cipher is a particular type of monoalphabetic cipher
formed by taking the alphabet and mapping it to its reverse, formed by taking the alphabet and mapping it to its reverse,
so that the first letter becomes the last letter, so that the first letter becomes the last letter,
the second letter becomes the second to last letter, and so on. the second letter becomes the second to last letter, and so on.
*/ */
/** /**
@ -10,18 +10,18 @@ the second letter becomes the second to last letter, and so on.
* @param {String} str - string to be decrypted/encrypt * @param {String} str - string to be decrypted/encrypt
* @return {String} decrypted/encrypted string * @return {String} decrypted/encrypted string
*/ */
function Atbash(message) { function Atbash (message) {
let decodedString = '' let decodedString = ''
for(let i = 0; i < message.length; i++) { for (let i = 0; i < message.length; i++) {
if(/[^a-zA-Z]/.test(message[i])) { if (/[^a-zA-Z]/.test(message[i])) {
decodedString += message[i] decodedString += message[i]
} else if(message[i] === message[i].toUpperCase()) { } else if (message[i] === message[i].toUpperCase()) {
decodedString += String.fromCharCode(90 + 65 - message.charCodeAt(i)) decodedString += String.fromCharCode(90 + 65 - message.charCodeAt(i))
} else { } else {
decodedString += String.fromCharCode(122 + 97 - message.charCodeAt(i)) decodedString += String.fromCharCode(122 + 97 - message.charCodeAt(i))
} }
} }
return decodedString return decodedString
} }
// Atbash Example // Atbash Example
const encryptedString = 'HELLO WORLD' const encryptedString = 'HELLO WORLD'