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Free Code Camp Basic Algorithms
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| function rot13(str) { | |
| return str.split('').map(shiftLetters).join(''); | |
| function shiftLetters(letter) { | |
| var charCode = letter.charCodeAt(0); | |
| var shift13 = charCode + 13; | |
| var over90 = 64 + (shift13 - 90); | |
| return String.fromCharCode(charCode <= 64 ? charCode : shift13 > 90 ? over90: shift13); | |
| } | |
| } | |
| // Change the inputs below to test | |
| rot13("SERR PBQR PNZC"); | |
| -> FREE CODE CAMP |
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