Create CaesarCipher.js

Author: rachleona

9. Caesar Cipher/CaesarCipher.js

@@ -0,0 +1,23 @@
+const allShifts = [...Array(26).keys()]
+const cipher = (str, keys=allShifts) => {
+ const chars = str.split("")
+ const res = keys.map( key => {
+ return chars.map( c => {
+ const char = c.charCodeAt(0)
+ if(char > 64 && char < 91)
+ {
+ return String.fromCharCode(65 + (char + key) % 65 % 26)
+ }
+ else if(char > 96 && char < 123)
+ {
+ return String.fromCharCode(97 + (char + key) % 97 % 26)
+ }
+ else
+ {
+ return String.fromCharCode(char)
+ }
+ })
+ })
+
+ return res.map( (r, i) => { return { key: keys[i], result: r.join("") } } )
+}