10000 starting over with a clear mind · rhawkenson/javascript-exercises@61592d5 · GitHub
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starting over with a clear mind
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‎caesar/caesar.js

Lines changed: 1 addition & 39 deletions
Original file line numberDiff line numberDiff line change
@@ -1,44 +1,6 @@
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22
const caesar = function(msg, key) {
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let codedMsg = '';
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for(let i=0; i<msg.length; i++){
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let code = msg.charCodeAt(i);
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let newLetter = '';
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if(code >= 65 && code <= 90){
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if (code + key > 90){
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code -= 65;
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code = ((code + key)% 26);
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code += 65;
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codedMsg += String.fromCharCode(code);
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} else{
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newLetter = String.fromCharCode(code + key);
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codedMsg += newLetter;
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}
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} else if(code >= 97 && code <=122){
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if (code + key > 122){
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code -= 122;
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code = ((code + key) % 26);
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code += 122;
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codedMsg += String.fromCharCode(code);
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}else {
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newLetter = String.fromCharCode(code + key);
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codedMsg += newLetter;
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}
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} else {
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codedMsg += msg[i];
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}
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const codeSet = code => (code < 97 ? 65 : 97);
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const mod = (n, m) => (n % m + m) % m;
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const shiftChar = (char, shift) => {
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const code = char.charCodeAt();
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if ((code >= 65 && code <= 90) || (code >= 97 && code <= 122)) {
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return String.fromCharCode(
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mod(code + shift - codeSet(code), 26) + codeSet(code)
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}return codedMsg;
3+
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}
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