25 lines
654 B
JavaScript
25 lines
654 B
JavaScript
<html><head><title>Caesar</title></head>
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<body><pre id='x'></pre>
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<script type="application/javascript">
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function disp(x) {
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var e = document.createTextNode(x + '\n');
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document.getElementById('x').appendChild(e);
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}
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function trans(msg, rot) {
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return msg.replace(/([a-z])/ig,
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function($1) {
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var c = $1.charCodeAt(0);
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return String.fromCharCode(
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c >= 97 ? (c + rot + 26 - 97) % 26 + 97
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: (c + rot + 26 - 65) % 26 + 65);
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});
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}
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var msg = "The quick brown f0x Jumped over the lazy Dog 123";
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var enc = trans(msg, 3);
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var dec = trans(enc, -3);
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disp("Original:" + msg + "\nEncoded: " + enc + "\nDecoded: " + dec);
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</script></body></html>
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