atomicframeworks/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    ROT13

A ROT13 encrypter/decrypter implementation in 113 bytes.
"ROT13... is a simple letter substitution cipher that replaces a letter with the letter 13 letters after it in the alphabet. ROT13 is an example of the Caesar cipher, developed in ancient Rome.
... ROT13 is its own inverse; that is, to undo ROT13, the same algorithm is applied, so the same action can be used for encoding and decoding. The algorithm provides virtually no cryptographic security, and is often cited as a canonical example of weak encryption."
Wikipedia
Source

function r(a,b){return++b?String.fromCharCode((a<"["?91:123)>(a=a.charCodeAt()+13)?a:a-26):a.replace(/[A-z]/g,r)}
For more information

See the 140byt.es site for a showcase of entries (built itself using 140-byte entries!), and follow @140bytes on Twitter.
To learn about byte-saving hacks for your own code, or to contribute what you've learned, head to the wiki.
140byt.es is brought to you by Jed Schmidt, with help from Alex Kloss. It was inspired by work from Thomas Fuchs and Dustin Diaz.

  
## annotated.js
function r(
    a,      // Input text
    b       // Will be undefined at first ++undefined results in NaN which is falsy. Subsequently b will be the index of match which will test true so the character will be rotated
){
    return ++b ?                                                    // When used as a string replacement function it will return the new charater due to the fact that b is being set
        String.fromCharCode(                                        // Create a string from the rotated value
            (a < "[" ? 91 : 123 )                                   // If the character is uppercase (character code value < ]) set the character limit to 91 otherwise set the limit to 123
                > ( a=a.charCodeAt() + 13 ) ? a : a - 26)           // If rotated character value is greater than the limit (91 or 123)  loop to the beginning by subtracting 26
        : a.replace(/[A-z]/g, r)                                    // Replace all A-Z and a-z characters using this function (r)
}

## index.js
function r(a,b){return++b?String.fromCharCode((a<"["?91:123)>(a=a.charCodeAt()+13)?a:a-26):a.replace(/[A-z]/g,r)}

## LICENSE.txt
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2013 Kevin M. McGinty www.atomicframeworks.com

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

## package.json
{
  "name": "rot13",

  "description": "This will encrypt or decrypt your text using the ROT13 cipher",

  "keywords": [
    "rot13",
    "encryption",
    "decryption",
    "cipher",
    "string"
  ]
}

## test.html
<!DOCTYPE html>
<title>ROT13</title>
<div>Expected encrypted value: <b>nopqrstuvxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM</b></div>
<div>Actual encrypted value: <b id="encrypted"></b></div>
<div>Expected decrypted value: <b>abcdefghiklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ</b></div>
<div>Decrypted value: <b id="decrypted"></b></div>

<script>

  function r(a,b){return++b?String.fromCharCode((a=a.charCodeAt()+47,a>126?a-94:a)):a.replace(/[^ ]/g,r)};

  document.getElementById( "encrypted" ).innerHTML = r('abcdefghiklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
  document.getElementById( "decrypted" ).innerHTML = r('nopqrstuvxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM');
</script>
	function r(
	a, // Input text
	b // Will be undefined at first ++undefined results in NaN which is falsy. Subsequently b will be the index of match which will test true so the character will be rotated
	){
	return ++b ? // When used as a string replacement function it will return the new charater due to the fact that b is being set
	String.fromCharCode( // Create a string from the rotated value
	(a < "[" ? 91 : 123 ) // If the character is uppercase (character code value < ]) set the character limit to 91 otherwise set the limit to 123
	> ( a=a.charCodeAt() + 13 ) ? a : a - 26) // If rotated character value is greater than the limit (91 or 123) loop to the beginning by subtracting 26
	: a.replace(/[A-z]/g, r) // Replace all A-Z and a-z characters using this function (r)
	}
	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2013 Kevin M. McGinty www.atomicframeworks.com

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

	0. You just DO WHAT THE FUCK YOU WANT TO.
	{
	"name": "rot13",

	"description": "This will encrypt or decrypt your text using the ROT13 cipher",

	"keywords": [
	"rot13",
	"encryption",
	"decryption",
	"cipher",
	"string"
	]
	}
	<!DOCTYPE html>
	<title>ROT13</title>
	<div>Expected encrypted value: <b>nopqrstuvxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM</b></div>
	<div>Actual encrypted value: <b id="encrypted"></b></div>
	<div>Expected decrypted value: <b>abcdefghiklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ</b></div>
	<div>Decrypted value: <b id="decrypted"></b></div>

	<script>

	function r(a,b){return++b?String.fromCharCode((a=a.charCodeAt()+47,a>126?a-94:a)):a.replace(/[^ ]/g,r)};

	document.getElementById( "encrypted" ).innerHTML = r('abcdefghiklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
	document.getElementById( "decrypted" ).innerHTML = r('nopqrstuvxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM');
	</script>