Sha256: 6f7a82065f6a34b165c479efec87bb8498f630b0da3952902ec2b522122d6b29
Contents?: true
Size: 1.18 KB
Versions: 146
Compression:
Stored size: 1.18 KB
Contents
/**
* Here is an example solution for the AtbashCipher exercise
*/
component {
function encode( phrase ) {
var result = '';
var breakCounter = 0;
phrase
.lcase()
// Clean anything not alphanumeric
.reReplace( '[^0-9a-z]', '', 'all' )
.listToArray( '' )
// Loop over each char
.each( function( char ) {
breakCounter++;
result &= invertChar( char );
// Every 5th char gets a space
if( breakCounter % 5 == 0 ) {
result &= ' ';
}
} );
// Nuke trailing spaces
return result.trim();
}
function decode( phrase ) {
var result = '';
phrase
.lcase()
// Clean anything not alphanumeric
.reReplace( '[^0-9a-z]', '', 'all' )
.listToArray( '' )
// Loop over each char
.each( function( char ) {
result &= invertChar( char );
} );
return result;
}
private function invertChar( char ) {
// Pass numbers straight through
if( asc( char ) >= 49 && asc( char ) <= 57 ) {
return char;
} else {
// For letters, find the offset from "a" and reverse it from "z"
// Using the ascii codes as a handy reference intead of creating an array of chars
return chr( 122 - ( asc( char ) - 97 ) );
}
}
}
Version data entries
146 entries across 145 versions & 1 rubygems