/* Caesar cipher, in Jsish */
"use strict";

function caesarCipher(input:string, key:number):string {
        return input.replace(/([a-z])/g,
            function(mat, p1, ofs, str) {
                return Util.fromCharCode((p1.charCodeAt(0) + key + 26 - 97) % 26 + 97);
            }).replace(/([A-Z])/g,
                function(mat, p1, ofs, str) {
                    return Util.fromCharCode((p1.charCodeAt(0) + key + 26 - 65) % 26 + 65);
                });
}

provide('caesarCipher', 1);

if (Interp.conf('unitTest')) {
    var str = 'The five boxing wizards jump quickly';
;    str;
;    'Enciphered:';
;    caesarCipher(str, 3);
;    'Enciphered then deciphered';
;    caesarCipher(caesarCipher(str, 3), -3);
}

/*
=!EXPECTSTART!=
str ==> The five boxing wizards jump quickly
'Enciphered:'
caesarCipher(str, 3) ==> Wkh ilyh eralqj zlcdugv mxps txlfnob
'Enciphered then deciphered'
caesarCipher(caesarCipher(str, 3), -3) ==> The five boxing wizards jump quickly
=!EXPECTEND!=
*/