StringAsHex

var dec = function (arr) {
    var result = '';

    arr.forEach(function (v) {
        var letter = String.fromCharCode(parseInt(parseInt(v,16).toString(10)));
        result += letter;
    });

    return result;
};

var enc = function (str) {
    var result = [];

    str.split('').forEach(function (v) {
        result.push(parseInt(v.charCodeAt()).toString(16));
    });

    return result;
};