var TEST = function () {
    
    function _getNum(arr, arrInfo) {
        if (arrInfo.ptr < arrInfo.len) {
            return arr[arrInfo.ptr];
        }
        return NaN;
    }
    
    function _isFirstMin(a, b) {
        if (isNaN(a)) { return false; }
        if (isNaN(b)) { return true; }
        return a <= b ? true : false;
    }
    
    return {
        exec: function (arr1, arr2) {
            
            let newArr = [];
            let newPtr = -1;
            
            let arrInfo1 = { len: arr1.length, ptr: 0 };
            let arrInfo2 = { len: arr2.length, ptr: 0 };
            
            let len = arrInfo1.len + arrInfo2.len;
            let centerIdxs = [ Math.floor((len-1)/2) ];
            centerIdxs.push((len % 2) === 1 ? centerIdxs[0] : centerIdxs[0] + 1);
            
            let isEnough = false;
            while (!isEnough) {
                let num1 = _getNum(arr1, arrInfo1);
                let num2 = _getNum(arr2, arrInfo2);
                
                newPtr++;
                if (_isFirstMin(num1, num2)) {
                    newArr[newPtr] = num1;
                    arrInfo1.ptr++;
                } else {
                    newArr[newPtr] = num2;
                    arrInfo2.ptr++;
                }
                isEnough = newPtr === centerIdxs[1];
            }
            
            return (newArr[centerIdxs[0]] + newArr[centerIdxs[1]]) / 2;
        }
    };
}();