DouKaku?

int bin(int b1, int b2, int b3, int b4, int b5, int b6, int b7, int b8){
    return b1<<7 | b2 <<6 | b3<<5 | b4<<4 | b5<<3 | b6<<2 | b7<<1 | b8;
}

int byte = bin(0, 1, 1, 0, 1, 0, 0, 1);

def binary(nishinsu) {
    total=0
    n=1
    nishinsu.reverse().toList().each 
　　　　　{total = total + it.toInteger()*n; 
            n*=2 }
    println "ans="+total
}

binary('1100')     // 8
binary('01101001') // 105