function toDecimal(a){
    let binary= '';
    if (typeof a == 'string'){
        binary = a.split();
    } else {
        binary = a.toString().split();
    }
    let decimal = 0;
    for (let i=0; i < binary.length; i++){
        decimal = (decimal*2)+ binary[i];
    }
    return decimal;
}
    console.log(toDecimal(00001001));