function string2int(s) {
    var number = {
        '0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5,
        '6': 6, '7': 7, '8': 8, '9': 9
    }
    var array_str = [];
    for (let c of s) {
        array_str.push(number[c]);
    }
    var num = array_str.reduce( function (x, y) {
        return x * 10 + y;
    })
    return num;
}