// 数字转成字符串，同时在前面填充
function fill(num, length, fillers = " ", atLast = false) {
    var result = `${num}`;
    if (result.length < length) {
        let fillString = new Array(length - result.length + 1).join(fillers)
        result = atLast ? `${result}${fillString}` : `${fillString}${result}`;
    }
    return result;
}

module.exports = {
    fill,
}