方法函数

// 数字金额转汉字金额
let changeToChinese = (Num) => {
    //判断如果传递进来的不是字符的话转换为字符
    if (typeof Num == "number") {
        Num = new String(Num);
    };
    Num = Num.replace(/,/g, "") //替换tomoney()中的“,”
    Num = Num.replace(/ /g, "") //替换tomoney()中的空格
    Num = Num.replace(/￥/g, "") //替换掉可能出现的￥字符
    if (isNaN(Num)) { //验证输入的字符是否为数字
        //alert("请检查小写金额是否正确");
        return "";
    };
    //字符处理完毕后开始转换，采用前后两部分分别转换
    var part = String(Num).split(".");
    var newchar = "";
    //小数点前进行转化
    for (var i = part[0].length - 1; i >= 0; i--) {
        if (part[0].length > 10) {
            return "";
            //若数量超过拾亿单位，提示
        }
        var tmpnewchar = ""
        var perchar = part[0].charAt(i);
        switch (perchar) {
            case "0":
                tmpnewchar = "零" + tmpnewchar;
                break;
            case "1":
                tmpnewchar = "壹" + tmpnewchar;
                break;
            case "2":
                tmpnewchar = "贰" + tmpnewchar;
                break;
            case "3":
                tmpnewchar = "叁" + tmpnewchar;
                break;
            case "4":
                tmpnewchar = "肆" + tmpnewchar;
                break;
            case "5":
                tmpnewchar = "伍" + tmpnewchar;
                break;
            case "6":
                tmpnewchar = "陆" + tmpnewchar;
                break;
            case "7":
                tmpnewchar = "柒" + tmpnewchar;
                break;
            case "8":
                tmpnewchar = "捌" + tmpnewchar;
                break;
            case "9":
                tmpnewchar = "玖" + tmpnewchar;
                break;
        }
        switch (part[0].length - i - 1) {
            case 0:
                tmpnewchar = tmpnewchar + "元";
                break;
            case 1:
                if (perchar != 0) tmpnewchar = tmpnewchar + "拾";
                break;
            case 2:
                if (perchar != 0) tmpnewchar = tmpnewchar + "佰";
                break;
            case 3:
                if (perchar != 0) tmpnewchar = tmpnewchar + "仟";
                break;
            case 4:
                tmpnewchar = tmpnewchar + "万";
                break;
            case 5:
                if (perchar != 0) tmpnewchar = tmpnewchar + "拾";
                break;
            case 6:
                if (perchar != 0) tmpnewchar = tmpnewchar + "佰";
                break;
            case 7:
                if (perchar != 0) tmpnewchar = tmpnewchar + "仟";
                break;
            case 8:
                tmpnewchar = tmpnewchar + "亿";
                break;
            case 9:
                tmpnewchar = tmpnewchar + "拾";
                break;
        }
        var newchar = tmpnewchar + newchar;
    }
    //小数点之后进行转化
    if (Num.indexOf(".") != -1) {
        if (part[1].length > 2) {
            // alert("小数点之后只能保留两位,系统将自动截断");
            part[1] = part[1].substr(0, 2)
        }
        for (i = 0; i < part[1].length; i++) {
            tmpnewchar = ""
            perchar = part[1].charAt(i)
            switch (perchar) {
                case "0":
                    tmpnewchar = "零" + tmpnewchar;
                    break;
                case "1":
                    tmpnewchar = "壹" + tmpnewchar;
                    break;
                case "2":
                    tmpnewchar = "贰" + tmpnewchar;
                    break;
                case "3":
                    tmpnewchar = "叁" + tmpnewchar;
                    break;
                case "4":
                    tmpnewchar = "肆" + tmpnewchar;
                    break;
                case "5":
                    tmpnewchar = "伍" + tmpnewchar;
                    break;
                case "6":
                    tmpnewchar = "陆" + tmpnewchar;
                    break;
                case "7":
                    tmpnewchar = "柒" + tmpnewchar;
                    break;
                case "8":
                    tmpnewchar = "捌" + tmpnewchar;
                    break;
                case "9":
                    tmpnewchar = "玖" + tmpnewchar;
                    break;
            }
            if (i == 0) tmpnewchar = tmpnewchar + "角";
            if (i == 1) tmpnewchar = tmpnewchar + "分";
            newchar = newchar + tmpnewchar;
        }
    }
    //替换所有无用汉字
    while (newchar.search("零零") != -1)
        newchar = newchar.replace("零零", "零");
    newchar = newchar.replace("零亿", "亿");
    newchar = newchar.replace("亿万", "亿");
    newchar = newchar.replace("零万", "万");
    newchar = newchar.replace("零元", "元");
    newchar = newchar.replace("零角", "");
    newchar = newchar.replace("零分", "");
    if (newchar.charAt(newchar.length - 1) == "元") {
        newchar = newchar + "整"
    }
    return newchar;
}


//数组排序 1：从小到大 2：从大到小 3：随机
sort = (arr, type = 1) => {
    return arr.sort((a, b) => {
        switch (type) {
            case 1:
                return a - b;
            case 2:
                return b - a;
            case 3:
                return Math.random() - 0.5;
            default:
                return arr;
        }
    })
}

//去除空格 1-所有空格 2-前后空格 3-前空格 4-后空格
trim = (str, type) => {
    type = type || 1
    switch (type) {
        case 1:
            return str.replace(/\s+/g, "");
        case 2:
            return str.replace(/(^\s*)|(\s*$)/g, "");
        case 3:
            return str.replace(/(^\s*)/g, "");
        case 4:
            return str.replace(/(\s*$)/g, "");
        default:
            return str;
    }
}

// 密码强度检测
checkPwd = (str) => {
    var Lv = 0;
    if (str.length < 6) {
        return Lv
    }
    if (/[0-9]/.test(str)) {
        Lv++
    }
    if (/[a-z]/.test(str)) {
        Lv++
    }
    if (/[A-Z]/.test(str)) {
        Lv++
    }
    if (/[\.|-|_]/.test(str)) {
        Lv++
    }
    return Lv;
}

const getDaysDiffBetweenDates = (dateInitial, dateFinal) =>
  (dateFinal - dateInitial) / (1000 * 3600 * 24);

// 事例
getDaysDiffBetweenDates(new Date('2017-12-13'), new Date('2017-12-22')); // 9

//递归
let recursion = arr => { 
    for(let item of arr){
       if (item.children.length === 0){
            delete item.children;
       }else{
          if(item.children) fn(item.children);
       }
    }
   return arr;
}
fn(obj.children);