去除字符串乱码和 不用循环给数组赋值 自有的时间调度器

一,用正则表达式来将字符串"I?���love�??�the�?great�?�?wall�in��?beijing"更改为:"I love the Great Wall in Beijing",主要是为了解决编码的问题导致的问题,规律:

1,乱码只有两种特殊字符分别是'?'和'�';

2,如果乱码的末尾是'?'则它的下一位字母肯定是大写;

复制代码
let str = "I?���love�??�the�?great�?�?wall�in��?beijing";
    str = str.replace(/�/g, '');
    console.log(str);
    strArr = str.split('?');
    for(var i=0;i<strArr.length;i++){
        strArr[i] = strArr[i].charAt(0).toUpperCase()+strArr[i].slice(1);
    }
    strArr = strArr.join(' ');
    console.log(strArr);
复制代码

二,不使用类似for,while循环控制语句和js本身自带方法(如:forEach)的情况下,实现将一个空数组[]赋值成[0,******************],范围0-100便可。

?
let arr = [];
let num = 0;
function addNum2Arr() {
    if (num<100) {
        arr.push(num);
        num += 4;
        addNum2Arr();
    }
}
addNum2Arr();
console.log(arr)

　　

三,设计一个自由可灵活配置的时间调度器,有a,b,c,d...很多个需要被调度的方法(方法名称的命名可随意),调度有两种形式,一个是顺序调用(例如调度完a后才能调度b),一个是间隔某个时间进行循环调度。用一个统一的方法进行封装可以实现下列的例子:

1,可以为5秒后调用a,3秒后调用b,10秒后调用c，d...z方法不执行(不执行的方法可以设计成不传递参数),那么在第14秒的时候开始重新从0秒循环,又变成第一秒后调用a,3秒后调用b,这样循环往复;

2,每间隔6秒调用一次a,每间隔4秒调用一次b,c...z方法不执行;

3,第一秒先执行a,3秒后执行b,但是c却是每间隔3秒执行一次,d是每间隔4秒执行一次,a和b是每4秒进行一次循环;

4,a不执行,b和c每间隔3秒执行一次,d不执行;

?
class TimeScheduler {
    constructor() {
        this.events = [];
        this.orderCallStack = [];
        this.ownCallStack = [];
    }
    //添加执行栈函数，orderExec用于区别是顺序调用还是独立调用，注意同一个函数存在顺序调用和独立调用时需要add两次
    add(fn = () => {}, orderExec = false, timeout = 3) {
        let fnc;
        if (orderExec) {
            fnc = () => {
                setTimeout(() => {
                    fn();
                    this.next();
                }, timeout * 1000)
            };
        } else {
            fnc = () => {
                setInterval(() => {
                    fn()
                }, timeout * 1000)
            };
        }
        this.events.push({
            fnc,
            orderExec
        })
    }
    remove(fnc = () => {}) {
        this.events = this.events.filter(item => item.fnc === fnc);
    }
    clear() { //清除存储数据及清空调用栈
        this.events = [];
        this.orderCallStack.forEach(item => {
            clearTimeout(item.fnc);
        });
        this.ownCallStack.forEach(item => {
            clearInterval(item.fnc);
        });
        this.ownCallStack = [];
        this.orderCallStack = [];
    }
    start() { //开始执行
        this.orderCallStack = this.events.filter(item => !!item.orderExec);
        this.ownCallStack = this.events.filter(item => !item.orderExec);
        this.ownCallStack.forEach(item => item.fnc());
        this.next();
    }
    stop() { //停止执行
        this.orderCallStack.forEach(item => {
            clearTimeout(item.fnc);
        });
        this.ownCallStack.forEach(item => {
            clearInterval(item.fnc);
        });
        this.ownCallStack = [];
        this.orderCallStack = [];
    }
    next() { //顺序调用栈执行函数
        let obj = this.orderCallStack.shift() || {};
        if (obj.fnc) {
            this.orderCallStack.push(obj);
            obj.fnc();
        }
    }
}
 
let a = () => {
    console.log("a");
}
let b = () => {
    console.log("b");
}
let c = () => {
    console.log("c");
}
const timeScheduler1 = new TimeScheduler();
timeScheduler1.add(a, true, 5);
timeScheduler1.add(b, true, 3);
timeScheduler1.add(c, true, 10);
timeScheduler1.start();

　参考 https://cloud.tencent.com/developer/article/1637007