SOURCE

//手写call
/*Function.prototype.myCall= function(obj,...arr){
    obj.fn = this;
    obj.fn(...arr);
    delete obj.fn;
}
let csss = {
    k:function(...arr){
        let s="begin:";
        arr.forEach((value)=> s+=value);
        console.log(this.name+"2"+s)
    }
}
let obj = {
    name:"2",
}
csss.k.myCall(obj,1,2,3,5);*/
//手写apply
/*Function.prototype.myApply= function(obj,arr){
    obj.fn = this;
    obj.fn(arr);
}
let csss = {
    k:function(arr){
        let s="begin:";
        arr.forEach((value)=> s+=value);
        console.log(this.name+"2"+s+this.name)
    }
}
let obj = {
    name:"2",
}
csss.k.myApply(obj,[1,2,3,5]);*/
//手写bind
/*Function.prototype.myBind= function(obj=window,...arr){
    obj.fn = this;
    var ff =function(){
        obj.fn(arr);
    }
    return ff;
}

let csss = {
    k:function(...arr){
        let s="begin:";
        arr.forEach((value)=> s+=value);
        console.log(this.name+"2"+s)
    }
}
let obj = {
    name:"2",
}
csss.k.myBind(obj,1,2,3,8)();*/
//json字符串和对象相互转化
/*var s = {
    name :2,
    fn : function(){
        return "fn";
    },
    age:"5",
}
let tt = JSON.stringify(s);//对象转化为字符串
let ss = JSON.parse(tt);//字符串转化为对象
let kk = eval("("+tt+")")//字符串转化为对象
console.log(kk);*/
//对象的深拷贝:递归实现

/*let b = {bname:"b",
        bage:"b111"};
let a  = {
    name:111,
    test:b,
    qq:[1,2,3,4,5],
}
let c = {};
function deepClone(sourceobj,targetobj){
    let cloneObj = targetobj|| {};
    for(key in sourceobj){
        if(sourceobj[key] instanceof Object && sourceobj[key]!=null){
            cloneObj[key] =
            deepClone(sourceobj[key],cloneObj[key]);
        }
        if(sourceobj[key] instanceof Array){
            cloneObj[key] = sourceobj[key].concat();
        }
        else{
            cloneObj[key] = sourceobj[key];
        }
    }
    return cloneObj;
}
deepClone(a,c);
a.test.bage = 2;
console.log(c.test.bage);
console.log(c.qq[4]);*/
/*let a ={
    name:"2",
    age:100,
    toString:function(){
        return 22;
    },
}
let c = eval("("+JSON.stringify(a)+")");
a.name = "50";
console.log(a.name)*/

//一层深拷贝
/*let a ={name:22,}
let c = Object.assign({},a);*/
function rund(min,max,N){
    let a = [];
    if(N>max-min){
        return null;
    }
    while(N--){
        var temp = (Math.random()*(max-min))/0.1+min;
        if(a.indexOf(temp)==-1){
            a.push(temp)
        }else{
            N++;
        }
    }
    console.log(a);
}
rund(1,5,2);