TypeScript-class学习笔记---遍历Tree

//这样声明一个方法居然报错
// createPrefix(n:number):string {
//     return '--'.repeat(n)
// }


function  createPrefix(n:number):string {
    return '--'.repeat(n)
}

// class XXX {
//     public children = []

//     constructor (public name : string){}
//     addChild(){
//         console.log('object');
//     }
//     introduceFamily(){
//         console.log('22');
//     }
// }

{
    class Person {
        //Person[] 传入的参数，必须是new Person这个对象的，或者有它的所有方法如上class XXX....
        public children:Person[] = []  //默认值[]


        // constructor(public name: string) {}
        //加public相当于简写
            //name :string
            //constructor(name){
                // this.name = name
            // }


        constructor(public name: string) {}
        addChild(child:Person):void {
            this.children.push(child);
        }

        introduceFamily(n?:number):void{
            n = n || 1
            console.log(`${createPrefix(n-1)}${this.name}`);
            this.children.forEach(child =>{
                //有子代就加1
                child.introduceFamily(n+1)
            })
        }
    }
    
    let grandPa = new Person('孙悟饭');
    let child1 = new Person('孙悟天');
    let child2 = new Person('孙悟空');
    let person1 = new Person('孙悟静');
    let person2 = new Person('孙悟');
    let person3 = new Person('孙悟芳');
    
    grandPa.addChild(child1)
    grandPa.addChild(child2)
    
    child2.addChild(person1)
    child2.addChild(person2)
    child2.addChild(person3)
    grandPa.introduceFamily(1)


//可运用与类似循环遍历家谱、找文件夹等等，这样一级一级的结构
}