js输出

 function foo(n){

    if(n<2) return n;
    return foo(n-1)+foo(n-2);
}
let a=foo(6);

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function test(a){
    a=a+10;
}
var a=10;
test(a);
console.log(a);

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var x=1234;
function test(x){
    console.log(x);
    var x=123;
    function x(){
   
    }
    console.log(x);

}
test(444);

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var obj={
    name:'jack',
    fun:function(){
       console.log(this.name);
    }
}
var obj2={
    name:'jay'
}
var fun=obj.fun.bind(obj);
fun.call(obj2);

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function f(n){
    if(n<=3){
        return 1;
    } else{
        return f(n-2)+f(n-6)+1;
    }
}
var a=f(12);
console.log(a);

(function(callback){
    person = {name:'Lily'};
    callback(person);
})(function(obj){
    obj.name = 'Lucy';
    obj = {name:'Marry'};
});

执行后name的值

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const fib=n=>n<=2?1:fib(n-2)+fib(n-1);
console.log(fib(5));

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var user = {
    count:1,
    getCount:function(){
        return this.count;
    }
}
var func=user.getCount
console.log(func());

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