const createCashe =()=>{
    var array =[];
    put = (a)=>{
        array.push(a);
    }
    has =(a) =>{
        if(array.indexOf(a)=='-1'){
            return false;
        }else{
            return true;
        }
    }
    return {
        put:put,
        has:has
    }
}
const cashe = createCashe();
cashe.put(1);
cashe.put(2);
cashe.put(3);
cashe.put(8);
console.log(cashe.has(10));