Common B/W Array

const arr1 = [1,2,3,4,5];
const arr2 = [7,6,51];

function findCommon(arr1, arr2){
    for(let i=0;i<arr1.length;i++){
        for(let j=0;j<arr2.length;j++){
            console.log(arr1[i],' ',arr2[j]);
            if(arr1[i]==arr2[j])
                return true;
        }
    }
    return false;
}

function findCommon2(a1, a2){
    const obj = new Set(a2);
    for(let a of a1){
        if(obj.has(a)){
            return true;
        }
    }
    return false;
}

function fc(a1, a2){
    return a1.some(item => a2.includes(item));
}

let bool = fc(arr1, arr2);
console.log(bool);