用js，或jquery进行双层for循环

Question

就是var a="1,2,3";var b="1,2,3";
for(){ 双层for循环，怎么让其1--1，2--2，3--3对应
for(){
}
}

Answer 1

    var a='1,2,3';
    var b='1,2,3';
    var array1=a.split(",");

    var array2=b.split(",");
    for (let index = 0; index < array1.length; index++) {
        const arr1 = array1[index];
        for (let k = 0; k < array2.length; k++) {
            const arr2 = array2[k];
            if(arr1==arr2){
                console.log(arr1,arr2)
            }
        }
    }