How to access array in circular manner in JavaScript

Question

I have an array like [A,B,C,D]. I want to access that array within a for loop like as

var arr = [A,B,C,D];

var len = arr.len;
for(var i = 0;i&         


        

Answer 1

for (var i = 0; i < arr.length; i++) {
    var subarr = [];
    for (var j = 0; j < 3; j++) {
        subarr.push(arr[(i+j) % arr.length]);
    }
    console.log(i + " - " + subarr.join(','));
}