Question

I need to test whether each item in an array is identical to each other. For example:

var list = ["l","r","b"]

Should evaluate as false, because each item is not identical. On the other hand this:

var list = ["b", "b", "b"]

Should evaluate as true because they are all identical. What would be the most efficient (in speed/resources) way of achieving this?

Answer 1

function identical(array) {
    for(var i = 0; i < array.length - 1; i++) {
        if(array[i] !== array[i+1]) {
            return false;
        }
    }
    return true;
}