1var colors = ["red","blue","green"];
2var green = colors[colors.length - 1];//get last item in the array

1var colors = ["red","blue","green"];
2var green = colors[colors.length - 1];//get last

1.slice(-1)[0] 

1if (loc_array[loc_array.length - 1] === 'index.html') {
2   // do something
3} else {
4   // something else
5}
6
7

1if (loc_array[loc_array.length - 1] === 'index.html') {
2   // do something
3} else {
4   // something else
5}