Simple Collision method

Questions & Answers
1

How i normally do collision is as follow:

Box box[];
Circle cir[];

for (int i = 0; i < box.size(); i++) {
   for (int j = 0; j < cir.size(); j++) {
      if (box*.IsCollideWith(cir[j])) {*

{
//Do something
}
}
}
How would i write something like this on JSUnity, obviously Box an Circle class are gameobject.
Thank you

2