var allActive = [{id: 1, active: true}, {id: 2, active: true}, , {id: 3, active: true}];
var someNot = [{id: 4, active: true}, {id: 5, active: true}, , {id: 6, active: false}];

for(var index = 0, student; student = array[index]; index++){
 if(stduent.active){
  return false;
 }
}