doinit.js

doInit : function(component, event, helper) {
  var action = component.get("c.getRecentRecords");
  var fields = component.get("v.fields");
  action.setParams({
    ObjectName : component.get("v.object"),
    limits : component.get("v.limit"),
    fieldstoget : fields.join()
  });
  action.setCallback(this,function(response){
    // Logic to process the returned value          
  });
  $A.enqueueAction(action);
}