remov listen eventtyp pair listen list todo replac listen implement event listen list better perform param event event listen listen param listen listen remov remov listen event argo event listen listen listen listen list pair remov list arrai list pair event argo event type event todo linear search list contain thousand item fig entir project pair listen listen listen remov list add pair test pair event listen todo linear search list contain thousand item fig entir project pair listen equal test remov list add listen remov remov list 