Implementing Shooting Through Operators and Observables
Learn to implement shoot functionality using the merge Observable and controlling it through the timestamp operator.
It’s a bit scary seeing the hordes of enemies coming at us, but all we can do is move out of the way and hope they don’t see us.
How about we give our hero the ability to shoot at the evil alien spaceships?
We want our spaceship to shoot
whenever we click
the mouse or press
the spacebar, so we’ll create an Observable for each event and merge
them into a single Observable called playerShots
. Notice that we filter the keydown
Observable by the key code of the spacebar, 32
:
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