Workshop › Bomberman-style Arena › Step 17 of 42

The fuse burns down

What we are doing

Every frame, every fuse gets one shorter. A bomb whose fuse reaches 0 explodes; for now exploding only removes it.

```js
function explode(bomb) {
  bombs = bombs.filter((b) => b !== bomb)
}

  for (const b of bombs) b.fuse -= 1
  for (const bomb of bombs.filter((b) => b.fuse <= 0)) explode(bomb)
```

What it means

• b.fuse -= 1 takes one frame off each fuse.
• bombs.filter((b) => b.fuse <= 0) makes a list of the bombs whose time is up; each of them explodes.
• explode keeps every bomb except this one: !== means "is not the same".

Your turn

1. Above function update() { write explode.
2. In update, under updatePlayer(), write the two fuse lines.

Skills: Game states, The game loop

← Bombs are in the way Fire! →

All steps

1. Measure the arena
2. A floor of tiles
3. Draw it every frame
4. The arena as data
5. Draw what the grid says
6. Pillars
7. Crates
8. Keep the corners clear
9. The player
10. Keys being held
11. Slide towards a target
12. Walk
13. Drop a bomb
14. Space drops, bombs show
15. One bomb at a time
16. Bombs are in the way
17. The fuse burns down
18. Fire!
19. Flames die down
20. A cross of flames
21. Crates burn
22. Chain reactions
23. Bombs blink
24. Flames hurt
25. A moment of safety
26. Hearts
27. Out of lives
28. Game over
29. Enemies
30. Enemies wander
31. No turning back
32. Fight and touch
33. All enemies gone
34. Hidden power-ups
35. Uncover the power-ups
36. Pick them up
37. Show the powers
38. Which way is the finger?
39. Play with a finger
40. A clock
41. The fastest win
42. Build it yourself: a smarter enemy