Workshop › Bomberman-style Arena › Step 36 of 42

Pick them up

What we are doing

Walking onto an uncovered power-up takes it: it leaves the map and adds one bomb or one tile of flame.

```js
function pickUp() {
  const t = tileOf(player)
  const item = items.get(key(t.r, t.c))
  if (!item || grid[t.r][t.c] !== ' ') return
  items.delete(key(t.r, t.c))
  if (item === 'bomb') maxBombs += 1
  else power += 1
}

  pickUp()
```

What it means

• pickUp looks at the item on the player's tile. With no item, or with its crate still there, it does nothing.
• Otherwise the item is removed from the map, so it can only be taken once, and the power grows.
• update calls it right after moving the player.

Your turn

1. Above function dropBomb() { write pickUp.
2. In update, under updatePlayer(), write pickUp().

Skills: Game states

← Uncover the power-ups Show the powers →

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