Workshop › Battleship › Step 25 of 35

Shoot the hottest square

What we are doing

The computer stops guessing at random: it shoots the square with the highest heat.

```js
function computerShoots() {
  const heat = heatMap()
  let bestCell = null
  for (let r = 0; r < N; r++) {
    for (let c = 0; c < N; c++) {
      if (!bestCell || heat[r][c] > heat[bestCell.r][bestCell.c]) bestCell = { r, c }
    }
  }
  const result = fire(myFleet, theirShots, bestCell.r, bestCell.c)
```

What it means

• bestCell remembers the hottest square seen so far; it starts empty (null).
• A square replaces it when there is none yet or it is hotter.
• On a tie the first one found stays.

Your turn

In computerShoots, replace everything from let r to the fire(...) line with the new lines.

Skills: Loops

← A heat map Hunt around a hit →

All steps

1. A 10 by 10 sea
2. A function for any sea
3. Your own sea
4. Draw again and again
5. Grids and ships as lists
6. A random fleet
7. Two fleets
8. Which ship is here?
9. Fire at a square
10. Show the shots
11. Your shot
12. Tap to fire
13. A message line
14. Hit or miss?
15. See your own fleet
16. Sinking ships
17. Darker hits on a sunk ship
18. Outline sunk ships
19. Win in as few shots as you can
20. A record of their shots
21. Take turns
22. The computer shoots back
23. You can lose too
24. A heat map
25. Shoot the hottest square
26. Hunt around a hit
27. See the heat map
28. H for heat
29. Show their ships at the end
30. A keyboard cursor
31. Move with the arrows
32. Fire with Enter, play again
33. Your best game
34. A side panel
35. Build it yourself: ships apart