Workshop › Klondike Solitaire › Step 15 of 40

Go through the stock again

What we are doing

When the stock is empty, turning it over again takes the whole waste back, face down, so you can go through it again. It must come back in the same order, as with real cards: the waste is flipped over like a real pile.

```js
} else {
  // An empty stock takes the waste back, face down, in the same order as before.
  piles.stock = piles.waste.reverse().map((card) => ({ ...card, up: false }))
  piles.waste = []
}
```

What it means

• reverse() flips the order of an array: the first card turned over ends up last in the new stock, so it comes out first again.
• map makes a new array by changing every item; { ...card, up: false } is a copy of the card with up set to false. The object is in parentheses so the arrow function returns it.
• The waste becomes empty.

Your turn

In flipStock, after the if block's closing }, add the else block.

Skills: Arrays and objects

← Space turns a card What is under the pointer? →

All steps

1. The green table
2. Draw one card
3. The face of a card
4. Red and black
5. A deck of 52
6. Shuffle
7. Piles in one object
8. Deal the seven columns
9. A place for every pile
10. Put the piles on the table
11. Fan out the columns
12. Outlines for empty places
13. Turn over a card
14. Space turns a card
15. Go through the stock again
16. What is under the pointer?
17. Hitting a card in a column
18. Tap the stock
19. Rule 1: building a column
20. Rule 2: building a foundation
21. Move cards by the rules
22. Turn over the uncovered card
23. Find where a card goes
24. Pick up a card
25. Tap to move
26. A move counter
27. Count the moves
28. Where did you grab it?
29. Follow the pointer
30. Draw the held cards at the pointer
31. Drop it where you want
32. Drop a king into an empty column
33. A clock
34. Winning
35. You won!
36. A new game
37. The best time
38. Snapshots of the table
39. Undo
40. Build it yourself: finish by itself