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In this video we'll see how we can check the suits of our cards, and then we'll finish up the 'addCards' function!

Getting back to our suitCheck function. 0:00 Let's use our new properties to help us determine if the two cards 0:02 are different colors, which can only happen in two ways. 0:06 Either card one is red, and card two is black, or card one is black, and 0:09 card two is red. 0:14 So let's type if and then add our brackets. 0:15 Then inside the if statement, let's add parentheses for 0:20 our first case then add an or and add parentheses for our second case. 0:24 Then let's jump back to our first case. 0:30 And check if c1 is red by seeing if its suit is 0:33 contained by our redSuits property. 0:36 So redSuits.contains c1.suit. 0:39 Then let's add an and and check if c2 is black. 0:44 blackSuits.contains c2.suit. 0:51 Now we just need to handle the second case where card one is black and 0:56 card two is red, and I'll put this on a new line so it's easier to see. 1:00 So inside our second case parentheses, 1:04 let's type blackSuits.contains c1.suit and 1:09 redSuits.contains c2.suit. 1:15 And there we go. 1:19 Our suitCheck function is basically finished. 1:20 We just need to add return true inside our if statement, and 1:23 then add return false at the bottom of the function. 1:27 Jumping back to our addCards function, if this if statement is true, 1:31 then we want to add the new cards to our current cards and return true. 1:36 So, inside this if statement, let's update our tableau 1:41 pile by typing cards.addAll and passing in our new cards list. 1:46 Then let's return true to let our model know that it was a success. 1:52 Finally, let's return false at the end of this function. 1:57 And we should be done, right? 2:02 Not quite. 2:03 We still need to handle the case where our tableauPile is empty. 2:05 Remember, an empty tableauPile will only accept a king as the first card. 2:09 Also, as we have it now, 2:14 an empty tableauPile will give us an error when we try to use cards.last. 2:15 There's no last card in an empty pile. 2:20 To fix this, let's only evaluate our if statement if our Cards property 2:23 actually has cards in it. 2:28 At the top of the function, let's type if cards is 2:29 greater than 0, add the left bracket and 2:34 then let's add the right bracket, down here. 2:38 Next let's add an else if to handle if a king is being played. 2:45 Else if (newCards.first().value 2:49 == 12, which is the value of a king. 2:55 And finally, inside the else if, let's just copy and 3:02 paste these two lines from up here. 3:05 And there we go. 3:15 Now when we run this function, if there are cards in the tableau pile and 3:16 the first new card meets these criteria, 3:22 then we'll add the new cards and return true. 3:25 On the other hand, if this tableau pile is empty but 3:29 the first a new card is a king, then we'll also add the new cards and return true. 3:33 Otherwise, whatever cards we're trying to add aren't a match. 3:41 So we'll just return false. 3:45 We're finally done with the addCards function and 3:47 all that remains is figuring out how to remove cards from our tableau pile. 3:50 In the next video, we'll see how we can do that, and 3:54 along the way, we'll learn all about for loops in Kotlin. 3:57

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