Errata

In the "SpeakTo" method there is a call to the "TellMe" method. Off to the sde there is a not that says, "This method in the Elephant class calls another elephant's TalkTo() method. It lets one elephant communicate with another one."

I'm assuming the "TalkTo()" method is really referring to the "whoToTalkTo()" method. If not, I can not find what other "TalkTo()" method that is being discussed.

Note from the Author or Editor:
In the annotation, change "TalkTo() method" to "TellMe() method"

Change labelCost to costLabel in the bottom annotation.

The 2 examples the notes point to at the bottom of the page are missing completely.

The XML summary comment for the "private readonly int age;" declaration should read:

/// <summary>
Read-only backing field for the Age property
/// </summary>

Note from the Author or Editor:
In the comment on the second line of this code block:

/// <summary>
/// Read-only backing field for the Name property
/// </summary>
private readonly int age;

Change "Name" to "Age"

There is two Step 5, last one should be step 6.

Note from the Author or Editor:
Change the last step number from (5) to (6)

There's two #2 step.

Note from the Author or Editor:
Change the third bullet from (2) to (3)

Second sentence of last paragraph says: "That's why are really useful."

Perhaps you meant to say, "That's why they are really useful."

Note from the Author or Editor:
Insert the word "objects" and make it boldface into that sentence: That's why objects are really useful.

The last sentence in the first paragraph reads: "That's why Mike stuck them together into one class, and called that class ."

It should read: "That's why Mike stuck them together into one class, and called that class Navigator."

Note from the Author or Editor:
Change the sentence to

"That's why Mike stuck them together into one class, and called that class Navigator."

The seventh line of code on the List side of the table on pg. 337 reads:

Guy o = myList[1];

but the instructions for the Exercise state, "Assume these statements are all executed in order, one after another." The plain understanding of this notation is that the List object myList referenced here is the same as the List object declared at the start of the exercise:

List<String> myList = new List <String>();

The problem here is the Guy is not String, so this assignment does not work, it doesn't get any better when the reader is expected to create a version of this statement for an array (also of type String). The statement should read:

String o = myList[1];

This is all repeated in the Exercise Solution on pg. 338.

Note from the Author or Editor:
Change the three occurrences of "Guy o = myList[1];" on pages 337 and 388 to: Guy o = guys[1];

All the example code in the box at the bottom of the page is missing. Everything around the box including graphic annotations is there but the code is missing. Here is a link to a picture: http://s916.photobucket.com/albums/ad8/atyannikov/?action=view&current=photo1.jpg

Thanks

Under the section "Some methods have a return value", two side notes point to what are supposed to be code examples but the areas of the page being pointed to are blank.

doRisky() should be changed to DoRisky()

Note from the Author or Editor:
In the lower left-hand annotation, change doRisky() to DoRisky()

After the first method declaration, all method declarations have a semicolon after the curly braces:

class Navigator
{
public void SetCurrentLocation(string locationName) { ... }
public void SetDestination(string destinationName) { ... };
public void ModifyRouteToAvoid(string streetName) { ... };
public string GetRoute() { ... };
}

All of these semicolons are syntax errors.

Note from the Author or Editor:
Remove the three semicolons from the ends of those three lines

First sentence, "Here's the form for the code" should read "Here's the code for the form" since step 2 instructed you to build the form and step 3 provides the code to apply to the form.

Note from the Author or Editor:
Change "Here's the form for the code." to "Here's the code for the form."

The solution for the Pool Puzzle shows the Snippet of Poem = Poem + "a"; without a space but on the pg 80 the snippet shows the Poem = Poem + "a "; with a space. The solution is correct without the space. Not sure if it will affect the alternative solution.

Note from the Author or Editor:
In the pool at the bottom of the page, in this line: Poem = Poem + ?a ?;

remove the extra space after "a"

Note currently reads: Of course, one method in a single class can throw a method that's caught by another method in the same class.

It should read: Of course, one method in a single class can throw an exception that's caught by another method in the same class.

Note from the Author or Editor:
In the upper right-hand annotation, change "throw a method" to "throw an exception"

The second using statement should read:

using (StreamWriter writer = new StreamWriter("email.txt"))

In the printed version it reads:

using (StreamWriter writer = new StreamReader("email.txt"))

Note from the Author or Editor:
In the bottom block of code, change this: StreamReader(?email.txt?)
to this: StreamWriter(?email.txt?)

The text says "The FunnyThingIHave set accessor should return the same thing.". Shouldn't this refer to the "get" accessor? Similarly, the first hand-written note in the Exercise Solution on page 290.

Note from the Author or Editor:
In the last line of the first paragraph under (3) on 289, change "set accessor" to "get accessor". Also, make the same change to the third line of the top annotation of page 290.

There's a line through the code "(int)" -- this should be an underscore

In the subclass Venus, the method declaration is incorrect. It does not have a return type.

The return type should be void:

public override void SetMissionInfo(....

Note from the Author or Editor:
In the bottom code block, change "public override SetMissionInfo" to "public override void SetMissionInfo"

I think you're missing an extra closing parenthesis on each of the three "cards.Add" lines.

Note from the Author or Editor:
In step #2, add extra closing parentheses before the semicolons, so each line ends with ));

word has 2 "L"s, i.e. "quallity", but should only have 1.

Note from the Author or Editor:
This is the most ironic errata so far. Please change the word "quallity" to "quality".

2nd Edition:

The call to the DrawString methods should pass font as a parameter instead of Font to use the local variable.

Current text:
e.Graphics.DrawString("First page", Font, Brushes.Black, 0, 0);
and
e.Graphics.DrawString("Second page", Font, Brushes.Black, 0, 0);

Should be:
e.Graphics.DrawString("First page", font, Brushes.Black, 0, 0);
and
e.Graphics.DrawString("Second page", font, Brushes.Black, 0, 0);

also, the initial position of either the bee or the text should be moved so they don't overlap on the page. Currently they both have their origin set to 0,0.

Note from the Author or Editor:
Change the two lines of code as specified (replace "Font" with "font").

Add this sentence to the end of the bottom left hand-written annotation (the one that starts with "The Nearby() method..."):
You'll also need to add a similar overload for the Move() method.

Change this text: So add another button to your program, and we'll show you how to use BinaryWriter() .
To this: So let's create a new Console application that uses BinaryWriter to write binary data to a file.
(Make sure that the word BinaryWriter is in Courier New font.)

Figure after equals sign should be 54, not 94.

Note from the Author or Editor:
Change 94 to 54

Annotation reads "This method's signature matches ReturnsAString."

Should be "This method's signature matches ConvertsIntToString." to match the delegate name.

Note from the Author or Editor:
In the third annotation from the bottom, changes ReturnsAString to ConvertsIntToString

Replace "a container" with "containers".

There should be 2 more lines at the bottom of the exercise table for the "while" definition.

Note from the Author or Editor:
Add two more rows to the bottom of the table so the reader can write in them.

I don't understand floats and doubles. Specifically, I don't understand the line: double myFloat = 16.4D;

Why do you add a "D" to the end of the number? I would think you would add an "F" to indicate a float. Why are you telling the compiler it's a float and not a double, when it IS a double? If the only difference between float and double is that the double holds more decimal places, what difference does it make anyway? Why can't you just put in 16.4? What would happen if you did?

Note from the Author or Editor:
Change the second line of code in the block near the bottom of the page to "float myFloat = 16.4F;"

Change the annotation to: When you?re assigning a number value to a float, you need to add a F to the end of the number to tell the compiler that it?s a float, and not a double. Otherwise, the code won't compile.

2nd edition

The method call in the constructor is misspelled.

Change "SetMissinInfo" to "SetMissionInfo".

Note from the Author or Editor:
Change SetMissinInfo to SetMissionInfo in the block of code at the bottom of the page

The book has this:

public Player(Game game, Point location); <--this semicolon not correct
: base(game, location) {
hitPoints = 10;
}


I believe this is correct:
public Player(Game game, Point location)
: base(game, location) {
hitPoints = 10;
}

Can you please let me know if this is an error or if I just got this wrong?

Thanks!

MB

Note from the Author or Editor:
Remove the semicolon from the end of this line: public Player(Game game, Point location);

"Typo" #1
The code says:

Shoe thirdShoe = shoeCloset[3];
Shoe secondShoe = shoeCloset[2];

This is a bit misleading, as the shoeCloset index numbers start at zero, not one. Thus, the two Shoe variables actually contain the 4th and 3rd list elements.

Typo #2
The note at the bottom of the page reads:

"We only added thirdShoe into the cleared list, not fifthShoe"

As there is no fifthShoe variable, I believe they should have said "secondShoe".

Note from the Author or Editor:
Change the [3] and [2] to [2] and [1] in the first two lines in the second to last block of code on the page, so they look like this:
Shoe thirdShoe = shoeCloset[2];
Shoe secondShoe = shoeCloset[1];

In the annotation at the bottom of the page, change fifthShoe to secondShoe

The comment in line 3 says: // An instance of Bet() that has his bet

Bet() is the constructor, not the class. That's why it should be Bet.

Note from the Author or Editor:
In the third line of code on the page, change "An instance of Bet() that has his bet" to "An instance of Bet that has his bet"

The text reads: You can pin it so it says open

We should probably read: You can pin it so it stays open

Note from the Author or Editor:
In the annotation, change "says open" to "stays open"

You have an extra curly bracket. Either remove it from the "code magnet" on the while loop and the answer is correct or remove the extra curly bracket you have them write in after the while line. You'll probably also have to modify page 74 since if you remove it from the while the magnet changes, but if you keep it and change adding the extra curly bracket the text says to "add a couple" and this would be confusing.

Note from the Author or Editor:
On pages 74 and 82, remove the { from the "while (x > 0) {" magnet

I could be wrong but

"Even though the code treats NumberOfCows like
a field, it runs the set accessor, passing it 20.
And when it queries the BagsOfFeed field it runs
the get accessor, which returns 300"


I believe that is wrong.. because in the set accessor 20 is the number of cows and 30 is the multiplier. So running the BagsOfFeed property after will return 600. Also I am not sure why you call BagsOfFeed a field since it is a property since you are using Pascal case and talking about it's get accessor (even though we don't see the code for it).

Note from the Author or Editor:
In the bottom line of the annotation on the bottom of the page, replace "which returns 300." with "which returns 20 * 30 = 600."

After the fourth block of code ("myDate = (DateTime) myNullableDate;") add the following line of body text, followed by another indented block code (which should be in the same large bold Courier font as the second block of code earlier on the page):

[Body text]
But you also get this handy Value property--it also returns the value:

[Indented block of code, in larger bold Courier font]
myDate = myNullableDate.Value;

To make room for this addition, reduce line spacing for the second block of code ("bool? myNulableInt = null; ... DateTime? myNullableDate = null;"). If that doesn't give you enough space, you can remove the line break in the body text in between "that returns true if it's not null." and "You can always convert a value type to a nullable type:".

Please add the following text at the bottom of the page 54 in Arial Black 10pt (or another font, if it looks better):

C# is case sensitive! Make sure your uppercase and lowercase letters match example code.

(The words "case sensitive" should be in 80% gray, the rest in 100% black.)

Change this text: type this query into its event handler
to this: type this query into the Main() method

On page 395, add a box with Arial Rounded MT Bold 9pt text to the lower right-hand corner (make the word "switch" in the first sentence boldface).

This is a switch statement. It's a lot like an if/else statement, except instead of executing certain statements if a value is true or false, it compares a value against a bunch of different options. In this case, it checks the direction enum, and executes different statements based on its value. You'll learn more about switch statements in the next chapter. (Flip to page 435 for a sneak peak!)

"from that point on would be pretty different from you expected"
Should be:
"from that point on would be pretty different from WHAT you expected"

Cheers guys, very good book !

The book says in an anonation:

"You can cast an int back to a trickScore. Since value is equal to 30, score gets set to TrickScore.Fetch. So when you call score.ToString(), it returns 'Fetch'".

But 30 is the value of TrickScore.Speak and not of TrickScore.Fetch.
I have compiled the program and it returns "Speak".

Thus, the anotation should be:

"You can cast an int back to a trickScore. Since value is equal to 30, score gets set to TrickScore.Speak. So when you call score.ToString(), it returns 'Speak'".

Thanks.

Note from the Author or Editor:
Submitter is correct -- make the change as specified.

The book says:
"Here's the architecture for two of your objects, frontYard and diningRoom".
In my opinion, the two objects are "front Yard and livingRoom".
(diningRoom hasn't any door).

Thanks.

Note from the Author or Editor:
In the first sentence in the body text under #6, change the last word from diningRoom to livingRoom.

In the second code line, a '{' is absent.
It must be:
"public void ShopTillYouDrop() {"
instead of
"public void ShopTillYouDrop()"

Thanks.

Note from the Author or Editor:
Add a { to the end of the second line of the code block, just like the submitter suggested:
public void ShopTillYouDrop() {

There's supposed to be a block of text, but it only has a few words. It looks like only the text that's in Courier managed to make it in; the text in Arial Rounded MT Bold got deleted. This isn't your fault. I've seen this before -- it's a bug in InDesign that causes all of the text in a text box in a certain font to disappear. Here's how to fix it.

It currently says: using System.Windows.Forms;using System.Drawing;public

It should say:

You'll need to add "using System.Windows.Forms;" to the top of the Greyhound and Guy classes. And you'll need to add "using System.Drawing;" to Greyhound (because the code on the bottom of this page uses Point, which is in that namespace). You'll also need to add the public keyword in front of each of your class declarations.

("using System.Windows.Forms;", "using System.Drawing;", and "public" are Courier, and the rest are Arial Rounded MT Bold)

The last sentence of the Watch It! box has two "the"'s in series: "...can become null between the the null check..."

Bold text says "Create a Windows Application project...", should say "Create a Windows Forms Application project..."

The wording in the first paragraph to set up the first project can be confusing. From my own experience first learning Visual Studio, I know that it can be easy to overlook the name field at the bottom of the screen. Changing this paragraph can help lessen that potential confusion.

Specifically: Remove the sentence "Name your project "Contacts" and click OK." Then in the next sentence, direct the reader to the bottom of the page to enter the project name.

Note from the Author or Editor:
In the first paragraph on page 8, add the following to the end of the last sentence:

by entering it in the "Name" box at the bottom of the "New Project" window.

(You may need to move the screenshot, Watch It! window, and everything else on the page down a little to make room.)

There's a typo where "NameCollection()" should be changed to "NameEnumerator()" in the first line of code in the block in the middle of the page.

There are two capitalization errors on p750 and p751 where "age" should be capitalized to "Age". The first is in the bottom line of code on p750 (other.Age == Age) and the second is in the second line of the GetHashCode() method on p751 (int result = Age;).

Remove the { curly bracket from the end of this line of code: foreach (var row in results){

The bottom two paragraphs (starting with "After it's done") should be replaced with this to correct a typo (filenames should still be in Courier):

After it's done, your folder should contain a new file called ContactDB.dbml. Use "Add Existing Item" to add ContactDB.dbml to your project (again, select "Data Files" from the file type filter drop-down). When you add that file, the IDE automatically creates two more files: ContactDB.designer.cs, and ContactDB.dbml.layout.

In the first line of #3, change "button" to "Main() method": Add a Main() method that makes some copies of Dogs and Canines
Change the first line of #4 to: Before you run the program...

In the last line of code on the page, ID is miscapitalized -- it should be Id (with a lowercase "d"): "Clone #" + Id + " says...");

In the second line of code, this text: new Bitmap("c:\..." is missing the @ before "c:\...."
It should look like this: Bitmap photo = new Bitmap(@"c:\Graphics\fluffy_dog.jpg");

Remove "Bee." from this line of code: world = new World(new Bee.BeeMessage(SendMessage));
So it looks like this: world = new World(new BeeMessage(SendMessage));

In p576 of the second edition, there's some unnecessary code at the top of the code block that should be replaced -- it does not affect the content of the chapter at all.

Replace the 13 lines of code starting with " // variable declarations" and ending just above the boldfaced code (the last line is a } on a line by itself) with the following:

// The existing code from the form remains unchanged.

Leave the boldfaced code (starting with "private void startSimulation_Click") unchanged.

In the second edition on p522, there's a sentence missing from the paragraph just above the screenshot that starts "Now rebuild your code." Here's what that paragraph should look like:

You'll also need to change the OnBallInPlay method to replace EventHandler with EventHandler<BallEventArgs>. Now rebuild your code. You should see two errors in the Error List window:

(The text "EventHandler" and "EventHandler<BallEventArgs>" should be in Courier. There's room to move everything else on the page down to make room.)

Also, in the heading near the bottom of the page ("Use implicit
conversion...") there's a line above the word "new" -- this is an
underline, and it should be moved down below the word "new".

On pages 493 and 494, there's a magnet with the text "doRisky(test);" with a typo. The "d" should be uppercase: "DoRisky(test);"

In the box on p244 of the 2nd edition, replace this sentence:

You can read more about console applications in Appendix A.

with this (you may need to expand the box downwards for it to fit, but there's plenty of room):

You'll get a lot of practice using console applications over the next few chapters.

(This is the author reporting errata.)

In the middle of the page, in this line of code:

List<Duck> ducks = new List<Duck>() { // initialize your list as usual }

Replace "// initialize your list as usual" with "/* initialize your list as usual */"

So the line should look like this:

List<Duck> ducks = new List<Duck>() { /* initialize your list as usual */ }

(This is the author submitting errata.)

In the second edition, on page 154, in this line of code:

MessageBox.Show(whoSaidIt.Name + " says: " + message,);

There's an extra comma at the end of the line -- it should be:

MessageBox.Show(whoSaidIt.Name + " says: " + message);

(This is the author submitting errata.)

In the second edition, on page 137 in step #2, in this line of code:

Messagebox.Show(milesTraveled + " miles", "Miles Traveled");

the "b" in should be uppercase in "MessageBox".

(This is the author submitting errata.)

In this line of code in the second code block at the top of page 354:


Console.WriteLine(duck.Size.ToString() + "-inch " + Kind);

replace "Kind" with "duck.Kind.ToString()"

Also, change this annotation: The + operator automatically
calls the KindOfDuck enum's ToString() method.
to this: You can also leave off ".ToString()" and the + operator will
call it automatically.