## digitalmars.D.learn - Learn to Tango with D - Errata & Questions

• AEon (26/26) Sep 20 2008 Carefully reading and testing the examples in "Learn to Tango with D"
• Denis Koroskin (3/29) Sep 20 2008 Yes, it is a typo. Take a look here:
• AEon (6/13) Sep 20 2008 Thanks. Even though it does mention 2 extra typos, compared to
• torhu (4/17) Sep 20 2008 When I wrote that page I just included what I considered serious errors,...
• AEon (5/23) Sep 20 2008 I seem to have suggested that over in the forums:
AEon <aeon2001 lycos.de> writes:
```Carefully reading and testing the examples in "Learn to Tango with D"
made me stumble across a few things I did not quite understand. A
internet search revealed:

Errata for 'Learn to Tango with D'
(http://www.dsource.org/projects/dallegro/wiki/TangoBookErrata)

That explained a few "confusing" things.

But there is still one entry I think is a typo, but I'd like to ask
the programmers here, if it is indeed a "bug".

On p33, Slicing, these examples are given.
---
int x[] = [0,1,2,3,4];
int y[] = x[1..x.length];

int z[];
z = x[1..x.length-1];

int all = x[];   // all is a view of all of x, from the first //L13
// element to the last, i.e., 0, 1, 2, 3, 4.
---

To me the last line makes no sense, it should read:

int all[] = x[];

and dmd v1.030 agrees. The code from the book yields a compile error:

Error: p33_slice_test.d(13): Error: cannot implicitly convert
expression (x[])  of type int[]  to int

So is it indeed a bug?

(I'll be posting the other questions in this thread, later on.)
```
Sep 20 2008
"Denis Koroskin" <2korden gmail.com> writes:
```On Sat, 20 Sep 2008 19:41:57 +0400, AEon <aeon2001 lycos.de> wrote:

Carefully reading and testing the examples in "Learn to Tango with D"
made me stumble across a few things I did not quite understand. A
internet search revealed:

Errata for 'Learn to Tango with D'
(http://www.dsource.org/projects/dallegro/wiki/TangoBookErrata)

That explained a few "confusing" things.

But there is still one entry I think is a typo, but I'd like to ask
the programmers here, if it is indeed a "bug".

On p33, Slicing, these examples are given.
---
int x[] = [0,1,2,3,4];
int y[] = x[1..x.length];

int z[];
z = x[1..x.length-1];

int all = x[];   // all is a view of all of x, from the first //L13
// element to the last, i.e., 0, 1, 2, 3, 4.
---

To me the last line makes no sense, it should read:

int all[] = x[];

and dmd v1.030 agrees. The code from the book yields a compile error:

Error: p33_slice_test.d(13): Error: cannot implicitly convert
expression (x[])  of type int[]  to int

So is it indeed a bug?

(I'll be posting the other questions in this thread, later on.)

Yes, it is a typo. Take a look here:
http://www.dsource.org/projects/tango/wiki/LearnToTangoWithD
```
Sep 20 2008
AEon <aeon2001 lycos.de> writes:
```Denis Koroskin wrote:

To me the last line makes no sense, it should read:

int all[] = x[];

and dmd v1.030 agrees.

Yes, it is a typo. Take a look here:
http://www.dsource.org/projects/tango/wiki/LearnToTangoWithD

Thanks. Even though it does mention 2 extra typos, compared to

http://www.dsource.org/projects/dallegro/wiki/TangoBookErrata

it's strange that "my" bug has been missed so far. Will try to update
the Errata page (if that is possible).

AEon
```
Sep 20 2008
torhu <no spam.invalid> writes:
```AEon wrote:
Carefully reading and testing the examples in "Learn to Tango with D"
made me stumble across a few things I did not quite understand. A
internet search revealed:

Errata for 'Learn to Tango with D'
(http://www.dsource.org/projects/dallegro/wiki/TangoBookErrata)

That explained a few "confusing" things.

But there is still one entry I think is a typo, but I'd like to ask
the programmers here, if it is indeed a "bug".

When I wrote that page I just included what I considered serious errors,
I didn't bother to include the obvious typos.  I guess I should merge my
page into the Tango team's errata page, though.
```
Sep 20 2008
AEon <aeon2001 lycos.de> writes:
```torhu wrote:
AEon wrote:
Carefully reading and testing the examples in "Learn to Tango with D"
made me stumble across a few things I did not quite understand. A
internet search revealed:

Errata for 'Learn to Tango with D'
(http://www.dsource.org/projects/dallegro/wiki/TangoBookErrata)

That explained a few "confusing" things.

But there is still one entry I think is a typo, but I'd like to ask
the programmers here, if it is indeed a "bug".

When I wrote that page I just included what I considered serious errors,
I didn't bother to include the obvious typos.  I guess I should merge my
page into the Tango team's errata page, though.

I seem to have suggested that over in the forums:

http://www.dsource.org/projects/tango/forums/topic/606

Oh well :)

AEon
```
Sep 20 2008