David Held:
class Baz
{
override string toString() pure const
{ return cast(Object)(foo).toString(); }
Foo foo;
}
This really makes the compiler go bonkers:
src\Bug.d(11): Error: pure nested function 'toString' cannot
access mutable data 'foo'
src\Bug.d(11): Error: pure nested fu
On 04/19/2014 11:59 AM, steven kladitis wrote:
> I am getting a much clearer picture of arrays
Great! :)
> a D manual or book just for D V2.0.
They are all here:
http://wiki.dlang.org/Books
Ali
On 4/19/2014 5:45 PM, Adam D. Ruppe wrote:
On Sunday, 20 April 2014 at 00:35:30 UTC, David Held wrote:
Since all implementations of an interface must derive from Object
That's not true. They can also come from IUnknown or a C++ interface.
Ok, that's a good reason!
cast(Object)(foo).toS
On 4/19/2014 3:31 PM, Andrej Mitrovic via Digitalmars-d-learn wrote:
[...]
struct S
{
int get() { return 0; }
T get(T)() { return T.init; }
}
void main()
{
S s;
float x = s.get(); // which overload? (currently int get())
}
Isn't this just because concrete methods are bett
On 4/19/2014 5:35 PM, David Held wrote:
interface Foo { }
class Bar : Foo
{
override string toString() pure const { return "Bar"; }
}
void main()
{
Foo foo = new Bar;
foo.toString();
}
To make things more interesting, consider the call to toString() from
inside a class (which
On Sunday, 20 April 2014 at 00:35:30 UTC, David Held wrote:
Since all implementations of an interface must derive from
Object
That's not true. They can also come from IUnknown or a C++
interface.
cast(Object)(foo).toString();
(cast(Object)foo).toString() might work
This might return
interface Foo { }
class Bar : Foo
{
override string toString() pure const { return "Bar"; }
}
void main()
{
Foo foo = new Bar;
foo.toString();
}
src\Bug.d(14): Error: no property 'toString' for type 'Bug.Foo'
Since all implementations of an interface must derive from Object, why
c
On 4/19/14, matovitch via Digitalmars-d-learn
wrote:
> This won't compile :
>
> import std.stdio;
>
> void main()
> {
> Test t;
> t.data = [152, 32, 64, 28, 95];
> float b = t.get;
> writefln("%s", b);
> }
Because it's probably overkill. At some point it becomes too much
m
On Saturday, 19 April 2014 at 17:12:10 UTC, Ali Çehreli wrote:
On 04/19/2014 09:55 AM, MattCoder wrote:
> On Friday, 18 April 2014 at 20:02:41 UTC, Tim Holzschuh via
> Digitalmars-d-learn wrote:
> void main(){
> int myfilter(int a){
> static int[] b;
That static variable makes thi
Fantastic
I am getting a much clearer picture of arrays I appreciate
all of the help
I see many examples of D online, but most do not compile under
2.065. I am wondering if there is a D manual or book just for D
V2.0.
On Saturday, 19 April 2014 at 18:46:28 UTC, matovitch wrote:
On Saturday, 19 April 2014 at 17:49:54 UTC, bearophile wrote:
matovitch:
struct Test
{
immutable (ubyte)[] data;
T get(T)()
{
return *(cast(T*)(&(data[0])));
}
It's better to return
On Saturday, 19 April 2014 at 17:49:54 UTC, bearophile wrote:
matovitch:
struct Test
{
immutable (ubyte)[] data;
T get(T)()
{
return *(cast(T*)(&(data[0])));
}
It's better to return const/immutable data. Otherwise the
program gives undefined r
On Saturday, 19 April 2014 at 18:46:28 UTC, matovitch wrote:
On Saturday, 19 April 2014 at 17:49:54 UTC, bearophile wrote:
matovitch:
I did'nt know that one.
This last sentence is misleading, let be clear : I know almost
nothing when it comes to D...but I'm willing to learn ! ;-)
matovitch:
struct Test
{
immutable (ubyte)[] data;
T get(T)()
{
return *(cast(T*)(&(data[0])));
}
It's better to return const/immutable data. Otherwise the program
gives undefined results. In alternative use mutable ubytes for
data.
Also &da
On Friday, 18 April 2014 at 22:11:17 UTC, bearophile wrote:
This preserves ordering and it's in-place. Not tested much:
void main() {
import std.stdio, std.traits;
auto data = [2, 1, 1, 3, 2, 3];
bool[ForeachType!(typeof(data))] seen;
size_t pos = 0;
foreach (immutable i; 0
Hi everyone !
Let's say I have a struct :
struct Test
{
immutable (ubyte)[] data;
T get(T)()
{
return *(cast(T*)(&(data[0])));
}
}
This code will work :
import std.stdio;
void main()
{
Test t;
t.data = [152, 32, 64, 28, 95];
On 04/19/2014 09:55 AM, MattCoder wrote:
> On Friday, 18 April 2014 at 20:02:41 UTC, Tim Holzschuh via
> Digitalmars-d-learn wrote:
> void main(){
> int myfilter(int a){
> static int[] b;
That static variable makes this solution non-reentrant. To see an effect
of this, replace the
On 04/19/2014 09:14 AM, steven kladitis wrote:
> // does not work
I think you are thinking in terms of C's syntax. Unlike C, array
definition syntax is consistent in D.
I inserted spaces below to make it stand out:
int[] [string] arr;
The definition above is in the following form:
On Friday, 18 April 2014 at 20:02:41 UTC, Tim Holzschuh via
Digitalmars-d-learn wrote:
Hi there,
I try to remove all equal elements of an array, thus [2,2] -->
[2].
I thought this maybe would be possible with
std.algorithm.reduce, but at least the way I tried it doesn't
work:
arr.reduce(
On Saturday, 19 April 2014 at 16:14:45 UTC, steven kladitis wrote:
void main()
{
//inta0[];
int[] a0;
//inta1[][];
int[][] a1;
//string a2[][];
string[][] a2;
//string a3[][string];
string[string] a3;
// string[][string] a3;
// possibly should be above for a3
//string a4[][string][strin
void main()
{
//inta0[];
int[] a0;
//inta1[][];
int[][] a1;
//string a2[][];
string[][] a2;
//string a3[][string];
string[string] a3;
// string[][string] a3;
// possibly should be above for a3
//string a4[][string][string];
string[][string][string] a4;
//string a4[string][string][string]
On 4/19/2014 9:06 PM, FreeSlave wrote:
Note that you don't need to apply toStringz to string literals since
they implicitly cast to const char*.
And, more importantly, are nul terminated.
On Saturday, 19 April 2014 at 12:26:16 UTC, Andrej Mitrovic via
Digitalmars-d-learn wrote:
On 4/19/14, Lars T. Kyllingstad via Digitalmars-d-learn
wrote:
Say I have two structs, defined like this:
struct A { /* could contain whatever */ }
struct B { A a; }
My question is, is it now
On Friday, 18 April 2014 at 22:11:17 UTC, bearophile wrote:
monarch_dodra:
Out of curiosity, if the requirement was to *also* preserve
ordering (eg: remove all non-first elements), how would you go
at it?
[2, 1, 1, 3, 2, 3] => [2, 1, 3];
Maybe std.algorithm's `makeIndex` would help here?
B
On 4/19/14, Lars T. Kyllingstad via Digitalmars-d-learn
wrote:
> Say I have two structs, defined like this:
>
> struct A { /* could contain whatever */ }
>
> struct B { A a; }
>
> My question is, is it now guaranteed that A.sizeof==B.sizeof?
The best thing to do is add a static assert a
Say I have two structs, defined like this:
struct A { /* could contain whatever */ }
struct B { A a; }
My question is, is it now guaranteed that A.sizeof==B.sizeof,
regardless of how A is defined (member variable types, alignment,
etc.)? More to the point, say I have a function foo()
I use
ldc2 main.d -L-lcurses
or
dmd main.d -L-lcurses
and following source code:
import std.stdio;
extern(C) int tgetnum(const(char) *id);
int main()
{
writeln(tgetnum("li"));
return 0;
}
Note that you don't need to apply toStringz to string literals
since they implicitly cast to con
What are compiler and platform do you use? Probably you are
trying to link with 64-bit library while being on 32-bit OS (or
vice versa)
It works fine on my 32-bit Debian with ldc2 and dmd.
On Saturday, 19 April 2014 at 10:39:43 UTC, Adam D. Ruppe wrote:
Blargh, I don't know teh ldc switch for it :(
Try adding pragma(lib, "curses"); (or ncurses) to your file
with main in it, i think ldc supports that.
pragma(lib, "curses");
extern(C):
int tgetnum(const(char) *capname);
hmm
Blargh, I don't know teh ldc switch for it :(
Try adding pragma(lib, "curses"); (or ncurses) to your file with
main in it, i think ldc supports that.
Am 18.04.2014 22:27, schrieb Steven Schveighoffer via Digitalmars-d-learn:
arr.sort();
arr = arr.uniq.array();
-Steve
Thanks, also for the explanation!
- Tim
On Saturday, 19 April 2014 at 09:59:39 UTC, Adam D. Ruppe wrote:
Try adding -lncurses or -lcurses to the command line. tgetnum
is found in the curses library which isn't linked in
automatically by default.
Error: unrecognized switch '-lcurses'
Error: unrecognized switch '-lncurses'
:((
Try adding -lncurses or -lcurses to the command line. tgetnum is
found in the curses library which isn't linked in automatically
by default.
I want use tgetnum for get terminal size
http://www.mkssoftware.com/docs/man3/curs_termcap.3.asp
extern(C):
int tgetnum(const(char) *capname);
calling a method from main
writeln(tgetnum(toStringz("li")));
I receive an error message
Undefined symbols for architecture x86_64:
"_tgetnum", refer
34 matches
Mail list logo
