Re: Reversing a string
On Friday, 11 January 2019 at 09:41:30 UTC, bauss wrote: On Friday, 11 January 2019 at 08:25:41 UTC, Seb wrote: On Friday, 11 January 2019 at 08:05:39 UTC, AndreasDavour wrote: Hi. I've just started to learn some D, so maybe this question is extremely stupid, but please bear with me. [...] Use .retro - it is also lazy and won't allocate: https://run.dlang.io/is/A6bjrC What a terrible name. Check out the origin :-) https://forum.dlang.org/thread/hl8345$2b1q$1...@digitalmars.com?page=1 -=mike=-
Re: Hello World Example with Glade?
On Friday, 11 September 2015 at 06:45:07 UTC, Mike McKee wrote:
On Friday, 11 September 2015 at 06:00:39 UTC, Mike McKee wrote:
[...]
I think the start of this probably looks like the following,
but I'm not certain:
import gtk;
import gobject.Type;
import std.stdio;
import std.c.process;
int main (string[] args)
{
Main.init(args);
Builder b = new Builder();
b.addFromFile("test1.glade");
Window w = cast(Window)b.getObject("window1");
w.showAll();
Main.run();
return 0;
}
Hi Mike,
There's a Glade example in the demos/builder directory...
Regards, --
...so, this assumed that I had a test1.glade file, and that I
had this line inside it:
So now I need to figure out how to get GtkD installed on Ubuntu
Linux 14.04.
Re: Hello World Example with Glade?
On Friday, 11 September 2015 at 07:13:22 UTC, Mike McKee wrote: On Friday, 11 September 2015 at 06:53:07 UTC, Mike James wrote: There's a Glade example in the demos/builder directory... I'm having trouble installing GtkD on Ubuntu Linux 14.04. I did the apt steps from here: http://d-apt.sourceforge.net/ $ sudo su # wget http://master.dl.sourceforge.net/project/d-apt/files/d-apt.list -O /etc/apt/sources.list.d/d-apt.list # apt-get update && apt-get -y --allow-unauthenticated install --reinstall d-apt-keyring && apt-get update # apt-get install libgtkd3-dev libgtkd3-doc I then run the following and it fails: # dmd test1.d test1.d(1): Error: module gtk is in file 'gtk.d' which cannot be read import path[0] = /usr/include/dmd/phobos import path[1] = /usr/include/dmd/druntime/import It looks last keep you're missing an import path (-Ipath_to_source). Check out http://dlang.org/dmd-linux.html#switches Regards, --
Re: Hello World Example with Glade?
On Friday, 11 September 2015 at 07:29:23 UTC, Mike McKee wrote: On Friday, 11 September 2015 at 07:20:57 UTC, Mike James wrote: It looks last keep you're missing an import path (-Ipath_to_source). Check out http://dlang.org/dmd-linux.html#switches I tried this just now: # dmd test1.d -I/usr/include/dmd/gtkd3/gtkc /usr/include/dmd/gtkd3/gtkc/gtk.d(28): Error: module gtktypes is in file 'gtkc/gtktypes.d' which cannot be read import path[0] = /usr/include/dmd/gtkd3/gtkc import path[1] = /usr/include/dmd/phobos import path[2] = /usr/include/dmd/druntime/import It's saying that it can't read gtkc/gtktypes.d, but there is a file in path /usr/include/dmd/gtkd3/gtkc/gtktypes.d try # dmd test1.d -I/usr/include/dmd/gtkd3 I'm using GtkD on Windows so there is a .../src directory with all the source files in. regards, --
Re: Hello World Example with Glade?
On Friday, 11 September 2015 at 07:47:15 UTC, Mike McKee wrote: [...] The undefined references mean you haven't provided a linker path to the GtkD libs. Have you built the GtkD libraries? Check out https://github.com/gtkd-developers/GtkD
Re: Reading and converting binary file 2 bits at a time
On Saturday, 29 August 2015 at 20:15:53 UTC, Marc Schütz wrote:
Just cast to `Crumbs[]` directly:
import std.bitmanip;
import std.stdio;
import std.file;
struct Crumbs {
mixin(bitfields!(
ubyte, one, 2,
ubyte, two, 2,
ubyte, three, 2,
ubyte, four, 2
));
}
void main(string[] argv)
{
auto raw = read(binaryfile);
auto buffer = cast(Crumbs[]) raw;
foreach (cmb; buffer) {
writefln(Crumb one: %s, cmb.one);
writefln(Crumb two: %s, cmb.two);
writefln(Crumb three: %s, cmb.three);
writefln(Crumb four: %s, cmb.four);
}
}
I like that :-)
Re: Reading and converting binary file 2 bits at a time
On Thursday, 27 August 2015 at 09:00:02 UTC, Andrew Brown wrote:
Hi,
I need to read a binary file, and then process it two bits at a
time. But I'm a little stuck on the first step. So far I have:
import std.file;
import std.stdio;
void main(){
auto f = std.file.read(binaryfile);
auto g = cast(bool[]) f;
writeln(g);
}
but all the values of g then are just true, could you tell me
what I'm doing wrong? I've also looked at the bitmanip module,
I couldn't get it to help, but is that the direction I should
be looking?
Thanks very much
Andrew
How about...
module main;
import std.bitmanip;
import std.stdio;
struct Crumbs {
@property ref ubyte whole() {
return m_whole;
}
union {
private ubyte m_whole;
mixin(bitfields!(
ubyte, one, 2,
ubyte, two, 2,
ubyte, three, 2,
ubyte, four, 2
));
}
}
void main(string[] argv)
{
ubyte[] buffer = [123, 12, 126, 244, 35];
Crumbs cmb;
foreach (octet; buffer) {
cmb.whole = octet;
writefln(Crumb: %08b, octet);
writefln(Crumb one: %s, cmb.one);
writefln(Crumb two: %s, cmb.two);
writefln(Crumb three: %s, cmb.three);
writefln(Crumb four: %s, cmb.four);
}
}
Regards, Mike.
Converting Java code to D
Here is a fragment of Java code from an SWT program...
public enum LineStyle {
NONE(None),
SOLID(Solid),
DASH(Dash),
DOT(Dot),
DASHDOT(Dash Dot),
DASHDOTDOT(Dash Dot Dot);
public final String label;
private LineStyle(String label) {
this.label = label;
}
}
What would be the best ('canonical') way of translating it to D?
Regards,
-=mike=-
Re: Converting Java code to D
On Monday, 20 April 2015 at 17:28:27 UTC, John Colvin wrote:
On Monday, 20 April 2015 at 17:24:30 UTC, bearophile wrote:
John Colvin:
struct LineStyle
{
enum NONE = None;
enum SOLID = Solid;
enum DASH = Dash;
enum DOT = Dot;
enum DASHDOT = Dash Dot;
enum DASHDOTDOT = Dash Dot Dot;
string label;
private this(string label)
{
this.label = label;
}
}
The constructor doesn't look very useful.
Perhaps a named enum is safer.
Bye,
bearophile
True, the constructor doesn't really add anything here.
To be honest, the combination of enumeration and runtime
variables in the Java code seems like a rubbish design, but
perhaps there's a good reason for it that I'm not aware of.
Maybe they extended enum to get over the lack of structs.
Looking at the spec for java enums it appears that you can return
an enumeration or the associated string using the original code.
Regards, -=mike=-
Re: Beginner ?. Why does D suggest to learn java
On Friday, 17 October 2014 at 08:44:00 UTC, Paulo Pinto wrote: On Friday, 17 October 2014 at 01:05:37 UTC, ketmar via Digitalmars-d-learn wrote: On Fri, 17 Oct 2014 00:52:14 + MachineCode via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: I don't understand. If at least it were C but java? why not D itself? C is *awful* as beginner's language. never ever let people start with C if you don't hate 'em. as for D... current version of D can be used, but with some precautions. we now have excellent book by Ali. (it's great, really! i believe that it must be featured on the front dlang.org page!) but java has alot more books and tutorials. not that D is bad for beginners, it's just has a smaller userbase. and all that things with classes are reference types and structs are not, empty array is not empty array but is empty array and so on D may be confusing a little. it's good to have some CS background to understood that things. just my cent and cent. Better, go with FreePascal http://www.freepascal.org/ and discover all that those features that many C advocates spread as being close to the machine and other C only features, aren't exclusive of it. Alongside support for real modules, OO and genericity. Then with a head clean of bad C influences, jump into D. -- Paulo Don't tell him that - he may discover Freepascal/Lazarus is the holy grail of GUI programming and may never try D... ;-) -=mike=-
Re: Initialising multidimensional dynamic arrays
On Tuesday, 30 September 2014 at 17:22:32 UTC, Steven Schveighoffer wrote: On 9/30/14 12:40 PM, Mike James wrote: On Tuesday, 30 September 2014 at 16:07:28 UTC, ketmar via Digitalmars-d-learn wrote: auto a = new int[][](42, 69); ... You'll notice that it's actually a dynamic array of structs containing dynamic arrays - does this change your initializing? That is what his code does. -Steve Hi Steve, It's true that his code initialises an array of arrays - but my array is an array of structs containing a dynamic array. Regards, -=mike=-
Re: Initialising multidimensional dynamic arrays
On Tuesday, 30 September 2014 at 15:57:58 UTC, Mike James wrote:
Hi,
How do I initialise a dynamic array of dynamic arrays?
struct MyData {
SysTime stamp;
short[] data;
this(size_t size) {
data = new short[size];
}
}
MyDataArray mda;
how to initialise mda?
mda = new MyDataArray ?
Thanks.
Regards, -=mike=-
I think I've found a way...
struct MyData {
SysTime stamp;
short[] data;
this(size_t size) {
data = new short[size];
}
}
MyDataArray[] mda; --- sorry, missing the []s in the original
question...
so in the constructor...
this(size_t x, size_t y) {
mda = new MyDataArray[](x);
foreach(n, _; mda) mda[n].data.length = y;
}
Is there a simpler way?
Regards, -=mike=-
Re: Initialising multidimensional dynamic arrays
On Wednesday, 1 October 2014 at 08:08:06 UTC, ketmar via
Digitalmars-d-learn wrote:
On Wed, 01 Oct 2014 07:45:48 +
Mike James via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com
wrote:
so in the constructor...
this(size_t x, size_t y) {
mda = new MyDataArray[](x);
foreach(n, _; mda) mda[n].data.length = y;
}
Is there a simpler way?
sorry, but no. btw, if MyDataArray is struct, you should do
this:
foreach (ref m; mda) m.data.length = y;
or even this:
foreach (ref m; mda = new MyDataArray[](x)) m.data.length = x;
the thing is that without 'ref' you operates on the local copy,
not on
the real array element.
Thanks ketmar, that did the trick.
Regards, -=mike=-
Initialising multidimensional dynamic arrays
Hi,
How do I initialise a dynamic array of dynamic arrays?
struct MyData {
SysTime stamp;
short[] data;
this(size_t size) {
data = new short[size];
}
}
MyDataArray mda;
how to initialise mda?
mda = new MyDataArray ?
Thanks.
Regards, -=mike=-
Re: Initialising multidimensional dynamic arrays
On Tuesday, 30 September 2014 at 16:07:28 UTC, ketmar via Digitalmars-d-learn wrote: On Tue, 30 Sep 2014 15:57:57 + Mike James via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: How do I initialise a dynamic array of dynamic arrays? do you mean something like this: `int[][] a`? if yes, do this: auto a = new int[][](42, 69); and you'll get `int[42][69] a`. heh, people again confused by `new Type[amount]` syntax. that is concrete sign that this syntax will live forever. Thanks ketmar, You'll notice that it's actually a dynamic array of structs containing dynamic arrays - does this change your initializing? Regards, -=mike=-
Re: dgui - Button continually repainting
Hi Andre, I've found a solution to the repainting problem. If you tick the Disable visual themes in the compatibility tab of the program properties (associated with the program icon) the button is only repainted when the mouse cursor enters and exits the button area. Regards, -=mike=- On Wednesday, 10 September 2014 at 19:46:06 UTC, andre wrote: Hi, Just noticed there is an event drawItem whichs is called on WM_DRAWITEM. Class core.controls.ownerdrawcontrol.d is very interesting. This event seems more suitable. Kind regards André On Wednesday, 10 September 2014 at 07:19:53 UTC, Mike James wrote: // Please file this issue also on the dgui bibucket home page. Kind regards Andre // Done. Regards, -=mike=-
Re: dgui - Button continually repainting
// Please file this issue also on the dgui bibucket home page. Kind regards Andre // Done. Regards, -=mike=-
dgui - Button continually repainting
Hi.
I've created a graphic button as per this example on the dgui
website:
import dgui.all;
class MyForm: Form
{
this()
{
text = An Exception was thrown...;
size = Size(130, 100);
// Or use `Bitmap.fromFile`:
auto img = new Bitmap(90, 15, SystemColors.yellow);
auto pen = SystemPens.blackPen;
with(new Button())
{
bounds = Rect(10, 10, 100, 25);
parent = this;
paint.attach((s, e)
{
e.canvas.drawImage(img, 5, 5);
e.canvas.drawLine(pen, 5, 10, 95, 10);
e.canvas.drawLine(pen, 10, 5, 10, 20);
});
}
}
}
int main()
{
return Application.run(new MyForm());
}
and added a writeln(paint) in the paint.attach to show when the
button is repainting. When the form with the button is visible
the button is being continually repainted. Is this a 'feature' of
dgui or is there a flag to set to only re-paint when the button
is invalidated?
Regards, -=mike=-.
DMD Compiler - lexer
Hi, Looking at the DMD Source Guide it says The lexer transforms the file into an array of tokens. Why is this step taken instead of, say, just calling a function that returns the next token (or however many required for the look-ahead)? Regards, -=mike=-
Re: Command Line Application in D
On Monday, 4 August 2014 at 22:03:24 UTC, TJB wrote: On Monday, 4 August 2014 at 21:58:09 UTC, maarten van damme via Digitalmars-d-learn wrote: I am a little bit confused as to what you want. There is a command line example at dlang.org, and there exists a program (rdmd) that compiles several D files and runs them. http://dlang.org/rdmd.html Sorry. I wasn't very clear. Say I want to find all of the files that have a certain extension within a directory and process them somehow at the command line. How could I do that? Have a look at the function dirEntries in std.file. regards, -mike-
