Re: unittest-cov - results?
On Wednesday, July 05, 2017 19:13:21 Jolly James via Digitalmars-d-learn wrote: > On Wednesday, 5 July 2017 at 19:01:06 UTC, Jonathan M Davis wrote: > > On Wednesday, July 05, 2017 18:50:32 Jolly James via > > > > Digitalmars-d-learn wrote: > >> On Wednesday, 5 July 2017 at 18:46:38 UTC, Jolly James wrote: > >> > On Wednesday, 5 July 2017 at 18:09:46 UTC, Seb wrote: > >> >> [...] > >> > > >> > where would I find these *.lst files. Searching for '*.lst' > >> > in the source's root dir doesn't bring any results. > >> > >> I have changed the 'build' to 'test' in the command. Now at > >> least I get the following message: "All unit tests have been > >> run successfully." which should not actually happen, as my > >> code contains an 'assert(false);' unittest. > > > > If you don't run the tests, you won't get any code coverage. > > Building with > > > > dub test --coverage > > The following command does not change anything: >dub test --coverage --arch=x86_64 --compiler=ldc2 > > All I get is "All unit tests have been run successfully." in the > command line. > I don't know why you'd need arch if you're running the tests on the same system that you're building them. And I don't know if ldc has the code coverage stuff that dmd has or not - that depends on which pieces of it are in the front end and which pieces are in the backend. I'd suggest trying it with dmd instead of ldc to see if you get different results. If dub test --coverage does work, whereas running it with the extra flags doesn't, then that at least tells you something about what's going wrong. > > should do it. As for your assert(false) test failing, was it in > > the same module with your main in it? > > No, this test is actually in module 'tools.array'. I don't know then. It was just a thought based on what I've seen before. Clearly, something is making it so that test doesn't run, but I have no idea what. dub does have its own forums though, so you probably stand a better chance of getting useful help there: http://forum.rejectedsoftware.com/groups/rejectedsoftware.dub/ - Jonathan M Davis
Re: GtkD nothing
Unfortunately, importing that module seems to throw an error for some insane reason. Error 42: Symbol Undefined _D3gtk6All12__ModuleInfoZ (gtk.AllGTK.__ModuleInfo) without importing it in to the project(but directly importing all the other modules works fine, e.g., copying and pasting).
Re: GtkD nothing
The module All in GtkD\generated\Gtkd\gtk will allow importing everything, e.g. import gtk = gtk.All; gtk.MainWindow etc. All.d-- module gtk.All; public import gtk.AboutDialog; public import gtk.AccelGroup; public import gtk.AccelLabel; public import gtk.AccelMap; public import gtk.Accessible; public import gtk.Action; public import gtk.ActionableIF; public import gtk.ActionableT; public import gtk.ActionBar; public import gtk.ActionGroup; public import gtk.ActivatableIF; public import gtk.ActivatableT; public import gtk.Adjustment; public import gtk.Alignment; public import gtk.AppChooserButton; public import gtk.AppChooserDialog; public import gtk.AppChooserIF; public import gtk.AppChooserT; public import gtk.AppChooserWidget; public import gtk.Application; public import gtk.ApplicationWindow; public import gtk.Arrow; public import gtk.ArrowAccessible; public import gtk.AspectFrame; public import gtk.Assistant; public import gtk.Bin; public import gtk.BindingEntry; public import gtk.BindingSet; public import gtk.BooleanCellAccessible; public import gtk.Border; public import gtk.Box; public import gtk.BuildableIF; public import gtk.BuildableT; public import gtk.Builder; public import gtk.Button; public import gtk.ButtonAccessible; public import gtk.ButtonBox; public import gtk.Calendar; public import gtk.CellAccessible; public import gtk.CellAccessibleParentIF; public import gtk.CellAccessibleParentT; public import gtk.CellArea; public import gtk.CellAreaBox; public import gtk.CellAreaClass; public import gtk.CellAreaContext; public import gtk.CellEditable; public import gtk.CellEditableIF; public import gtk.CellEditableT; public import gtk.CellLayoutIF; public import gtk.CellLayoutT; public import gtk.CellRenderer; public import gtk.CellRendererAccel; public import gtk.CellRendererClass; public import gtk.CellRendererCombo; public import gtk.CellRendererPixbuf; public import gtk.CellRendererProgress; public import gtk.CellRendererSpin; public import gtk.CellRendererSpinner; public import gtk.CellRendererText; public import gtk.CellRendererToggle; public import gtk.CellView; public import gtk.CheckButton; public import gtk.CheckMenuItem; public import gtk.CheckMenuItemAccessible; public import gtk.Clipboard; public import gtk.ColorButton; public import gtk.ColorChooserDialog; public import gtk.ColorChooserIF; public import gtk.ColorChooserT; public import gtk.ColorChooserWidget; public import gtk.ColorSelection; public import gtk.ColorSelectionDialog; public import gtk.ComboBox; public import gtk.ComboBoxAccessible; public import gtk.ComboBoxText; public import gtk.Container; public import gtk.ContainerAccessible; public import gtk.ContainerCellAccessible; public import gtk.ContainerClass; public import gtk.CssProvider; public import gtk.CssSection; public import gtk.Dialog; public import gtk.DragAndDrop; public import gtk.DrawingArea; public import gtk.EditableIF; public import gtk.EditableT; public import gtk.Entry; public import gtk.EntryAccessible; public import gtk.EntryBuffer; public import gtk.EntryCompletion; public import gtk.EventBox; public import gtk.EventController; public import gtk.Expander; public import gtk.ExpanderAccessible; public import gtk.FileChooserButton; public import gtk.FileChooserDialog; public import gtk.FileChooserIF; public import gtk.FileChooserNative; public import gtk.FileChooserT; public import gtk.FileChooserWidget; public import gtk.FileFilter; public import gtk.Fixed; public import gtk.FlowBox; public import gtk.FlowBoxAccessible; public import gtk.FlowBoxChild; public import gtk.FlowBoxChildAccessible; public import gtk.FontButton; public import gtk.FontChooserDialog; public import gtk.FontChooserIF; public import gtk.FontChooserT; public import gtk.FontChooserWidget; public import gtk.FontSelection; public import gtk.FontSelectionDialog; public import gtk.Frame; public import gtk.FrameAccessible; public import gtk.Gesture; public import gtk.GestureDrag; public import gtk.GestureLongPress; public import gtk.GestureMultiPress; public import gtk.GesturePan; public import gtk.GestureRotate; public import gtk.GestureSingle; public import gtk.GestureSwipe; public import gtk.GestureZoom; public import gtk.GLArea; public import gtk.Gradient; public import gtk.Grid; public import gtk.HandleBox; public import gtk.HBox; public import gtk.HButtonBox; public import gtk.HeaderBar; public import gtk.HPaned; public import gtk.HScale; public import gtk.HScrollbar; public import gtk.HSeparator; public import gtk.HSV; public import gtk.IconFactory; public import gtk.IconInfo; public import gtk.IconSet; public import gtk.IconSize; public import gtk.IconSource; public import gtk.IconTheme; public import gtk.IconView; public import gtk.IconViewAccessible; public import gtk.Image; public import gtk.ImageAccessible; public import gtk.ImageCellAccessible; public import gtk.ImageMenuItem; public import gtk.IMContext; public import gtk.IMContextSimple; public import
Re: GtkD nothing
On Thursday, 6 July 2017 at 01:06:38 UTC, FoxyBrown wrote: On Thursday, 6 July 2017 at 01:03:11 UTC, FoxyBrown wrote: On Thursday, 6 July 2017 at 00:51:40 UTC, FoxyBrown wrote: [...] Running it from the command line showed it wasn't finding the gtk dll. The path variable is set up correctly. I copied the bin dir to the exe and it ran and worked except for missing icons. Why is gtkD not finding gtk+ even though it is clearly in the path and correct? Copying over the share dir gets it to work but surely all this is avoidable? So, while the setup isn't smooth and not finding everything, do I really have to import every ui element or can I just import the entire gtk?
Re: GtkD nothing
On Thursday, 6 July 2017 at 01:03:11 UTC, FoxyBrown wrote: On Thursday, 6 July 2017 at 00:51:40 UTC, FoxyBrown wrote: [...] Running it from the command line showed it wasn't finding the gtk dll. The path variable is set up correctly. I copied the bin dir to the exe and it ran and worked except for missing icons. Why is gtkD not finding gtk+ even though it is clearly in the path and correct? Copying over the share dir gets it to work but surely all this is avoidable?
Re: GtkD nothing
On Thursday, 6 July 2017 at 00:51:40 UTC, FoxyBrown wrote:
import gtk.MainWindow;
import gtk.Label;
import gtk.Main;
import std.stdio;
pragma(lib, "C:\\DLang\\GtkD\\x86\\gtkd.lib");
void main(string[] args)
{
Main.init(args);
MainWindow win = new MainWindow("Hello World");
win.setDefaultSize(200, 100);
win.add(new Label("Hello World"));
win.showAll();
Main.run();
getchar();
}
Did all the steps, had to switch over from the 64-bit to the
32-bit dll of gtk+ to avoid errors(since i couldn't get gtkD to
compile for 64-bit).
The above code(copied from site) simply runs and exists, I
added the getchar but it doesn't seem to be executed. a BP on
the first line is never reached, no errors, nothing, to help
diagnose the issues.
Any ideas?
Running it from the command line showed it wasn't finding the gtk
dll. The path variable is set up correctly. I copied the bin dir
to the exe and it ran and worked except for missing icons. Why is
gtkD not finding gtk+ even though it is clearly in the path and
correct?
GtkD nothing
import gtk.MainWindow;
import gtk.Label;
import gtk.Main;
import std.stdio;
pragma(lib, "C:\\DLang\\GtkD\\x86\\gtkd.lib");
void main(string[] args)
{
Main.init(args);
MainWindow win = new MainWindow("Hello World");
win.setDefaultSize(200, 100);
win.add(new Label("Hello World"));
win.showAll();
Main.run();
getchar();
}
Did all the steps, had to switch over from the 64-bit to the
32-bit dll of gtk+ to avoid errors(since i couldn't get gtkD to
compile for 64-bit).
The above code(copied from site) simply runs and exists, I added
the getchar but it doesn't seem to be executed. a BP on the first
line is never reached, no errors, nothing, to help diagnose the
issues.
Any ideas?
rdmd issues
rdmd -m64 Build.d Error: can't run 'C:\Program Files\VS\VC\Tools\MSVC\14.10.25017\bin\HostX64\x64', check PATH The path exists, but since it doesn't tell me what it is trying to run, I have no clue. The path contains link.exe.
Re: [BEGINNER] reccurence! and sequence!
On 07/05/2017 04:38 PM, helxi wrote:
>>
>> sequence!((a, n) => a[0] + 1)(1).take(10).writeln;
>> // [2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
>> // because a[0] is always 1
>>
>> recurrence!((a, n) => a[0] + 1)(1).take(10).writeln;
>> // [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>> // because a[0] refers to the previous value
>>
>
> Oh thank you. Just 2 follow-up questions:
>> recurrence!((a, n) => a[0] + 1)(1).take(10).writeln;
> 1. In the last example of reccurence, what does n in (a,n) refer to?
n is "the index of the current value". Each time the lambda is called,
a[n] is what is being generated
a[n-1] is the previous value
a[0] is the same as a[n-1]? (I find this confusing)
> 2. How would you chain until! with reccurence? For example I want to
> compute 1, 10, 100, ..., (until the value remains smaller than 1000_000)?
import std.stdio;
import std.algorithm;
import std.range;
void main() {
auto r = recurrence!((a, n) => a[n-1] * 10)(1);
auto u = r.until!(a => a >= 1_000_000);
writeln(u);
}
[1, 10, 100, 1000, 1, 10]
Ali
Re: dub + local dependencies
On Thursday, 6 July 2017 at 00:09:46 UTC, Mike Parker wrote:
You have a few options:
* Use a path dependency:
"dependencies": {
"xyz": { "path": "path/to/xyz" }
}
* Use add-local with a version on the command line:
dub add-local path/to/xyz 0.0.1
* Use add-local or add-paths and specify a version as described
by `dub add-paths -h`
Sorry -- extraneous `s` on the `path` bit.
And for the record:
https://code.dlang.org/docs/commandline#add-local
https://code.dlang.org/docs/commandline#add-path
https://code.dlang.org/package-format?lang=json#version-specs
Re: dub + local dependencies
On Wednesday, 5 July 2017 at 15:34:36 UTC, Jolly James wrote:
WARNING: A deprecated branch based version specification is
used for the dependency xyz.
Please use numbered versions instead.
Also note that you can still use the dub.selections.json file
to override a certain dependency to use a branch instead.
The problem is: xyz is a local package and therefor I don't
know how to specify its version. So in the dub.json of the
package abc requiring xyz is written:
"dependencies": {
"xyz": "~master"
},
Is there a cleaner solution?
You have a few options:
* Use a path dependency:
"dependencies": {
"xyz": { "path": "path/to/xyz" }
}
* Use add-local with a version on the command line:
dub add-local path/to/xyz 0.0.1
* Use add-local or add-paths and specify a version as described
by `dub add-paths -h`
Re: [BEGINNER] reccurence! and sequence!
On Monday, 26 June 2017 at 10:34:22 UTC, ag0aep6g wrote: On 06/26/2017 11:51 AM, helxi wrote: [...] `a` is a tuple of the run-time arguments you pass to `sequence`. In this example, no arguments are passed (empty parens at the end of the call), so `a` is empty. [...] a[0] = 1 a[1] = 2 [...] `a` isn't used in the string lambda, and it's not considered an element of the range. So n starts at 0 and this just prints 0+2, 1+2, 2+2, etc. [...] `a` is still not used in the string lambda, but `recurrence` uses the values in `a` as the first elements of the range. `n` is incremented accordingly (to 1), so this prints: 1 = a[0], 3 = (n = 1) + 2, 4 = (n = 2) + 2, etc. Another difference between `sequence` and `recurrence` is that `a` always refers to the same initial value(s) in `sequence`, while in `recurrence` it gets updated and refers to the previous element(s) of the range: sequence!((a, n) => a[0] + 1)(1).take(10).writeln; // [2, 2, 2, 2, 2, 2, 2, 2, 2, 2] // because a[0] is always 1 recurrence!((a, n) => a[0] + 1)(1).take(10).writeln; // [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] // because a[0] refers to the previous value Oh thank you. Just 2 follow-up questions: recurrence!((a, n) => a[0] + 1)(1).take(10).writeln; 1. In the last example of reccurence, what does n in (a,n) refer to? 2. How would you chain until! with reccurence? For example I want to compute 1, 10, 100, ..., (until the value remains smaller than 1000_000)?
Re: Question on @nothrow
On 06/02/2017 12:35 AM, Vasileios Anagnostopoulos wrote:
> On Friday, 2 June 2017 at 07:33:05 UTC, Vasileios Anagnostopoulos wrote:
>> But still I believe that @nothrow should be mandatory if there is no
>> possibility for a function to throw something. I understand that in
>> the DLL/LIB level this is not possible. However, at least in the .di
>> level it should be there.
>>
>> And if you want my two cents, after reading a lot I came to the
>> "personal" conclusion that Exception objects are wrong. For me it is
>> enough to have something like
> Or simply
>
> void A() {
> raise;
> }
>
> void B() nothrow {
> }
>
>
> void D () nothrow { //the compiler inferred from body that D cannever
throw
>
> try {
> A();
> } else {
> B();
> }
>
> }
If I understand you correctly, you want the compiler to force the
programmer to be explicit about @nothrow. That's an interesting idea...
I don't have strong opinions on the matter.
To add to this discussion, there is the "Checked vs unchecked
exceptions" thread currently active on the general newsgroup:
http://forum.dlang.org/post/hxhjcchsulqejwxyw...@forum.dlang.org
Ali
Re: Question on @nothrow
On Wednesday, 31 May 2017 at 09:31:48 UTC, Jonathan M Davis wrote: On Wednesday, May 31, 2017 08:18:07 Vasileios Anagnostopoulos via Digitalmars-d-learn wrote: [...] Well, if you're not doing checked exceptions, the interesting question is really what _doesn't_ throw rather than what throws, because if the compiler knows that a function doesn't throw, it can optimize out the exception handling mechanisms that are normally required. I don't think this is possible in current D? @nothrow functions can still throw Error.
Re: Question on @nothrow
On Wednesday, 31 May 2017 at 08:18:07 UTC, Vasileios Anagnostopoulos wrote: Hi, after reading various articles bout the "supposed" drawbacks of checked exceptions I started to have questions on @nothrow. Why there exists and not a @throws annotation enforced by the compiler? I understand that people are divided on checked exceptions and each side has some valid points. But explicitly marking a function as throwing "something" is another subject. Why have the dlang community reached to the decision to use @nothrow and not a @throws? Adding @throws to a function requires changing all the functions downstream. Adding @nothrow doesn't.
Re: unittest-cov - results?
On Wednesday, 5 July 2017 at 19:01:06 UTC, Jonathan M Davis wrote: On Wednesday, July 05, 2017 18:50:32 Jolly James via Digitalmars-d-learn wrote: On Wednesday, 5 July 2017 at 18:46:38 UTC, Jolly James wrote: > On Wednesday, 5 July 2017 at 18:09:46 UTC, Seb wrote: >> [...] > > where would I find these *.lst files. Searching for '*.lst' > in the source's root dir doesn't bring any results. I have changed the 'build' to 'test' in the command. Now at least I get the following message: "All unit tests have been run successfully." which should not actually happen, as my code contains an 'assert(false);' unittest. If you don't run the tests, you won't get any code coverage. Building with dub test --coverage The following command does not change anything: dub test --coverage --arch=x86_64 --compiler=ldc2 All I get is "All unit tests have been run successfully." in the command line. should do it. As for your assert(false) test failing, was it in the same module with your main in it? No, this test is actually in module 'tools.array'.
Re: unittest-cov - results?
On Wednesday, July 05, 2017 18:50:32 Jolly James via Digitalmars-d-learn wrote: > On Wednesday, 5 July 2017 at 18:46:38 UTC, Jolly James wrote: > > On Wednesday, 5 July 2017 at 18:09:46 UTC, Seb wrote: > >> On Wednesday, 5 July 2017 at 17:46:01 UTC, Jolly James wrote: > >>> [...] > >> > >> For every file a `.lst` file is generated (it's the same > >> how `-cov` behaves at DMD). > >> These .lst files contain the original source code with number > >> > >> of hits of a respective line: > >> 2|auto copy = new char[s.length + 1]; > >> 2|copy[0 .. s.length] = s[]; > >> 2|copy[s.length] = 0; > >> > >> Maybe you haven't seen the lst files? > >> > >> > >> Btw if you use Travis, you can use an `after_success` event to > >> your `.travis.yml` to upload the results to CodeCov for a nice > >> visuals & PR integration: > >> > >> ``` > >> > >> after_success: > >> - bash <(curl -s https://codecov.io/bash) > >> > >> ``` > >> > >> We do this on most dlang repos, e.g. > >> https://github.com/dlang/phobos/pull/5503 > > > > where would I find these *.lst files. Searching for '*.lst' in > > the source's root dir doesn't bring any results. > > I have changed the 'build' to 'test' in the command. Now at least > I get the following message: "All unit tests have been run > successfully." which should not actually happen, as my code > contains an 'assert(false);' unittest. If you don't run the tests, you won't get any code coverage. Building with dub test --coverage should do it. As for your assert(false) test failing, was it in the same module with your main in it? I ran into a bug in dub not all that long ago where the tests in the module with main in it weren't actually being run even though the other tests were. (which reminds me, I should verify that again and report it). - Jonathan M Davis
Re: unittest-cov - results?
On Wednesday, 5 July 2017 at 18:46:38 UTC, Jolly James wrote: On Wednesday, 5 July 2017 at 18:09:46 UTC, Seb wrote: On Wednesday, 5 July 2017 at 17:46:01 UTC, Jolly James wrote: [...] For every file a `.lst` file is generated (it's the same how `-cov` behaves at DMD). These .lst files contain the original source code with number of hits of a respective line: 2|auto copy = new char[s.length + 1]; 2|copy[0 .. s.length] = s[]; 2|copy[s.length] = 0; Maybe you haven't seen the lst files? Btw if you use Travis, you can use an `after_success` event to your `.travis.yml` to upload the results to CodeCov for a nice visuals & PR integration: ``` after_success: - bash <(curl -s https://codecov.io/bash) ``` We do this on most dlang repos, e.g. https://github.com/dlang/phobos/pull/5503 where would I find these *.lst files. Searching for '*.lst' in the source's root dir doesn't bring any results. I have changed the 'build' to 'test' in the command. Now at least I get the following message: "All unit tests have been run successfully." which should not actually happen, as my code contains an 'assert(false);' unittest.
Re: unittest-cov - results?
On Wednesday, 5 July 2017 at 18:09:46 UTC, Seb wrote: On Wednesday, 5 July 2017 at 17:46:01 UTC, Jolly James wrote: [...] For every file a `.lst` file is generated (it's the same how `-cov` behaves at DMD). These .lst files contain the original source code with number of hits of a respective line: 2|auto copy = new char[s.length + 1]; 2|copy[0 .. s.length] = s[]; 2|copy[s.length] = 0; Maybe you haven't seen the lst files? Btw if you use Travis, you can use an `after_success` event to your `.travis.yml` to upload the results to CodeCov for a nice visuals & PR integration: ``` after_success: - bash <(curl -s https://codecov.io/bash) ``` We do this on most dlang repos, e.g. https://github.com/dlang/phobos/pull/5503 where would I find these *.lst files. Searching for '*.lst' in the source's root dir doesn't bring any results.
Re: unittest-cov - results?
On Wednesday, 5 July 2017 at 17:46:01 UTC, Jolly James wrote: How does unit testing with dub work? dub build --arch=x86_64 --build=unittest-cov --force --compiler=ldc2 After execution, there is no result output in the command line. For every file a `.lst` file is generated (it's the same how `-cov` behaves at DMD). These .lst files contain the original source code with number of hits of a respective line: 2|auto copy = new char[s.length + 1]; 2|copy[0 .. s.length] = s[]; 2|copy[s.length] = 0; Maybe you haven't seen the lst files? Btw if you use Travis, you can use an `after_success` event to your `.travis.yml` to upload the results to CodeCov for a nice visuals & PR integration: ``` after_success: - bash <(curl -s https://codecov.io/bash) ``` We do this on most dlang repos, e.g. https://github.com/dlang/phobos/pull/5503
Re: Remove instance from array
On Wed, Jul 05, 2017 at 05:07:14PM +, Jolly James via Digitalmars-d-learn wrote: > On Wednesday, 5 July 2017 at 16:55:43 UTC, bachmeier wrote: > > On Wednesday, 5 July 2017 at 16:04:16 UTC, Jolly James wrote: > > > > > Here in D everything looks like climbing mount everest. When you > > > ask how to use D's containers you are recommended to use dynamic > > > arrays instead. When you look at the docs for std.algorithm, e.g. > > > the .remove section, you get bombed with things like > > > 'SwapStrategy.unstable', asserts and tuples, but you aren't told > > > how to simply remove 1 specific element. > > > > If you feel that there is a problem with the docs, you should file a > > bug: https://dlang.org/bugstats.php > > > > The documentation is still not perfect, but the only way to improve > > it is to file bugs when you see something that needs fixing. > > unfortunately, it's not that the docs would be wrong or something that > can be easily corrected. Nope, the docs do everything right, they show > you what the existing things do. But what they don't do is how to get > stuff done. imho some additional, useful guides would be nice. No, that's a sign that the docs are not good enough. Describing what existing things do is only the bare minimum of documentation. *Good* documentation should also tell you what you can use it for, and give examples of how to do it, preferably examples that address the most common use cases first, and then, if necessary, a discussion of more details later. The very first example in the docs for std.algorithm.mutation.remove is not suitable as a first example, because it already throws something unexpected in your face, i.e., that remove() doesn't change the incoming range directly. It should have shown the *correct* way of removing an element as a first example, i.e.: a = a.remove(1); And *then* talk about the details later. Here's my fix for this: https://github.com/dlang/phobos/pull/5548 In the future, please do file a bug for these kinds of documentation issues. D needs *good* documentation, not just bare-minimum documentation. T -- Long, long ago, the ancient Chinese invented a device that lets them see through walls. It was called the "window".
unittest-cov - results?
How does unit testing with dub work? dub build --arch=x86_64 --build=unittest-cov --force --compiler=ldc2 After execution, there is no result output in the command line.
Re: Remove instance from array
On Wednesday, 5 July 2017 at 16:55:43 UTC, bachmeier wrote: On Wednesday, 5 July 2017 at 16:04:16 UTC, Jolly James wrote: Here in D everything looks like climbing mount everest. When you ask how to use D's containers you are recommended to use dynamic arrays instead. When you look at the docs for std.algorithm, e.g. the .remove section, you get bombed with things like 'SwapStrategy.unstable', asserts and tuples, but you aren't told how to simply remove 1 specific element. If you feel that there is a problem with the docs, you should file a bug: https://dlang.org/bugstats.php The documentation is still not perfect, but the only way to improve it is to file bugs when you see something that needs fixing. unfortunately, it's not that the docs would be wrong or something that can be easily corrected. Nope, the docs do everything right, they show you what the existing things do. But what they don't do is how to get stuff done. imho some additional, useful guides would be nice.
Re: Remove instance from array
On Wednesday, 5 July 2017 at 16:04:16 UTC, Jolly James wrote: Here in D everything looks like climbing mount everest. When you ask how to use D's containers you are recommended to use dynamic arrays instead. When you look at the docs for std.algorithm, e.g. the .remove section, you get bombed with things like 'SwapStrategy.unstable', asserts and tuples, but you aren't told how to simply remove 1 specific element. If you feel that there is a problem with the docs, you should file a bug: https://dlang.org/bugstats.php The documentation is still not perfect, but the only way to improve it is to file bugs when you see something that needs fixing.
Re: Remove instance from array
On Wednesday, 5 July 2017 at 16:04:16 UTC, Jolly James wrote:
On Wednesday, 5 July 2017 at 15:56:45 UTC, Igor Shirkalin wrote:
[...]
Thank you! :)
But why a containers so complicated in D?
[...]
Part of CoreCLR's 'List':
public bool Remove(T item)
{
int index = IndexOf(item);
if (index >= 0)
{
RemoveAt(index);
return true;
}
return false;
}
//
https://github.com/dotnet/coreclr/blob/master/src/mscorlib/src/System/Collections/Generic/List.cs
If there isn't already, maybe something similar to this should
get part of Phobos. I think this could be really useful.
Re: Remove instance from array
On Wednesday, 5 July 2017 at 16:04:16 UTC, Jolly James wrote: On Wednesday, 5 July 2017 at 15:56:45 UTC, Igor Shirkalin wrote: On Wednesday, 5 July 2017 at 15:48:14 UTC, Jolly James wrote: On Wednesday, 5 July 2017 at 15:44:47 UTC, Igor Shirkalin wrote: On Wednesday, 5 July 2017 at 15:30:08 UTC, Jolly James wrote: WhatEver[] q = []; [...] auto i = new WhatEver(); q[] = i; How does one remove that instance 'i'? What exactly do you want to remove? After a[]=i your array contain a lot of references to 'i'. I would like to know how works: removing - the first - and all references to 'i' inside the 'q'. Perhaps, for all references to i it should look like: a = a.filter!(a => a !is i).array; Thank you! :) But why a containers so complicated in D? In C# I would go for a generic List, which would support structs and classes, where I simply could call '.Remove(T item)' or '.RemoveAt(int index)'. I would know how this works, because the method names make sense, the docs are straight forward. Here in D everything looks like climbing mount everest. When you ask how to use D's containers you are recommended to use dynamic arrays instead. When you look at the docs for std.algorithm, e.g. the .remove section, you get bombed with things like 'SwapStrategy.unstable', asserts and tuples, but you aren't told how to simply remove 1 specific element. I don't know c sharp, but I can tell everything about c++ and python. To climb a everest in python you have to know almost nothing, in c++ you have to know almost everything. In D you have to be smarter, you do not need to climb a everest but you have to know minimum to do that. Spend a year in learning and get the best result in minutes).
mysql-native ResultRange + map
Hi all!
After some hard time with debugging, I found ResultRange returned
by query() and Prepared::query() of mysql-native package can't be
combined with map() because after map() it becomes empty
resultset.
Code (conn.queryRows just a wrapper for query(Connections, sql) ):
immutable sql = "SELECT id FROM "~tableName~" ORDER BY id";
conn.queryRows(sql).each!(row => writeln("each:",
row[0].to!string));
string[] applied = conn.queryRows(sql).map!(row =>
row[0].to!string).array;
writeln("applied:", applied);
foreach(row; conn.queryRows(sql))
writeln("foreach: ", row[0].to!string);
conn.queryRows(sql).map!(row => row[0].to!string).each!(row =>
writeln("map-each:", row));
foreach(row; conn.queryRows(sql).map!(row => row[0].to!string))
writeln("foreach-map: ", row);
stdout.flush;
Result:
SELECT id FROM versionupdate ORDER BY id
each:.Script20161013_create_database
each:.Script20161221_sites_table
each:.Script20161227_update_users_devices
each:.Script20170121_ownerid
each:.Script20170124_create_clients
each:.Script20170213_no_unique_site_name
each:.Script20170215_remove_site_sn
each:.Script20170228_remove_site_index
each:.Script20170301_add_linkNo
each:.Script20170301_fix_sites_indexes
each:.Script20170310_demo_client
each:.Script20170513_max_dev_number
SELECT id FROM versionupdate ORDER BY id
applied:[]
SELECT id FROM versionupdate ORDER BY id
foreach: .Script20161013_create_database
foreach: .Script20161221_sites_table
foreach: .Script20161227_update_users_devices
foreach: .Script20170121_ownerid
foreach: .Script20170124_create_clients
foreach: .Script20170213_no_unique_site_name
foreach: .Script20170215_remove_site_sn
foreach: .Script20170228_remove_site_index
foreach: .Script20170301_add_linkNo
foreach: .Script20170301_fix_sites_indexes
foreach: .Script20170310_demo_client
foreach: .Script20170513_max_dev_number
SELECT id FROM versionupdate ORDER BY id
SELECT id FROM versionupdate ORDER BY id
As you see simple each() and foreach() works, but all examples
with map() involved always empty. Can anybody explain such
strange behavior?
Re: Remove instance from array
On Wednesday, 5 July 2017 at 15:56:45 UTC, Igor Shirkalin wrote: On Wednesday, 5 July 2017 at 15:48:14 UTC, Jolly James wrote: On Wednesday, 5 July 2017 at 15:44:47 UTC, Igor Shirkalin wrote: On Wednesday, 5 July 2017 at 15:30:08 UTC, Jolly James wrote: WhatEver[] q = []; [...] auto i = new WhatEver(); q[] = i; How does one remove that instance 'i'? What exactly do you want to remove? After a[]=i your array contain a lot of references to 'i'. I would like to know how works: removing - the first - and all references to 'i' inside the 'q'. Perhaps, for all references to i it should look like: a = a.filter!(a => a !is i).array; Thank you! :) But why a containers so complicated in D? In C# I would go for a generic List, which would support structs and classes, where I simply could call '.Remove(T item)' or '.RemoveAt(int index)'. I would know how this works, because the method names make sense, the docs are straight forward. Here in D everything looks like climbing mount everest. When you ask how to use D's containers you are recommended to use dynamic arrays instead. When you look at the docs for std.algorithm, e.g. the .remove section, you get bombed with things like 'SwapStrategy.unstable', asserts and tuples, but you aren't told how to simply remove 1 specific element.
Re: Remove instance from array
On Wednesday, 5 July 2017 at 15:48:14 UTC, Jolly James wrote: On Wednesday, 5 July 2017 at 15:44:47 UTC, Igor Shirkalin wrote: On Wednesday, 5 July 2017 at 15:30:08 UTC, Jolly James wrote: WhatEver[] q = []; [...] auto i = new WhatEver(); q[] = i; How does one remove that instance 'i'? What exactly do you want to remove? After a[]=i your array contain a lot of references to 'i'. I would like to know how works: removing - the first - and all references to 'i' inside the 'q'. Perhaps, for all references to i it should look like: a = a.filter!(a => a !is i).array;
Re: Remove instance from array
On Wednesday, 5 July 2017 at 15:44:47 UTC, Igor Shirkalin wrote: On Wednesday, 5 July 2017 at 15:30:08 UTC, Jolly James wrote: WhatEver[] q = []; [...] auto i = new WhatEver(); q[] = i; How does one remove that instance 'i'? What exactly do you want to remove? After a[]=i your array contain a lot of references to 'i'. I would like to know how works: removing - the first - and all references to 'i' inside the 'q'.
Re: Remove instance from array
On Wednesday, 5 July 2017 at 15:30:08 UTC, Jolly James wrote: WhatEver[] q = []; [...] auto i = new WhatEver(); q[] = i; How does one remove that instance 'i'? What exactly do you want to remove? After a[]=i your array contain a lot of references to 'i'.
Re: Remove instance from array
On Wednesday, 5 July 2017 at 15:30:08 UTC, Jolly James wrote: WhatEver[] q = []; [...] auto i = new WhatEver(); q[] = i; How does one remove that instance 'i'? Maybe: http://dlang.org/phobos/std_algorithm_mutation.html#.remove ?
dub + local dependencies
WARNING: A deprecated branch based version specification is
used for the dependency xyz.
Please use numbered versions instead.
Also note that you can still use the dub.selections.json file
to override a certain dependency to use a branch instead.
The problem is: xyz is a local package and therefor I don't know
how to specify its version. So in the dub.json of the package abc
requiring xyz is written:
"dependencies": {
"xyz": "~master"
},
Is there a cleaner solution?
Re: how to harvest the results of tasks from a taskpool?
On Wednesday, 5 July 2017 at 13:55:22 UTC, Martin wrote:
Hi,
i have a coulpe of different machines with MySQL Servers
running on it.
Now, i want to execute queries for all Databases at the same
time and collect the Result to process it.
I am new to the parallelism - so maybe i understand something
totaly wrong.
What i tring is something like this:
{
auto tPool = new TaskPool();
forach(server ; servers)
{
auto task = task!queryWorker(query);
tPool.put(task);
}
tPool.finish(true);
//> how to collect the results now? <---
}
row[] queryWorker(string query) {
//rows = result of the query
return rows;
}
btw.. how to markup code in this forum?
I tested a much simpler approach with the following
setup/structure?:
// a shared array of results where each result is again an array;
Rows results[];
// using parallel foreach
foreach(i,server;servers.parallel){
result[i] = request(server).array;;
}
Now every array of rows is accessible in result[]?
Tested this construct with parallel curl requests:
time ./parallel_curl
Site www.dlang.org. Page has length:31607
Site forum.dlang.org. Page has length:24358
Site code.dlang.org. Page has length:36477
Site www.google.com. Page has length:10628
real0m0.836s
user0m0.137s
sys 0m0.034s
Without parallel:
real0m2.424s
user0m0.722s
sys 0m0.209s
This is the code:
import std.stdio;
import std.net.curl;
import std.parallelism;
void main()
{
enum string[] tospider =
["www.dlang.org","forum.dlang.org","code.dlang.org","www.google.com"];
char[][tospider.length] results;
foreach(i,site;tospider.parallel){
results[i] = get(site);
}
foreach(i,e;results){
writeln("Site ", tospider[i],". Page has
length:",e.length);
}
}
Will try to use this approach to collect some elastic seach
results and look if it speeds up on an 8 core machine.
Remove instance from array
WhatEver[] q = []; [...] auto i = new WhatEver(); q[] = i; How does one remove that instance 'i'?
how to harvest the results of tasks from a taskpool?
Hi,
i have a coulpe of different machines with MySQL Servers running
on it.
Now, i want to execute queries for all Databases at the same time
and collect the Result to process it.
I am new to the parallelism - so maybe i understand something
totaly wrong.
What i tring is something like this:
{
auto tPool = new TaskPool();
forach(server ; servers)
{
auto task = task!queryWorker(query);
tPool.put(task);
}
tPool.finish(true);
//> how to collect the results now? <---
}
row[] queryWorker(string query) {
//rows = result of the query
return rows;
}
btw.. how to markup code in this forum?
Re: Need simple sound
On Wednesday, 5 July 2017 at 10:19:54 UTC, Sebastiaan Koppe wrote:
On Wednesday, 5 July 2017 at 09:43:05 UTC, Martin Tschierschke
wrote:
On Wednesday, 5 July 2017 at 07:21:45 UTC, Sebastiaan Koppe
wrote:
On Wednesday, 5 July 2017 at 05:34:37 UTC, FoxyBrown wrote:
On Tuesday, 4 July 2017 at 20:37:44 UTC, Sebastiaan Koppe
wrote:
Portaudio is simple as well. And nice cross platform.
are there any bindings?
Sure, see http://code.dlang.org/packages/portaudio
Sorry, for that question but now, as I have several different
options -
all not 'overdocumented' - so what would be the shortest
possible D program waiting for input and playing a sound from
a file in parallel?
Something short like the single-file dub example...?
#!/usr/bin/env dub
/+ dub.sdl:
name "hello"
+/
void main() {
writef("Do you like the music?");
char[] answer;
answer = readln();
writef("This was your Answer: ", answer);
}
This one plays a wav file. Couldn't get dub to do single-file
on it. It kept giving linker errors. (Took example from
https://github.com/v--/portaudio/blob/master/examples/pa_test.d)
[...]
Lerror:
stderr.writefln("error %s",
to!string(Pa_GetErrorText(err)));
return 1;
}
Thank you!
Without the error handling it would be quite simple :-)
So, the following process starts the music in main, it is just to
clarify the process for me: In main:
//1
PaStream* stream;
Sound input = decodeWAV("FILE.wav");
auto audio = Audio(input);
Pa_Initialize();
Pa_OpenDefaultStream(,...input...,);
//2
Pa_StartStream(stream);
//3
Pa_StopStream(stream);
Pa_CloseStream(stream);
For my purpose I will try to encapsulate it all in 3 additional
own methods on top of it:
//1
auto myinput = InitWav("File.wav");
//2
PlaySound(myinput,volume=default, length=max_length);
//3
StopSound(myinput);
With a new Struct myinput to handle input,audio and stream.
Thank you all for your help!
Re: weird error message
On Sunday, 2 July 2017 at 01:06:29 UTC, Ali Çehreli wrote: On 07/01/2017 04:56 PM, crimaniak wrote: > about very long error messages generated in some > cases. Please submit a bug report. The compiler may be able to abbreviate certain types. For example, in this case most of the error message text is values of a static array elements. Done: https://issues.dlang.org/show_bug.cgi?id=17599
Re: Append to 'map' result
On Wednesday, 5 July 2017 at 01:43:46 UTC, Ali Çehreli wrote:
On 07/04/2017 05:52 PM, Jean-Louis Leroy wrote:
On Wednesday, 5 July 2017 at 00:28:01 UTC, Ali Çehreli wrote:
On 07/04/2017 04:57 PM, Jean-Louis Leroy wrote:
[...]
No time to dig deeper but this is because the two ranges that
chain()
receives do not have a common type. (Rather, that type is
'void'):
[...]
This is related to TypeInfo.init, which unfortunately is *not*
the .init property in this case. :( Luckily, it will be fixed
in 2.075. This is what object.d has:
[...]
So, unfortunately, most Phobos range functions cannot be used
with TypeInfo as they would invariably touch ElementType. Here
is a halfway workaround that uses each() instead of map(): :/
Aaah, so I was not doing anything wrong ;-)
I was trying to factor this code:
foreach (i; k.interfaces) {
if (i.classinfo in classMap) {
v.bases ~= classMap[i.classinfo];
}
}
if (k.base in classMap) {
v.bases ~= classMap[k.base];
}
i.e. process the class base along with the interfaces in the same
loop. I dwelled on it because my goal with this project is to
learn (and evaluate) D.
Anyway, I am building my own graph of enriched ClassInfo objects;
once that is done, I won't be impacted with the bug anymore.
Thanks for the diagnostic...
J-L
Re: Cannot implicitly convert expression (struct this)
On Friday, 23 June 2017 at 15:52:10 UTC, Kagamin wrote:
On Thursday, 22 June 2017 at 09:57:44 UTC, Andre Pany wrote:
This line raises the error:
TestStruct s2 = TestStruct(Reason.FU);
Error: cannot implicitly convert expression ("Fu") of type
Reason to InitialEnum!(Reason)
While this line is working fine:
TestStruct s1 = {reason: Reason.FU};
I think these should be equivalent, report a bug.
Issue 17552 created:
http://forum.dlang.org/post/mailman.3688.1498412595.31550.digitalmars-d-b...@puremagic.com
Kind regards
André
Re: About Dub capabilities
On Wednesday, 5 July 2017 at 06:06:18 UTC, Dukc wrote: On Tuesday, 4 July 2017 at 21:02:55 UTC, Martin Nowak wrote: preGenerate-/preBuildCommands are your friends to compile C++ code using dub. Hod did I not notice them... but that answers the question, thanks. See https://github.com/dlang-community/drepl/pull/63 for an example on how simple c/c++ files can be compiled "on-the-fly".
Re: Need simple sound
On Wednesday, 5 July 2017 at 09:43:05 UTC, Martin Tschierschke
wrote:
On Wednesday, 5 July 2017 at 07:21:45 UTC, Sebastiaan Koppe
wrote:
On Wednesday, 5 July 2017 at 05:34:37 UTC, FoxyBrown wrote:
On Tuesday, 4 July 2017 at 20:37:44 UTC, Sebastiaan Koppe
wrote:
Portaudio is simple as well. And nice cross platform.
are there any bindings?
Sure, see http://code.dlang.org/packages/portaudio
Sorry, for that question but now, as I have several different
options -
all not 'overdocumented' - so what would be the shortest
possible D program waiting for input and playing a sound from a
file in parallel?
Something short like the single-file dub example...?
#!/usr/bin/env dub
/+ dub.sdl:
name "hello"
+/
void main() {
writef("Do you like the music?");
char[] answer;
answer = readln();
writef("This was your Answer: ", answer);
}
This one plays a wav file. Couldn't get dub to do single-file on
it. It kept giving linker errors. (Took example from
https://github.com/v--/portaudio/blob/master/examples/pa_test.d)
**dub.sdl
name "audio"
description "plays audio file"
authors "Sebastiaan Koppe"
dependency "portaudio" version="==1.0.0"
dependency "wave-d" version="~>1.0.6"
configuration "executable" {
mainSourceFile "audio.d"
targetType "executable"
}
**audio.d
import std.stdio;
import waved;
import deimos.portaudio;
import std.conv, std.stdio;
import std.algorithm : min;
struct Audio {
float* samples;
size_t frames;
size_t position;
}
extern(C) int callback(const(void)* inputBuffer, void*
outputBuffer,
size_t framesPerBuffer,
const(PaStreamCallbackTimeInfo)*
timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData)
{
auto pout = cast(float*)outputBuffer;
Audio* audio = cast(Audio*)userData;
enum vol = 0.2f;
size_t frames = min(audio.frames - audio.position,
framesPerBuffer);
foreach(i; 0 .. frames)
*pout++ = vol * audio.samples[i + audio.position];
foreach(i; frames .. framesPerBuffer)
*pout++ = 0;
audio.position += framesPerBuffer;
return frames == framesPerBuffer ? paContinue : paComplete;
}
int main()
{
PaStream* stream;
PaError err;
Sound input = decodeWAV("my_wav_file.wav");
string answer;
auto audio = Audio(input.samples.ptr, input.samples.length);
if ((err = Pa_Initialize()) != paNoError) goto Lerror;
if ((err = Pa_OpenDefaultStream(,
0,
input.channels,
paFloat32,
cast(double)input.sampleRate,
paFramesPerBufferUnspecified,
,
))
!= paNoError) goto Lerror;
if ((err = Pa_StartStream(stream)) != paNoError) goto Lerror;
writef("Do you like the music?");
answer = readln();
writefln("This was your Answer: %s", answer);
if ((err = Pa_StopStream(stream)) != paNoError) goto Lerror;
if ((err = Pa_CloseStream(stream)) != paNoError) goto Lerror;
if ((err = Pa_Terminate()) != paNoError) goto Lerror;
return 0;
Lerror:
stderr.writefln("error %s", to!string(Pa_GetErrorText(err)));
return 1;
}
Re: Need simple sound
On Wednesday, 5 July 2017 at 07:21:45 UTC, Sebastiaan Koppe wrote:
On Wednesday, 5 July 2017 at 05:34:37 UTC, FoxyBrown wrote:
On Tuesday, 4 July 2017 at 20:37:44 UTC, Sebastiaan Koppe
wrote:
Portaudio is simple as well. And nice cross platform.
are there any bindings?
Sure, see http://code.dlang.org/packages/portaudio
Sorry, for that question but now, as I have several different
options -
all not 'overdocumented' - so what would be the shortest
possible D program waiting for input and playing a sound from a
file in parallel?
Something short like the single-file dub example...?
#!/usr/bin/env dub
/+ dub.sdl:
name "hello"
+/
void main() {
writef("Do you like the music?");
char[] answer;
answer = readln();
writef("This was your Answer: ", answer);
}
Re: Need simple sound
On Wednesday, 5 July 2017 at 05:34:37 UTC, FoxyBrown wrote: On Tuesday, 4 July 2017 at 20:37:44 UTC, Sebastiaan Koppe wrote: Portaudio is simple as well. And nice cross platform. are there any bindings? Sure, see http://code.dlang.org/packages/portaudio
Re: About Dub capabilities
On Tuesday, 4 July 2017 at 21:02:55 UTC, Martin Nowak wrote: preGenerate-/preBuildCommands are your friends to compile C++ code using dub. Hod did I not notice them... but that answers the question, thanks.
