On Wednesday, 8 December 2021 at 11:23:45 UTC, BoQsc wrote:
Let's say I want to skip characters and build a new string.
The string example to loop/iterate:
```
import std.stdio;
void main()
{
string a="abc;def;ab";
}
```
The character I want to skip: `;`
Expected result:
```
abcdefab
On Monday, 15 January 2018 at 19:05:52 UTC, xenon325 wrote:
I think, most clear code would be with tripple `foreach`, so
I'll go with that. But probably someone will come up with
something better and range-ier.
I will admit clarity has suffered, but I like the brevity:
import std.json :
On Wednesday, 27 December 2017 at 21:42:53 UTC, Mengu wrote:
On Wednesday, 27 December 2017 at 21:39:49 UTC, Mengu wrote:
On Wednesday, 27 December 2017 at 20:54:17 UTC, bitwise wrote:
[...]
there's also a simple workaround for fields with the same
type: https://run.dlang.io/is/dsFajq
On Wednesday, 27 December 2017 at 18:08:19 UTC, Bastiaan Veelo
wrote:
I suppose the following is not a bug, but confusing it is:
```
void main()
{
import std.stdio;
import std.bitmanip;
BitArray ba = [1, 1, 1, 1, 1, 1, 1, 1];
writeln(ba);// [1, 1, 1, 1, 1, 1, 1, 1]
On Friday, 15 December 2017 at 17:24:33 UTC, Vino wrote:
Hi Biotronic,
I was able to find a solution using container array and also
date formatting, below is the code, please do let me know if
you find any issue, as i have tested the script and it is
working as expected.
Program:
import
On Thursday, 14 December 2017 at 22:47:15 UTC, dark777 wrote:
I know that this community is not from c ++, but for some time
I studied how to do overload of ostream operators in c ++ and I
even managed to get to this result, I got to this result in
another post done here but I did not
On Tuesday, 12 December 2017 at 15:19:35 UTC, Vino wrote:
import std.algorithm: filter, map, sort;
import std.container.array;
import std.file: SpanMode, dirEntries, isDir ;
import std.stdio: writefln;
import std.typecons: Tuple, tuple;
import std.datetime.systime: SysTime;
void main () {
auto
On Tuesday, 12 December 2017 at 16:54:17 UTC, Biotronic wrote:
There is no way in C++ to set the format the way you want it.
If you want binary output, you need to call a function like
your binario function.
Of course this is not entirely true - there is a way, but it's
ugly and probably not
On Tuesday, 12 December 2017 at 15:52:09 UTC, dark777 wrote:
I know that this community is not of c ++, but some time I have
been studying how to do overload of ostream operators in c ++
and I even managed to get to this result but the same is not
converting to binary only presents zeros as
On Monday, 11 December 2017 at 19:46:04 UTC, Vino wrote:
import std.algorithm;
import std.container.array;
import std.file: SpanMode, dirEntries, isDir ;
import std.stdio: writefln, writeln;
import std.typecons: Tuple, tuple;
import std.range: chain;
void main () {
auto FFs =
On Monday, 11 December 2017 at 15:33:08 UTC, Vino wrote:
On Monday, 11 December 2017 at 15:15:47 UTC, Biotronic wrote:
On Monday, 11 December 2017 at 14:52:35 UTC, Vino wrote:
Example Program and Output
import std.algorithm: filter, map, sort;
import std.container.array;
import std.file:
On Monday, 11 December 2017 at 15:33:08 UTC, Vino wrote:
I tired that but no luck, below is the output, in your code
you have one folder "auto folders = ["D:\\Dev"];" if you have
multiple folder then output is not sorted.
Works on my machine. Of course, since time toSimpleString returns
On Monday, 11 December 2017 at 14:52:35 UTC, Vino wrote:
Example Program and Output
import std.algorithm: filter, map, sort;
import std.container.array;
import std.file: SpanMode, dirEntries, isDir ;
import std.range: chain;
import std.stdio: writefln;
import std.typecons: Tuple, tuple;
void
On Wednesday, 6 December 2017 at 10:16:16 UTC, helxi wrote:
On Wednesday, 6 December 2017 at 10:00:48 UTC, Biotronic wrote:
AliasSeq!(a, b) = tuple(
a * (2*b - a),
a*a + b*b);
[...]
Nice. But why the AliasSeq?
Just playing around a bit. The alternative is to
On Wednesday, 6 December 2017 at 09:12:08 UTC, helxi wrote:
This is question not directly related to language concepts,
it's got more to do with the application. I would appreciate if
anyone would point to me how I could optimize this bit of code
Here's my version:, based on fast squaring:
On Wednesday, 6 December 2017 at 08:59:09 UTC, Fredrik Boulund
wrote:
string word = "longword";
writeln(sort(word));
But that doesn't work because I guess a string is not the type
of range required for sort?
Yeah, narrow (non-UTF-32) strings are not random-access, since
characters like
On Tuesday, 5 December 2017 at 23:01:43 UTC, aliak wrote:
immutable lambda(T) = (T n) => n * n;
Generally, you'd want to write
alias lambda = n => n * n;
instead. That said, I don't see any reason why your syntax
shouldn't work, and would argue it's a bug. Please file it in
Bugzilla.
On Tuesday, 21 November 2017 at 09:21:29 UTC, Chirs Forest wrote:
I'm interpolating some values and I need to make an
(elapsed_time/duration) value a float between 0 and 1
(inclusive of 0 and 1). The elapsed_time might be more than the
duration, and in some cases might be 0 or less. What's the
On Wednesday, 15 November 2017 at 08:43:01 UTC, Tony wrote:
Error: function test_warnings.MyClass.SomeMethod has no return
statement, but is expected to return a value of type int
but if I make it a template class:
class MyClass(T) {
there is no compile error. I don't know why the error
On Tuesday, 24 October 2017 at 11:37:42 UTC, Per Nordlöw wrote:
On Tuesday, 24 October 2017 at 07:56:34 UTC, Biotronic wrote:
struct SuppressPostblit(T)
{
// Disguise T as a humble array.
private ubyte[T.sizeof] _payload;
...
A bit too hackish for my taste, but does the job still.
On Tuesday, 24 October 2017 at 07:33:43 UTC, Per Nordlöw wrote:
If I have a `struct X` (container in my case) with disabled
copying (postblit) and instead a .dup property, is it somehow
possible, unsafe or not, to have `X` as a member of another
`struct Y` with an enabled copy constructor
On Wednesday, 18 October 2017 at 12:32:31 UTC, Nordlöw wrote:
Further, are we forced to use the GC for Fiber allocation or
can a sub-class of Fibers implement its own allocation strategy?
Afraid it's set in stone. Now, it doesn't actually use the GC for
allocating the stack memory, instead
On Wednesday, 18 October 2017 at 11:34:57 UTC, Nordlöw wrote:
Another thing...how should the synchronization between the
fibers figure out when the total number of fibers have reached
one million?...via an atomic counter fed by reference to the
constructor...or are there better ways? Because I
On Wednesday, 18 October 2017 at 10:55:49 UTC, Per Nordlöw wrote:
On Wednesday, 18 October 2017 at 10:36:41 UTC, Per Nordlöw
wrote:
Yeah I've thought of that.
I still would like to have it built-in to the compiler.
Would such a change cause any serious breakage?
Seems unlikely - when did
On Wednesday, 18 October 2017 at 11:01:56 UTC, Per Nordlöw wrote:
On Wednesday, 18 October 2017 at 09:01:30 UTC, Per Nordlöw
wrote:
Creates an actor (goroutine, whatever), which spawns 10 new
actors, each of them spawns 10 more actors, etc. until one
million actors are created on the final
On Wednesday, 18 October 2017 at 09:56:33 UTC, Nordlöw wrote:
On Wednesday, 18 October 2017 at 09:32:39 UTC, Jonathan M Davis
wrote:
On Wednesday, October 18, 2017 09:13:47 Per Nordlöw via
Digitalmars-d-learn wrote:
Are there any nearby plans to make more template
instantiations (especially
It's worth pointing out, btw, that the main reason for this code
is to help drug diagnose his or her problem, not to be the
be-all, end-all of stack identifying functions. :)
It will of course not correctly identify pointers to variables on
other threads' stacks, and fiber stacks probably
On Tuesday, 17 October 2017 at 23:59:19 UTC, Steven Schveighoffer
wrote:
On 10/17/17 7:32 PM, flamencofantasy wrote:
On Tuesday, 17 October 2017 at 17:27:17 UTC, Biotronic wrote:
On Tuesday, 17 October 2017 at 15:33:02 UTC, drug wrote:
[...]
I have very little knowledge about sbrk, so
On Tuesday, 17 October 2017 at 15:33:02 UTC, drug wrote:
My code fails and I guess the reason is I have a slice to data
in the stack and it becomes garbage in some moment. So I need a
way to check where data is placed. Is it right that it can be
done in linux using `sbrk` so that if the addr
On Monday, 16 October 2017 at 23:56:00 UTC, Nicholas Wilson wrote:
using fullyQualifiedName [here]
(https://github.com/libmir/dcompute/blob/master/source/dcompute/driver/ocl/util.d#L120)
leads to a large compilation slowdown, but I only need it to
disambiguate up to the module level i.e. so
On Monday, 16 October 2017 at 12:00:13 UTC, drug wrote:
I refactored `MyStructure` added own implementation of malloced
array based on pureRealloc/pureFree instead of dynamic array I
used before and now I have error:
Error: cannot implicitly convert expression get(msg.getData())
of type
On Friday, 13 October 2017 at 10:35:56 UTC, Jack Applegame wrote:
Compiler creates struct on the stack and silently (without
postblitting and destruction old object) moves it to another
address. Is it normal? I don't think so.
It is. Structs have no identity, and the compiler/GC/whatever is
On Wednesday, 4 October 2017 at 19:20:12 UTC, Jesse Phillips
wrote:
On Wednesday, 4 October 2017 at 15:26:02 UTC, Ali Çehreli wrote:
On 10/04/2017 02:04 AM, Biotronic wrote:
...
Hey where is the list of features used e.g: ranges, ufcs...
Features used: D.
But sure, added them to the gist:
On Wednesday, 4 October 2017 at 09:04:58 UTC, Biotronic wrote:
Since the code uses ranges though, a simple replacement of
readText with an mmapped equivalent should enable humongous
file support with no other code change required.
Drop-in replacement for readText:
struct MmText {
import
On Wednesday, 4 October 2017 at 09:32:31 UTC, drug wrote:
I need to separate templates:
```
foreach(member; __traits(allMembers, V))
{
static if (__traits(compiles, { auto _val =
&__traits(getMember, value, member); })
{
// a template needs to be instantiated to be addressable, so
On Tuesday, 3 October 2017 at 19:25:56 UTC, Ali Çehreli wrote:
Found on Reddit:
https://www.reddit.com/r/programming/comments/740617/the_expressive_c17_coding_challenge/
How would you do it in D?
Ali
P.S. You can ignore the following note from the challenge text;
I don't think it applies
On Monday, 2 October 2017 at 09:34:29 UTC, Andrea Fontana wrote:
Anyway: you cant put a default destructor on struct
True. In which case you should either @disable this() (which
presents its own set of issues) or hide b behind a @property
function, something like:
struct S {
B _b;
On Monday, 2 October 2017 at 08:47:47 UTC, Andrea Fontana wrote:
Why this code doesn't write two identical lines?
https://dpaste.dzfl.pl/e99aad315a2a
Andrea
A reduced example of where it goes wrong:
class B {}
struct A {
B b = new B;
}
unittest {
A a1, a2;
assert(a1 == a2);
}
On Sunday, 24 September 2017 at 18:46:15 UTC, Haridas wrote:
Also consider the following code. Please let me know if I am
doing the right thing for dynamic arrays. My hack seems to have
the desired effect on shutting down the destructor. Is this
hack legal use of D? Can you please guide me
On Tuesday, 12 September 2017 at 19:59:52 UTC, Joseph wrote:
The compiler shouldn't arbitrarily force one to make arbitrary
decisions that waste time and money.
Like having a type system? Having to do *cast(int*) to
interpret a string as an int isn't strictly necessary, and wastes
dev time
The simplest example of a cycle is probably this:
module A;
import B;
int n1 = 17;
static this() {
n1 = n2;
}
//
module B;
import A;
int n2 = 42;
static this() {
n2 = n1;
}
What's the value of n1 and n2 after module constructors are run?
Since both module constructors can run
On Tuesday, 12 September 2017 at 09:11:20 UTC, Joseph wrote:
I have two nearly duplicate files I added a static this() to
initialize some static members of an interface.
On one file when I add an empty static this() it crashes while
the other one does not.
The exception that happens is
On Friday, 8 September 2017 at 12:32:35 UTC, Jiyan wrote:
On Friday, 8 September 2017 at 06:37:54 UTC, Biotronic wrote:
On Thursday, 7 September 2017 at 23:40:11 UTC, Jiyan wrote:
[...]
Sadly, even std.typecons.scoped isn't currently @nogc:
https://issues.dlang.org/show_bug.cgi?id=13972
On Thursday, 7 September 2017 at 23:40:11 UTC, Jiyan wrote:
Hey,
wanted to know whether it is possible to make anonymous nogc
classes:
interface I
{
public void ap();
}
void exec(I i)
{
i.ap;
}
// now execute, but with something like `scope`
exec( new class I
{
int
On Thursday, 7 September 2017 at 16:55:02 UTC, EntangledQuanta
wrote:
Sorry, I think you missed the point completely... or I didn't
explain things very well.
I don't think I did - your new explanation didn't change my
understanding at least. This indicates I'm the one who's bad at
On Wednesday, 6 September 2017 at 23:20:41 UTC, EntangledQuanta
wrote:
So, no body thinks this is a useful idea or is it that no one
understands what I'm talking about?
Frankly, you'd written a lot of fairly dense code, so
understanding exactly what it was doing took a while. So I sat
down
On Saturday, 2 September 2017 at 01:41:14 UTC, Nicholas Wilson
wrote:
On Friday, 1 September 2017 at 11:33:15 UTC, Biotronic wrote:
On Friday, 1 September 2017 at 10:15:09 UTC, Nicholas Wilson
wrote:
So I have the following types
struct DevicePointer(T) { T* ptr; }
struct Buffer(T)
{
On Saturday, 2 September 2017 at 00:43:00 UTC, Nicholas Wilson
wrote:
On Friday, 1 September 2017 at 22:10:43 UTC, Biotronic wrote:
struct int24 {
ubyte[3] _payload;
this(int x) {
value = x;
}
...
}
You may also want to put an align(1) on it so that you dont
waste
On Friday, 1 September 2017 at 20:58:20 UTC, EntangledQuanta
wrote:
template(A, B...)
{
auto foo(C...)(C c)
{
... get c's parameter names, should be alpha, beta
}
}
foo!(., .)(alpha, beta)
I need the actual identifiers passed to foo. I can get the
types(obviously C) but when
On Friday, 1 September 2017 at 19:39:14 UTC, EntangledQuanta
wrote:
Is there a way to create a 24-bit int? One that for all
practical purposes acts as such? This is for 24-bit stuff like
audio. It would respect endianness, allow for arrays int24[]
that work properly, etc.
I haven't looked at
On Friday, 1 September 2017 at 10:15:09 UTC, Nicholas Wilson
wrote:
So I have the following types
struct DevicePointer(T) { T* ptr; }
struct Buffer(T)
{
void* driverObject;
T[] hostMemory;
}
and a function
auto enqueue(alias k)(HostArgsOf!k) { ... }
where k would be a function like
On Thursday, 31 August 2017 at 15:48:12 UTC, EntangledQuanta
wrote:
On Thursday, 31 August 2017 at 10:34:14 UTC, Kagamin wrote:
On Thursday, 31 August 2017 at 00:49:22 UTC, EntangledQuanta
wrote:
I've already implemented a half ass library solution.
It can be improved alot.
Then, by all
On Wednesday, 30 August 2017 at 06:16:16 UTC, Vino.B wrote:
On Tuesday, 29 August 2017 at 18:39:03 UTC, Ali Çehreli wrote:
https://dlang.org/phobos/std_algorithm_setops.html#.setDifference
I tried the setDifference but does seem to be working as
expected
From the documentation of
On Wednesday, 16 August 2017 at 12:50:07 UTC, Suliman wrote:
MyStruct[] is actually a struct similar to this:
struct MyStruct[] {
MyStruct* ptr;
size_t length;
}
That struct is placed on the stack, but the data it points to,
via the ptr field, is heap allocated.
What is struct? Just
On Wednesday, 16 August 2017 at 07:39:01 UTC, Suliman wrote:
On the heap, unless you are allocating it via e.g. alloca.
If
struct MyStruct
{
int x;
int y;
}
MyStruct mystruct;
is located on stack, why:
MyStruct [] mystructs;
should located on heap?
MyStruct[] is actually a struct
On Wednesday, 9 August 2017 at 01:39:07 UTC, Jason Brady wrote:
Why does the following code error out with:
app.d(12,10): Error: function app.FunctionWithArguments (uint
i) is not callable using argument types ()
Like Olivier said, stringof expects a valid expression. There are
a few other
On Wednesday, 12 July 2017 at 12:20:11 UTC, Miguel L wrote:
What is the best way in D to create a function that receives a
static array of any length?
You will need to use templates:
void foo(size_t N)(int[N] arr) {
}
--
Biotronic
On Wednesday, 12 July 2017 at 12:08:35 UTC, Jacob Carlborg wrote:
On 2017-07-12 11:28, Biotronic wrote:
That's basically what I tried to say
It wasn't very clear to me at least.
Yeah, I see it in retrospect. "might collect memory that the
thread is referencing on the stack or in non-GC
On Wednesday, 12 July 2017 at 12:02:37 UTC, Jiyan wrote:
Thank you, one last question:
If i declare the parameter as ref i, then there shouldnt be any
overhead wouldnt it?
Thanks :)
That would be basically the exact equivalent - instead of passing
an int, you'll be passing a pointer.
--
On Wednesday, 12 July 2017 at 11:34:45 UTC, Jiyan wrote:
Hey,
yes i did but to be honest i used dmd in debug version.
The thing about the static one, is that it creates a local
object A isnt that a performance issue itself - or am i wrong -
im confused actually :P?
Debug = no optimization.
On Wednesday, 12 July 2017 at 11:00:54 UTC, Jiyan wrote:
Hey there:)
i want to know whether the following is somehow possible:
structs dont have default constructors, i know so:
struct A
{
int field;
this(int i){field = getDataFromFile("file.txt");}
}
A instance = A(0);
Here comes my issue:
On Wednesday, 12 July 2017 at 09:10:07 UTC, Jacob Carlborg wrote:
On 2017-07-11 08:18, Biotronic wrote:
If DRuntime is not made aware of the thread's existence, the
thread will not be stopped by the GC, and the GC might collect
memory that the thread is referencing on the stack or in
non-GC
On Monday, 10 July 2017 at 20:03:32 UTC, Igor Shirkalin wrote:
Hello!
I have written some D code that I need to link to :C++ huge
project. Let it be just one function that uses GC. The question
is: if C++ code creates several threads and runs this :D
function simultaneously, will GC work
On Thursday, 15 June 2017 at 18:49:58 UTC, Jesse Phillips wrote:
wrap!IDuck
Ah, so it does exist in Phobos. I thought it should be there, but
didn't find it. Thanks!
--
Biotronic
On Wednesday, 14 June 2017 at 09:34:27 UTC, Balagopal Komarath
wrote:
void main()
{
Test!Duck d;
}
As has been pointed out at length by others here, it's simply not
how alias this is intended to work. I do see some arguments in
favor of working that way, but I'm not sure what's the
On Monday, 12 June 2017 at 01:36:04 UTC, Stefan Koch wrote:
On Monday, 12 June 2017 at 01:02:58 UTC, helxi wrote:
Is it possible to sum an array in O(1)?
No.
If you want to sum the elements you have to at-least look at
all the elements.
So it'll always be O(N).
it's the best you can do.
On Wednesday, 7 June 2017 at 12:39:07 UTC, Russel Winder wrote:
Are there any idiom rules as to where to put import statements
in D?
In Python they can go anywhere but PEP-8 suggests they should
all go at the top of a file, just after the module
documentation string.
I don't know if there
On Wednesday, 7 June 2017 at 05:43:06 UTC, ag0aep6g wrote:
[snip]
It seems to me this is a topic worthy of a more in-depth article.
If only I felt up to that. :p
When you create a slice 'a' in D (with the current GC and
druntime, at least), what happens behind the scenes is the
allocator
On Friday, 2 June 2017 at 13:32:02 UTC, Suliman wrote:
I remember that there was topic about remobing data from
struct/arrays of structs. But I do not remember what is
idiomatic way to do it, and can't google it.
something like:
struct MyTrack
{
ulong id;
string
On Tuesday, 30 May 2017 at 13:45:07 UTC, Rene Zwanenburg wrote:
On Tuesday, 30 May 2017 at 11:34:52 UTC, ketmar wrote:
If malloc were marked as pure, wouldn't that mean it must
return the same pointer every time you call it with the same
size?
of course. but D "pure" is not what other world
On Tuesday, 30 May 2017 at 10:46:12 UTC, Andrew Edwards wrote:
On Tuesday, 30 May 2017 at 10:37:58 UTC, Biotronic wrote:
On Tuesday, 30 May 2017 at 10:31:24 UTC, Daniel Kozak wrote:
import std.traits : fqn = fullyQualifiedName;
Darnit. I just googled the template and got a result talking
On Tuesday, 30 May 2017 at 10:31:24 UTC, Daniel Kozak wrote:
import std.traits : fqn = fullyQualifiedName;
Darnit. I just googled the template and got a result talking
about fqn!T. So yeah - this code:
import std.traits;
pragma(msg, fullyQualifiedName!ImVec2);
pragma(msg,
On Tuesday, 30 May 2017 at 10:09:50 UTC, Andrew Edwards wrote:
What does that even mean?
Scenario:
bool func(const ImVec2 label_size)
{
return true;
}
void main()
{
//first attempt:
const ImVec2 label_size = CalcTextSize(label.ptr, null,
true);
//Error: cannot implicitly
On Monday, 22 May 2017 at 08:58:24 UTC, biocyberman wrote:
@Nicolas Wilson: Your explanation of the enum is clear and very
helpful. I can recall to the same technique used in kh_hash in
samtools and the associated. With that said, the chars enum is
only to 'T' (85) elements.
The reason for
On Friday, 19 May 2017 at 22:53:39 UTC, crimaniak wrote:
On Friday, 19 May 2017 at 12:55:05 UTC, Biotronic wrote:
revComp6 seems to be the fastest, but it's probably also the
least readable (a common trade-off).
Try revComp7 with -release :)
string revComp7(string bps)
{
char[] result =
On Friday, 19 May 2017 at 12:21:10 UTC, biocyberman wrote:
1. Why do we need to use assumeUnique in 'revComp0' and
'revComp3'?
D strings are immutable, so if I'd created the result array as a
string, I couldn't change the individual characters. Instead, I
create a mutable array, change the
On Friday, 19 May 2017 at 07:29:44 UTC, biocyberman wrote:
I am solving this problem http://rosalind.info/problems/revc/
as an exercise to learn D. This is my solution:
https://dpaste.dzfl.pl/8aa667f962b7
Is there some D tricks I can use to make the
`reverseComplement` function more concise
On Friday, 5 May 2017 at 09:14:21 UTC, Biotronic wrote:
Here's an implementation that supports start of year, month,
week, day, hour, minute and second. Works for DateTime and
SysTime. Not heavily tested (all tests included):
As the last sentence says, there were holes in the testing,
On Friday, 5 May 2017 at 08:02:15 UTC, Dukc wrote:
I have a time point, be it SysTime or DateTime, whatever. I
want to trunctate it to weeks, eg. I want it to become the
first point of time during the week it was representing. What's
a good way to do that? Only hacks came to my mind.
The
On Friday, 8 May 2015 at 21:56:56 UTC, Brian Schott wrote:
Allowing template Tem(alias Args ...) syntax would let me
trace multiple variables at once.
Actually, this already works:
void traceVars(alias T, U...)() {
import std.stdio : writeln;
writeln(T.stringof, : , T);
static if
80 matches
Mail list logo
