On Friday, 5 March 2021 at 05:32:27 UTC, Jack wrote:
On Friday, 5 March 2021 at 02:43:36 UTC, H. S. Teoh wrote:
On Fri, Mar 05, 2021 at 02:13:39AM +, Jack via
Digitalmars-d-learn wrote:
something like filter[1] but that stops at first match? are
there any native functions for this in D or
On Thursday, 1 October 2020 at 06:32:23 UTC, Robert M. Münch
wrote:
5. One can't access the raw HTTP request body, things must be
go through Vibe's JSON parser. To get access to the raw body, a
lot of workarounds are necessary.
given an HTTPServerRequest req,
req.bodyReader.readAll for binary
On Friday, 28 February 2020 at 12:44:52 UTC, Namal wrote:
Hello,
I don't understand why this simple code causes a compiler
error..
import std.stdio;
void main(){
int b = 0;
for (b; b<3; b++){
writeln(b);
}
}
$Error: b has no effect
Well, that's the error. b has no
On Friday, 28 February 2020 at 08:08:59 UTC, Виталий Фадеев wrote:
Searching for beauty readable code...
The pattern throughout Phobos is static tests, like isInputRange!R
So something like this:
import std.stdio;
import std.traits;
template canOnKey(T) {
static if
On Wednesday, 19 February 2020 at 07:49:36 UTC, Namal wrote:
oooh... I used
str = std.readln();
to get my string and there must have been some other sign, line
break or whitespace or something at the end :(
Now I understand it, thx
That makes sense. readln includes the newline:
$ echo
On Wednesday, 19 February 2020 at 07:04:48 UTC, Namal wrote:
Hello, I wanted to remove the lastchar in a string and figured
that you can do that wit
str = str[0..$-2];
but why is
str = str[0..$] and str=str[0..$-1]
the same ?
Why do you think that they are the same?
$ rdmd --eval 'auto
On Monday, 17 February 2020 at 05:04:02 UTC, Adnan wrote:
What is the equivalent of Rust's chunks_exact()[1] method in D?
I want to iterate over a spitted string two chunks at a time.
[1]
https://doc.rust-lang.org/beta/std/primitive.slice.html#method.chunks_exact
And, after actually
On Monday, 17 February 2020 at 05:04:02 UTC, Adnan wrote:
What is the equivalent of Rust's chunks_exact()[1] method in D?
I want to iterate over a spitted string two chunks at a time.
[1]
https://doc.rust-lang.org/beta/std/primitive.slice.html#method.chunks_exact
$ rdmd --eval '"hello
On Saturday, 15 February 2020 at 11:32:42 UTC, AlphaPurned wrote:
I've tried 10 different ways with split and splitter, I've used
all the stuff that people have said online but nothing works. I
always get a template mismatch error.
Why is something so easy to do so hard in D?
auto toks =
On Tuesday, 14 January 2020 at 23:23:51 UTC, Jamie wrote:
I'm trying to initialise an associated array of associated
arrays with values, taking the same approach I would for an
associated array:
This works:
import std.stdio;
void main() {
string[string][string] table = ([
On Tuesday, 14 January 2020 at 16:39:16 UTC, mark wrote:
I can't help feeling that the foreach loop's block is rather
more verbose than it could be?
WordSet words;
auto rx = ctRegex!(r"^[a-z]+", "i");
auto file = File(filename);
foreach (line; file.byLine) {
auto
On Monday, 30 December 2019 at 19:46:50 UTC, Ron Tarrant wrote:
Thanks, mipri. Got it sorted. Here's a working proof...
```
import std.stdio;
import std.algorithm;
import std.conv;
void main(string[] args)
{
MyObject[] objectArray;
MyObject newObject;
MyObject
On Monday, 30 December 2019 at 19:08:27 UTC, Ron Tarrant wrote:
On Monday, 30 December 2019 at 17:12:26 UTC, MoonlightSentinel
wrote:
D disallows implicit conversion from integers to pointers and
hence they cannot be compared. You would need to explicitly
cast your ulong to an appropriate
On Monday, 30 December 2019 at 10:23:14 UTC, Marcone wrote:
On Monday, 30 December 2019 at 09:41:55 UTC, mipri wrote:
This leaks too much.
writeln("Helo {} {}".format("xx", "name")); // Helo xx name
writeln("Helo {} {}".format("{}", "name")); // Helo name {}
This function replace {}
On Monday, 30 December 2019 at 14:30:12 UTC, Ron Tarrant wrote:
On Sunday, 29 December 2019 at 09:44:18 UTC, MoonlightSentinel
wrote:
int i = a.countUntil(55);
I was trying to do this with an array of pointers, but I get an
error (which suggests to me that I don't know what data type a
On Monday, 30 December 2019 at 06:47:37 UTC, Marcone wrote:
Use Python format() style:
import std;
import std: Format = format;
// format()
string format(T...)(T text){
string texto = text[0];
foreach(count, i; text[1..$]){
texto = texto.replaceFirst("{}",
On Sunday, 29 December 2019 at 08:26:58 UTC, Daren Scot Wilson
wrote:
Reading documentation... Array, Algorithms, ... maybe I've been
up too late... how does one obtain the index of, say, 55 in an
array like this
int[] a = [77,66,55,44];
I want to do something like:
int i =
On Friday, 27 December 2019 at 06:08:16 UTC, Marcone wrote:
import std;
import core.thread;
auto threading(lazy void fun){ return
task!fun().executeInNewThread(); }
void main(){
threading(writeln("Hello World!"));
}
I want to create a function threading() to run some function in
On Wednesday, 25 December 2019 at 12:39:08 UTC, BoQsc wrote:
Are there any other ways to join two strings without Tilde ~
character?
I can't seems to find anything about Tilde character
concatenation easily, nor the alternatives to it. Can someone
share some knowledge on this or at least point
On Monday, 23 December 2019 at 13:34:55 UTC, BoQsc wrote:
I would love to see D language available out of box in major
Linux distributions and use without much care of installation.
Anyone have a though about it? Was there any serious efforts to
bring D language to Major distributions?
What
On Tuesday, 17 December 2019 at 07:40:28 UTC, AlphaPurned wrote:
if arr is a single array the follow code works(removing [i])
but if it is a double array it fails. arr as type double[A][B].
arr[i] has type double[A].
v ~= arr[i].map!(a=>to!string(a)~",").join;
with `Range = double[21]`
On Friday, 13 December 2019 at 15:20:02 UTC, Jesse Phillips wrote:
I had mentioned my take on list comprehension here:
https://forum.dlang.org/post/qslt0q$2dnb$1...@digitalmars.com#post-ycbohbqaygrgmidyhjma:40forum.dlang.org
However someone put together a more comprehensive tutorial of
its
On Sunday, 8 December 2019 at 20:50:05 UTC, Marcone wrote:
I want to add version to my program.
I have configurated my version file "version.txt", but I dont
know how link this file to my program. If Need spec file,
please send the exemple code of spec. Or is is possible add
version file by
On Sunday, 8 December 2019 at 08:01:32 UTC, Soulsbane wrote:
Been playing with Golang lately and it has quite a few modules
for terminal tables. For example this one:
github.com/brettski/go-termtables.
Is there a D equivalent package? Can't seem to find any via
search(which by the ways seems
On Sunday, 8 December 2019 at 06:42:22 UTC, Paul Backus wrote:
You can use the `require` function [1] for this:
with (userHistory.require(host).require(user)) {
if (isOk) ++ok; // renamed to avoid shadowing
else ++evil;
}
Many "methods" for built-in AAs are located in the `object`
Hello,
I've got this code:
struct UserStats {
int ok, evil;
}
// module-level variable
UserStats[string][string] userHistory;
and this code that populates it:
// loop over DB query
if (host !in userHistory)
userHistory[host] = typeof(userHistory[host]).init;
if
On Sunday, 8 December 2019 at 01:10:21 UTC, AA wrote:
I'd like to accept the return type of map. From some previous
questions that I should accept a template?
In general this is what you want to do with any kind of range
code, because you're not working with definite types, but with
types that
On Saturday, 7 December 2019 at 04:00:53 UTC, Marcone wrote:
import std;
alias cmd = compose!(to!bool, wait, spawnShell, to!string);
void main(){
writeln(cmd("where notepad.exe"));
}
Result:
C:\Windows\System32\notepad.exe
C:\Windows\notepad.exe
false
The result show "false"
On Friday, 6 December 2019 at 23:25:30 UTC, Johannes Loher wrote:
On Tuesday, 3 December 2019 at 10:06:22 UTC, Mike Parker wrote:
On Tuesday, 3 December 2019 at 10:03:22 UTC, Basile B. wrote:
That's interesting details of D developement. Since you reply
to the first message I think you have
On Tuesday, 3 December 2019 at 10:13:30 UTC, mipri wrote:
Speaking of nice stuff and aliases, suppose you want to
return a nice tuple with named elements?
Option 1: auto
auto option1() {
return tuple!(int, "apples", int, "oranges")(1, 2);
}
Option 2: redundancy
Tuple!(int,
On Tuesday, 3 December 2019 at 18:45:18 UTC, Jan Hönig wrote:
On Tuesday, 3 December 2019 at 13:55:51 UTC, Alex wrote:
This depends on the available accesses on your sets. In terms
of ranges:
Are your sets InputRanges, ForwardRange, ... ?
2) Are there some build-in function for handling
On Tuesday, 3 December 2019 at 10:02:47 UTC, Andrea Fontana wrote:
On Tuesday, 3 December 2019 at 09:48:39 UTC, Basile B. wrote:
You see what surprises me here is that we cannot express the
special type that is `TypeNull` and that can only have one
value (`null`) so instead we have to use
On Tuesday, 3 December 2019 at 09:22:49 UTC, Jan Hönig wrote:
Today i have stumbled on Hacker News into:
https://0.30004.com/
I am learning D, that's why i have to ask.
Why does
writefln("%.17f", .1+.2);
not evaluate into: 0.30004, like C++
but rather to:
On Tuesday, 26 November 2019 at 03:06:52 UTC, Omar wrote:
the page here https://dlang.org/spec/function.html
suggests you can implement a function in a different file
...
mentioned the endeavour of no-bodied-functions as a way of
presenting a black-box type of interface.
oh, that's what you
On Tuesday, 26 November 2019 at 03:06:52 UTC, Omar wrote:
Hey, I'm very interested in this programming language, I
already prefer it to C++ and if only i had adopted it years
ago, but that's beside the point.
I read a bunch of tuts today and the only thing I'm really
stuck on at the moment
On Monday, 25 November 2019 at 12:08:54 UTC, Per Nordlöw wrote:
On Monday, 25 November 2019 at 08:22:02 UTC, Jacob Carlborg
wrote:
On Sunday, 24 November 2019 at 21:49:19 UTC, Per Nordlöw wrote:
I guess we need a builtin language qualifier for scoped
classes for that to work, right?
We have
On Sunday, 24 November 2019 at 15:44:00 UTC, aliak wrote:
I'm writing some command line tooling stuff, and one of the
command spins up a docker compose file (which in short, spins
up some services and aggregates the output of each service to
stdout).
When a user presses ctrl+c, i would like
On Saturday, 23 November 2019 at 21:52:40 UTC, Adam D. Ruppe
wrote:
On Saturday, 23 November 2019 at 20:22:44 UTC, Ola Fosheim
Grøstad wrote:
I guess it is possible to use introspection somehow?
Yeah, you have to write a function that checks it with
introspection and then static assert on it
On Saturday, 23 November 2019 at 11:21:32 UTC, Ola Fosheim
Grøstad wrote:
...
I read your question as "can I have typeclasses in D?"
I'll refer to typeclasses in a language other than Rust. You
don't need to know the language. I think you knowing Rust at
all might be clouding your vision,
On Saturday, 23 November 2019 at 09:54:48 UTC, aliak wrote:
Is there a way to go about killing a process after spawning it
on a SIGINT?
I can't do this for e.g. because kill is not @nogc.
Well, this works:
import std;
import core.stdc.signal;
extern(C) int kill(int pid, int sig) nothrow
On Friday, 22 November 2019 at 04:41:30 UTC, mipri wrote:
~this() { reset(); }
Oh, if you don't ever call raw() this will break your terminal.
I just copied some code from a toy program and adapted it, and
didn't notice that until I posted.
On Friday, 22 November 2019 at 04:22:07 UTC, FireController#1847
wrote:
Right, but readln will only wait until the user presses the
delimiter (by default Enter/Return). I want it to wait until
ANY key is pressed, not a specific key
If curses is available you can use it, at the cost of
On Friday, 22 November 2019 at 04:10:23 UTC, FireController#1847
wrote:
I'm an extreme beginner to DLang (just started using it.. oh,
an hour ago?), and I already can't figure out a, what I'd
consider, fairly simplistic thing.
This is my current code:
module DTestApp1;
import std.stdio;
On Friday, 22 November 2019 at 03:42:26 UTC, dokutoku wrote:
Is there a difference in the execution speed and stability when
executing the program by rewriting the parameter of the
function argument like this?
```d
void test1 (int * X)
{
// some processing
}
void test2 (ref int X)
{
On Wednesday, 20 November 2019 at 10:05:11 UTC, zoujiaqing wrote:
import std.stdio;
class A
{
this(T)(T t)
{
}
void write()
{
T _this = cast(T) this;
writeln(this.v);
Here, class A knows that a 'v' member is present. So why not just
put that member in
On Monday, 18 November 2019 at 21:25:12 UTC, kerdemdemir wrote:
It is a bit weird that such a general case like removing list
of elements does not work.
And I really do not know the real use of
[0,1,2,3].remove(1,2,3). I mean in unit test it looks cool but
in real life you will have
On Monday, 18 November 2019 at 21:08:39 UTC, Luiz Silveira wrote:
double f;
If this is changed to `real f;`, you get the desired result.
real is also the type used for the comparison code:
https://dlang.org/spec/float.html#fp_const_folding
Howdy,
The following program fails to compile if the second line
is uncommented:
import std;
void main() {
writeln([1, 2, 3].choice);
//writeln(['a', 'b', 'c'].choice);
}
Error: template std.random.choice cannot deduce function from
argument types !()(char[],
On Wednesday, 13 November 2019 at 14:01:13 UTC, BoQsc wrote:
I don't like to see exclamation marks in my code in as weird
syntax as these ones:
to!ushort(args[1])
s.formattedRead!"%s!%s:%s"(a, b, c);
I'd suggest learning to love it, or at least getting to it, vs.
to(args[1]) C++ syntax.
On Monday, 28 October 2019 at 08:51:02 UTC, Daniel Kozak wrote:
On Mon, Oct 28, 2019 at 9:40 AM Per Nordlöw via
Digitalmars-d-learn wrote:
Is it possible to run the unittests of a module with -betterC
like
dmd -D -g -main -unittest -betterC f.d
?
This currently errors as
On Friday, 25 October 2019 at 15:52:50 UTC, Paul Backus wrote:
On Friday, 25 October 2019 at 09:25:21 UTC, Dennis wrote:
I can overload the 'in' operator on my types to something that
takes exponential time if I want, just like "+" can also be
overloaded to a linear time operation on e.g.
On Friday, 11 October 2019 at 19:53:33 UTC, Ron Tarrant wrote:
Pixbuf airportImage1, airportImage2, airportImage3,
airportImage4;
void * image1, image2, image3, image4;
airportImage1 = new Pixbuf("images/airport_25.png");
airportImage2 = new Pixbuf("images/airport_35.png");
airportImage3 = new
On Tuesday, 8 October 2019 at 10:48:45 UTC, Jonathan M Davis
wrote:
The result of this is that code like
stack.popBack();
stack ~= foo;
stack ~= bar;
stack.popBack();
stack ~= baz;
will end up allocating all over the place. Every time you
append to the array after shrinking it, you're going to
On Monday, 7 October 2019 at 19:16:31 UTC, IGotD- wrote:
On Monday, 7 October 2019 at 17:36:09 UTC, Ferhat Kurtulmuş
wrote:
I'm not talking about memory deletion. I'm talking about
push, pop, enqueue, and dequeue behavior. I'd assume in a
garbage collected language letting the reference
On Monday, 7 October 2019 at 17:11:08 UTC, Just Dave wrote:
I need a stack and a queue and I noticed that the standard
library doesn't appear to have one. Which is ok. I just need
something that can logically behave as a stack and queue, which
I think the dynamic array should be able to do (if
On Friday, 4 October 2019 at 20:56:31 UTC, Greatsam4sure wrote:
On Tuesday, 1 October 2019 at 09:58:42 UTC, Ron Tarrant wrote:
Here's the second installment of the Nodes-n-noodles coverage
in which we get the mouse involved:
https://gtkdcoding.com/2019/10/01/0075-cairo-x-mouse-noodle.html
On Friday, 4 October 2019 at 19:58:16 UTC, Andre Pany wrote:
Hi,
I try to solve the puzzle
https://www.codingame.com/training/easy/mime-type but have some
issue because std.path:extension returns null for file name
".pdf" while the puzzle (test case 3) expects that the
extension is ".pdf".
On Thursday, 3 October 2019 at 08:52:22 UTC, Andrea Fontana wrote:
On Thursday, 3 October 2019 at 05:33:04 UTC, mipri wrote:
void main() {
import std.range : iota;
foreach (x; iota(1, 10).withHistory)
writeln(x);
}
This doesn't work as expected, I think.
auto r =
On Thursday, 3 October 2019 at 08:52:22 UTC, Andrea Fontana wrote:
On Thursday, 3 October 2019 at 05:33:04 UTC, mipri wrote:
void main() {
import std.range : iota;
foreach (x; iota(1, 10).withHistory)
writeln(x);
}
This doesn't work as expected, I think.
auto r =
On Thursday, 3 October 2019 at 05:20:47 UTC, mipri wrote:
It'd be nicer to do compose a range over iota, as in
iota(1, 10).newThingWithHistory
but I don't know how to do that yet. I guess c.f.
std.range.retro
This is a bit better:
#! /usr/bin/env rdmd
import std.stdio;
auto
On Thursday, 3 October 2019 at 04:33:10 UTC, Brett wrote:
I routinely have to generate data using points sequentially and
refer to previous points in the data set, maybe even search
them. I also may have to break up the algorithm in to parts.
I'd like to get more in to ranges but I simply do
On Thursday, 3 October 2019 at 04:33:26 UTC, Brett wrote:
I was trying to avoid such things since X is quite long in
name. Not a huge deal... and I do not like the syntax because
it looks like a constructor call.
It is a constructor call, though. You can define your own as well:
#!
On Thursday, 3 October 2019 at 04:32:52 UTC, Brett wrote:
struct Y { double q; }
struct X { Y[] a; }
X x;
auto r = x.a;
r is not a reference?!?!
Arrays are (ptr,length) pairs. r is a copy of them:
#! /usr/bin/env rdmd
import std.stdio;
struct X { int[] a; }
void main() {
On Wednesday, 2 October 2019 at 17:37:57 UTC, Brett wrote:
X y = {3};
works fine.
So one has to do
x[0] = y;
You could initialize x all at once. Complete example:
import std.stdio;
struct Point {
int x, y;
string toString() {
import std.format : format;
On Wednesday, 2 October 2019 at 17:54:20 UTC, H. S. Teoh wrote:
On Wed, Oct 02, 2019 at 05:37:57PM +, Brett via
Digitalmars-d-learn wrote:
struct X { int a; }
X[1] x;
x[0] = {3};
or
x[0] = {a:3};
fails;
This works:
x[0] = X(123);
I'd knew I'd gotten the impression from
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