Just started looking at D, very promising!
One of the first programs I constructed involved infinite
sequences. A design question that showed up is whether to
construct the range as a struct/value, or class/reference. It
appears that structs/values are more the norm, but there are
On Monday, 9 November 2015 at 02:44:48 UTC, TheFlyingFiddle wrote:
On Monday, 9 November 2015 at 02:14:58 UTC, Jon D wrote:
Here's an example of the behavior differences below. It uses
refRange, but same behavior occurs if the range is created as
a class rather than a struct.
--Jon
This is
I'd like to chain several ranges and operate on them. However, if
the chains are different lengths, the data type is different.
This makes it hard to use in a general way. There is likely an
alternate way to do this that I'm missing.
A short example:
$ cat chain.d
import std.stdio;
import
On Tuesday, 17 November 2015 at 23:22:58 UTC, Brad Anderson wrote:
One solution:
[snip]
Thanks for the quick response. Extending your example, here's
another style that works and may be nicer in some cases.
import std.stdio;
import std.range;
import std.algorithm;
void main(string[]
On Wednesday, 9 December 2015 at 21:23:03 UTC, Daniel Kozák wrote:
V Wed, 09 Dec 2015 21:10:43 +
Jon D via Digitalmars-d-learn
<digitalmars-d-learn@puremagic.com>
napsáno:
There is a fair bit of range related code in the standard
library structured like:
auto MyRange(Range)
There is a fair bit of range related code in the standard library
structured like:
auto MyRange(Range)(Range r)
if (isInputRange!Range)
{
static struct Result
{
private Range source;
// define empty, front, popFront, etc
}
On Thursday, 10 December 2015 at 00:36:27 UTC, Jon D wrote:
Question I have is if there is a better way to do this. For
example, a different way to construct the lazy
'decodeUTF8Range' rather than writing it out in this fashion.
A further thought - The decodeUTF8Range function is basically
I want to combine block reads with lazy conversion of utf-8
characters to dchars. Solution I came with is in the program
below. This works fine. Has good performance, etc.
Question I have is if there is a better way to do this. For
example, a different way to construct the lazy
On Tuesday, 15 December 2015 at 03:31:18 UTC, Shriramana Sharma
wrote:
For instance, hyphens are often used as part of executable
names on Linux, but if I do this:
$ dmd usage-printer.d
I get the following error:
usage-printer.d: Error: module usage-printer has non-identifier
characters
On Sunday, 22 November 2015 at 00:10:07 UTC, Ali Çehreli wrote:
May I suggest that you improve that page. ;) If you don't
already have a clone o the repo, you can do it easily by
clicking the "Improve this page" button on that page.
Hi Ali, thanks for the quick response. And point taken :) I
Something I found confusing was the relationship between array
capacity and copy(). A short example:
void main()
{
import std.algorithm: copy;
auto a = new int[](3);
assert(a.length == 3);
[1, 2, 3].copy(a); // Okay
int[] b;
b.reserve(3);
assert(b.capacity >=
On Sunday, 22 November 2015 at 00:31:53 UTC, Jonathan M Davis
wrote:
Honestly, arrays suck as output ranges. They don't get appended
to; they get filled, and for better or worse, the documentation
for copy is probably assuming that you know that. If you want
your array to be appended to when
On Tuesday, 24 November 2015 at 01:00:40 UTC, Steven
Schveighoffer wrote:
On 11/23/15 7:29 PM, Ali Çehreli wrote:
On 11/23/2015 04:03 PM, Steven Schveighoffer wrote:
> On 11/23/15 4:29 PM, Jon D wrote:
>> In the example I gave, what I was really wondering was if
there is a
>> difference
On Monday, 23 November 2015 at 15:19:08 UTC, Steven Schveighoffer
wrote:
On 11/21/15 10:19 PM, Jon D wrote:
On Sunday, 22 November 2015 at 00:31:53 UTC, Jonathan M Davis
wrote:
Honestly, arrays suck as output ranges. They don't get
appended to;
they get filled, and for better or worse, the
My underlying question is how to compose functions taking
functions as arguments, while allowing the caller the flexibility
to pass either a function or delegate.
Simply declaring an argument as either a function or delegate
seems to prohibit the other. Overloading works. Are there better
On Sunday, 17 January 2016 at 06:49:23 UTC, rsw0x wrote:
On Sunday, 17 January 2016 at 06:27:41 UTC, Jon D wrote:
My underlying question is how to compose functions taking
functions as arguments, while allowing the caller the
flexibility to pass either a function or delegate.
[...]
On Thursday, 21 January 2016 at 22:20:28 UTC, H. S. Teoh wrote:
On Thu, Jan 21, 2016 at 10:09:24PM +, Jon D via
Digitalmars-d-learn wrote: [...]
FWIW - I've been implementing a few programs manipulating
delimited files, e.g. tab-delimited. Simpler than CSV files
because
On Thursday, 21 January 2016 at 09:39:30 UTC, data pulverizer
wrote:
I have been reading large text files with D's csv file reader
and have found it slow compared to R's read.table function
which is not known to be particularly fast.
FWIW - I've been implementing a few programs manipulating
I'm trying to identify the preferred ways to lower case a string.
In std.uni there are two functions that return the lower case
form of a string: toLower() and asLowerCase(). There is also
toLowerInPlace().
I'm having trouble figuring out what the relationship is between
these, and when to
On Sunday, 24 January 2016 at 21:04:46 UTC, Adam D. Ruppe wrote:
On Sunday, 24 January 2016 at 20:56:20 UTC, Jon D wrote:
I'm trying to identify the preferred ways to lower case a
string. In std.uni there are two functions that return the
lower case form of a string: toLower() and
Is there a way to reserve capacity in associative arrays? In some
programs I've been writing I've been getting reasonable
performance up to about 10 million entries, but beyond that
performance is impacted considerably (say, 30 million or 50
million entries). GC stats (via the
On Monday, 15 February 2016 at 05:29:23 UTC, sigod wrote:
On Monday, 15 February 2016 at 03:22:44 UTC, Jon D wrote:
Is there a way to reserve capacity in associative arrays?
[snip]
Maybe try using this: http://code.dlang.org/packages/aammm
Thanks, I wasn't aware of this package. I'll give
On Tuesday, 16 February 2016 at 17:05:11 UTC, Basile B. wrote:
On Tuesday, 16 February 2016 at 16:37:07 UTC, Steven
Schveighoffer wrote:
There is not a public way to access these methods
unfortunately.
It would be a good addition to druntime I believe.
-Steve
After reading the topic i've
On Tuesday, 16 February 2016 at 16:37:07 UTC, Steven
Schveighoffer wrote:
On 2/14/16 10:22 PM, Jon D wrote:
Is there a way to reserve capacity in associative arrays?
[snip]
The underlying implementation of associative arrays
appears to take an initial number of buckets, and there's
a private
On Tuesday, 16 February 2016 at 19:49:55 UTC, H. S. Teoh wrote:
On Tue, Feb 16, 2016 at 07:34:07PM +, Jon D via
Digitalmars-d-learn wrote:
On Tuesday, 16 February 2016 at 16:37:07 UTC, Steven
Schveighoffer wrote:
>On 2/14/16 10:22 PM, Jon D wrote:
>>Is there a way to reserve
On Tuesday, 16 February 2016 at 16:27:27 UTC, bachmeier wrote:
On Monday, 15 February 2016 at 11:09:10 UTC, data pulverizer
wrote:
As an alternative are there plans for parallel/cluster
computing frameworks for D?
You can use MPI:
https://github.com/DlangScience/OpenMPI
FWIW, I'm
On Wednesday, 17 February 2016 at 02:32:01 UTC, bachmeier wrote:
You can discuss here, but there is also a gitter room
https://gitter.im/DlangScience/public
Also, I've got a project that embeds R inside D
http://lancebachmeier.com/rdlang/
It's not quite as good a user experience as others
On Saturday, 20 February 2016 at 05:34:01 UTC, tcak wrote:
On Saturday, 20 February 2016 at 05:33:00 UTC, tcak wrote:
Is there any way (I checked core.memory already) to collect
report about memory usage from garbage collector? So, I can
see a list of pointer and length information. Since
On Saturday, 30 April 2016 at 19:21:30 UTC, ag0aep6g wrote:
On 30.04.2016 21:08, Jon D wrote:
If an initial step is to fix the documentation, it would be
helpful to
include specifically that it doesn't work with characters.
It's not
obvious that characters don't meet the requirement.
On Saturday, 30 April 2016 at 18:32:32 UTC, ag0aep6g wrote:
On 30.04.2016 18:44, TheGag96 wrote:
I was just writing some code trying to remove a value from a
character
array, but the compiler complained "No overload matches for
remove", and
if I specifically say use std.algorithm.remove() the
On Wednesday, 11 May 2016 at 18:41:47 UTC, xtreak wrote:
Hi,
I am a D newbie. I worked through D programming language and
programming in D books. I primarily use Python daily. I will be
happy to know how I can go to intermediate level in D. It will
be hepful to have projects in D of high
On Monday, 18 April 2016 at 11:47:42 UTC, Dicebot wrote:
On Monday, 18 April 2016 at 04:25:25 UTC, Jon D wrote:
I have an dub config file specifying a targetType of
'executable'. There is only one file, the file containing
main(), and no unit tests.
When I run 'dub test', dub builds and runs
Is there a way to specify a minimum Phobos version in a dub
package specification?
--Jon
I have an dub config file specifying a targetType of
'executable'. There is only one file, the file containing main(),
and no unit tests.
When I run 'dub test', dub builds and runs the executable. This
is not really desirable. Is there a way to set up the dub
configuration file to disable
On Monday, 18 April 2016 at 05:30:21 UTC, Jonathan M Davis wrote:
On Monday, April 18, 2016 04:25:25 Jon D via
Digitalmars-d-learn wrote:
I have an dub config file specifying a targetType of
'executable'. There is only one file, the file containing
main(), and no unit tests.
When I run 'dub
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