Re: How can I use heapify in @safe code?
On Saturday, 1 October 2016 at 16:59:18 UTC, Burt wrote:
Hi,
I'd like to use a binary heap from @safe code. I thought @safe
is transitive
It tries too but "heapify" uses the struct "BinaryHeap" that is
not safe at all.
(either not annotated or @safe not applicable because of what it
uses in intern: @system stuff)
but the following example does not compile:
import std.container.binaryheap;
@safe // This makes things fail.
unittest
{
// Test range interface.
import std.algorithm.comparison : equal;
int[] a = [4, 1, 3, 2, 16, 9, 10, 14, 8, 7];
auto h = heapify(a);
assert(h.equal([16, 14, 10, 9, 8, 7, 4, 3, 2, 1]));
}
Is there a way to @safely call heapify? How?
No easy "good" way:
1. BinaryHeap is an old container
2. It would require to patch the standard library. So virtually
not available before weeks (but after a quick look it doesn't
seem possible)
There's an easy "bad" way:
import std.container.binaryheap;
@safe // This makes things fail.
unittest
{
void foo() @trusted
{
import std.algorithm.comparison : equal;
int[] a = [4, 1, 3, 2, 16, 9, 10, 14, 8, 7];
auto h = heapify(a);
assert(h.equal([16, 14, 10, 9, 8, 7, 4, 3, 2, 1]));
}
}
but "bad", don't forget ;)
It's a complete cheat to trust here.
Re: Critque of Rust's collection types
On Wednesday, 14 September 2016 at 03:49:35 UTC, Basile B. wrote: On Wednesday, 14 September 2016 at 00:36:39 UTC, Walter Bright wrote: On 9/13/2016 4:47 PM, Walter Bright wrote: http://ticki.github.io/blog/horrible/ Some worthwhile insights into what makes a good collection type. https://news.ycombinator.com/item?id=12488233 Of particular interest is the advocacy of collision attack resistance. Is anyone interested in exploring this w.r.t. D's builtin hashes? https://www.reddit.com/r/rust/comments/52grcl/rusts_stdcollections_is_absolutely_horrible/ Of interest are the comments by the implementer of the hash. There's a benchmark of languages builtin hashmaps here: http://vaskir.blogspot.fr/2016/05/hash-maps-rust-vs-f.html It includes D and Rust. The author found that D wins for the lookups but was a bit behind for the insertions (due to GC maybe ?). Rust results didn't seem that bad, despite of the cryptographic hash function it uses. just ignore...get on ignoring. tea vs coffee...cough
Re: What is the most stable D compiler
On Wednesday, 14 September 2016 at 11:52:00 UTC, Klmp wrote: On Wednesday, 14 September 2016 at 11:34:22 UTC, eugene wrote: What is the most reliable D compiler: dmd, ldc, gdc? because it's slightly before DMD the answer is: LDC. I meant slightly "behind", "before" is not appropriated. i understand the misunderstanding in the following comments. I meant that for LDC being just one step behind is an asset because there's always a risk of regression in DMD. GDC is too far behind DMD is at the front LDC has most of the DMD fixes but sometimes without the regressions coming from the front.
Re: What is the most stable D compiler
On Wednesday, 14 September 2016 at 11:34:22 UTC, eugene wrote: What is the most reliable D compiler: dmd, ldc, gdc? because it's slightly before DMD the answer is: LDC. GDC is too far behind DMD is at the front LDC has most of the DMD fixes but sometimes without the regressions coming from the front.
Re: Beta D 2.071.0-b1
On Friday, 25 March 2016 at 02:20:53 UTC, Anon wrote: On Friday, 25 March 2016 at 00:55:53 UTC, deadalnix wrote: Unrelated to what ? It is a type system breaking bug, I think it is worth merging. Unrelated to D? Double check your link. I don't think Martin can do anything about that pull request. I think he uses a NG client to post. He hasn't realized he's posted on dlang.org ! That's funny.
Re: DlangUI project update
On Friday, 26 December 2014 at 12:33:04 UTC, Vadim Lopatin wrote: Hello! DlangUI project is alive and under active development. https://github.com/buggins/dlangui Recent changes: - new controls: ScrollWidget, TreeView, ComboBox, ... - new dialogs: FileOpenDialog, MessageBox - a lot of bugfixes - performance improvements in software renderer - killer app: new example - Tetris game :) Try Demos: # download sources git clone https://github.com/buggins/dlangui.git cd dlangui # example 1 - demo for most of widgets dub run dlangui:example1 --build=release # tetris - demo for game development dub run dlangui:tetris --build=release DlangUI is cross-platform GUI library written in D. Main features: - cross platform: uses SDL for linux/macos, Win32 API or SDL for Windows - hardware acceleration: uses OpenGL for drawing when built with version USE_OPENGL - easy to extend: since it's native D library, you can add your own widgets and extend functionality - Unicode and internationalization support - easy to customize UI - look and feel can be changed using themes and styles - API is a bit similar to Android - two phase layout, styles Screenshots (a bit outdated): http://buggins.github.io/dlangui/screenshots.html See project page for details. I would like to get any feedback. Will be glad to see advises, bug reports, feature requests. Best regards, Vadim Great work. I left the idea to make GUI apps with D since a while but your project almost conviced me to give another try. I don't like the other options (GtkD, the other based on java things, the one based on tcl). It looks like the native GUI framework a lot of people are expecting. DQuick had my interest too but it seems that it's dormant since a small year now.
