Re: Help with Ranges
On Monday, 27 July 2020 at 18:15:26 UTC, Steven Schveighoffer wrote: On 7/27/20 1:10 PM, Charles wrote: [...] Let's talk about a concrete example, so you can see why: int[] arr = [21, 83, 45, 60]; [...] I had very incorrect model of how ranges function, and after reading your post along with map's source, I think I know how to proceed from here. I really appreciate your patience, and next time I'll clearly explain my constraints. Thank you, gentlemen.
Re: Help with Ranges
On Monday, 27 July 2020 at 16:52:51 UTC, H. S. Teoh wrote: On Sun, Jul 26, 2020 at 07:10:41AM +, Charles via Digitalmars-d-learn wrote: Suppose I have the following line of code where arr is an array, doSomething is some predicate that does a lot of processing on each element, sort must come after the mapping, and there are more operations done to the range after sort: arr.map!doSomething.sort. ...; [...] As Steven said, you cannot sort a range that doesn't support swapping elements, and most ranges cannot unless they're backed by actual storage, like an array. (*Something* has got to keep track of where the elements are, after all.) But in my example, isn't the output of map backed by actual storage? After all, it's taking in an array. In this particular case, though, if the contents of your original doesn't need to be preserved, perhaps .schwartzSort might be what you're looking for? If you cannot modify the original array for whatever reason, then an allocation is probably unavoidable -- either you'll have to create an array of your mapped elements, or you could create an index and sort that instead (see .makeIndex or std.range.zip for different approaches). T I'll take a look at both of these, since I need to be aware of both cases. I'm trying to find the most efficient way of building a pipeline for my own betterment. Thank you.
Re: Help with Ranges
On Sunday, 26 July 2020 at 14:56:35 UTC, Steven Schveighoffer
wrote:
A map that returns an lvalue would be sortable, but you would
be sorting the processed elements, and probably not the
original elements.
Indeed, but that's what I want: sort the process elements.
Otherwise, I'd place sort before the transformations.
I have found this handy tool quite useful in my code where I
need a temporary array:
// creates a concrete range (std.container.array.Array range)
out of the
// original range that is eagerly fetched, and then can be
processed, without
// allocating extra garbage on the heap.
auto concreteRange(Range)(Range r)
{
import std.range : ElementType;
import std.container.array : Array;
return Array!(ElementType!Range)(r)[];
}
Slicing an Array will keep the reference count correctly, and
destroy the memory automatically after you're done using it. So
it's perfect for temporary arrays in pipelining.
-Steve
This works well, and it's rather nifty. Still, I'm confused
since, as far as I know, map wraps its source, i.e. the array in
this case, which is sortable. It seems to me the only reason I
can't sort MapResult is because it doesn't have the proper
interface.
I'm obviously missing something.
Help with Ranges
Suppose I have the following line of code where arr is an array, doSomething is some predicate that does a lot of processing on each element, sort must come after the mapping, and there are more operations done to the range after sort: arr.map!doSomething.sort. ...; Sort fails to instantiate because the range it's receiving doesn't support element swapping. This may and might be resolved by calling array: arr.map!doSomething.array.sort. ...; However, this might trigger an allocation, and there's still more to do! Is there something I'm missing with regards to ranges that could help me make the first line work without using array, or is it more of an issue with my code's design?
Re: Setup help?
On Thursday, 7 February 2019 at 02:55:15 UTC, evilrat wrote: You need C++ tools from Microsoft to debug D code, don't mind the name, its debugger works for any (compatible formats) native code. Then add C++ Windows debug configuration and set your paths. Done. You can debug now. (Though it is possible that it will require Visual Studio Build Tools installation) Of course this will not work for default DMD builds because it is using ancient object files format that is not compatible with VS debugger engine, so using DMD you need to build with -m32mscoff (dub --arch=x86_mscoff) or -m64 (dub --arch=x86_64) flags. Thanks, I'll give it a shot.
Setup help?
Does anyone know of a video that shows setting up vscode (or another editor with debugging support)? I always feel like I miss a step when I decide to try D out again, and it never ends well. I don't use C++, and I do use Windows, which has me wondering if I'm just missing some normal/exepcted configuration. My most recent attempt I tried to get Native Debug to make VS Code debugging stop on the first line. Instead, it just runs the program, and exits. Debug console output: No symbol table is loaded. Use the "file" command. Running executable [New Thread 10256.0x23d8] [New Thread 10256.0x2d30] [New Thread 10256.0xebc] [New Thread 10256.0x19f4] Edit source/app.d to start your project. [Thread 10256.0xebc exited with code 0] [Thread 10256.0x2d30 exited with code 0] [Thread 10256.0x19f4 exited with code 0] Thanks
Re: In language tooling
On Wednesday, 2 March 2016 at 03:41:57 UTC, sigod wrote: Very interesting. I wonder what Walter would say about it. Yeah, I'm curious what others' thoughts on it are for sure.
In language tooling
Watched a video on Jonathan Blow's language that he's developing, and he has a pretty neat idea of having tools being part of the language. Looking at the first 15 minutes(https://www.youtube.com/watch?v=OHZwYYW9koI) or so of the video, is this something that could be accomplished in D with CTFE? I think he makes a decent case for whether or not it'd be useful.
Re: Is this a good singleton?
On Saturday, 13 February 2016 at 19:32:33 UTC, Ali Çehreli wrote: David Simcha's DConf 2013 presentation has a singleton implementation at 27:55: https://www.youtube.com/watch?v=yMNMV9JlkcQ Ali Neat video! Watched the singleton section to end up watching the rest of the video. Anything every come of the std.patterns idea?
Re: Questions about vibe.d
On Friday, 12 February 2016 at 12:31:57 UTC, Guillaume Piolat wrote: 1. Can vibe.d handle HTTPS connections? 2. Can vibe.d "rewrite" HTTP connections to HTTPS? 3. Can vibe.d be put behind a nginx reverse proxy? 4. Can vibe.d send mails? 1. Yes. Example: https://github.com/rejectedsoftware/vibe.d/tree/master/examples/https_server 2. I'd do this with nginx. Example: http://serverfault.com/a/337893 3. Yes. 4. Yes. Example: https://github.com/rejectedsoftware/vibe.d/tree/master/examples/sendmail Sorry if these questions are a bit basic, the implied subtext is "and does it work well?". Yes, also Sönke actively works one Vibe almost (if not) every single day, so it's also exceptionally well maintained.
Re: Questions about vibe.d
On Friday, 12 February 2016 at 14:36:18 UTC, Ola Fosheim Grøstad wrote: On Friday, 12 February 2016 at 12:31:57 UTC, Guillaume Piolat wrote: Sorry if these questions are a bit basic, the implied subtext is "and does it work well?". Just in case you didn't know, browsers now support HTTP/2 (and SPDY)... https://en.wikipedia.org/wiki/HTTP/2 Vibe.d doesn't though. There's a branch for it here: https://github.com/rejectedsoftware/vibe.d/tree/http2-botan-cleanup, but it still has a good bit of work.
algorithm's .filter!() by range key
This seems to be true of any range function really... is there a way to access the key within my range? Example of what I want to do: auto x = [1,2,3,4,5]; x.filter( x_key % 2 == 1 ).sum(); // sum odd elements in array
Re: algorithm's .filter!() by range key
On Tuesday, 9 February 2016 at 20:44:34 UTC, cym13 wrote: On Tuesday, 9 February 2016 at 20:40:44 UTC, Charles wrote: This seems to be true of any range function really... is there a way to access the key within my range? Example of what I want to do: auto x = [1,2,3,4,5]; x.filter( x_key % 2 == 1 ).sum(); // sum odd elements in array x.filter!(x_key => x_key % 2 == 1).sum(); Oh man, I really messed up my example, and did a poor one at that. Better example: auto x = [2,4,6,8,10]; x.filter( x_key => x_key % 2 == 1 ).sum(); // sums 2 + 6 + 10 == 18
Re: algorithm's .filter!() by range key
On Tuesday, 9 February 2016 at 20:48:01 UTC, Steven Schveighoffer wrote: On 2/9/16 3:40 PM, Charles wrote: This seems to be true of any range function really... is there a way to access the key within my range? Example of what I want to do: auto x = [1,2,3,4,5]; x.filter( x_key % 2 == 1 ).sum(); // sum odd elements in array An array is not an indexed range. It only works with foreach by key because of special foreach behavior. What you want is std.range.enumerate Exactly! Thanks! Interestingly, hackerrank doesn't seem to have it. They're using 2.067.0-b1 on Ubuntu 14.04.
Re: Build utf.d with MS-COFF failed
On Friday, 20 November 2015 at 21:27:12 UTC, Pierre wrote: Hello, I can't build my project with MS-COFF option. I'm using DMD 2.069. I got this error : utf.d(1109) : invalid UTF-8 sequence (at index 1) I used these options with visual D: Compiler : DMD D-Version : D2 Output Type: DLL Subsystem : Not set Compilation: Combined compile and link Thank you for your help. What string is throwing the error? I've had that error when I was trying to decode windows1252 strings.
Am I using std.encoding correctly?
I have some binary files that I'm reading. At compile time it's
unknown what types I'm reading, and if they're strings, how it's
encoded.
I'm doing something like this:
Variant value;
switch(type)
{
...
case Type.STRING:
value = cast(dchar[])[];
const(ubyte)[] buffer = raw[0 .. length];
while (buffer.length > 0)
value ~= encodingScheme.decode(buffer);
break;
...
}
I know there's safeDecode, but I'm also fairly confident that all
strings can decode safely, already, and if it isn't I'd want an
exception thrown from it.
Is this correct usage? I guess I was a little surprised there was
no decodeString that basically did this.
Re: question about using std.bitmanip.read
On Saturday, 7 November 2015 at 04:25:00 UTC, Mike Parker wrote: Missed this in my previous reply. No problem. I appreciate you taking the time to help me either way :)
Re: question about using std.bitmanip.read
On Saturday, 7 November 2015 at 03:53:14 UTC, Nicholas Wilson
wrote:
On Saturday, 7 November 2015 at 03:19:44 UTC, Charles wrote:
Hi guys,
It's me again... still having some issues pop up getting
started, but I remain hopeful I'll stop needing to ask so many
questions soon.
I'm trying to use std.bitmanip.read; however, am having some
issues using it. For basic testing I'm just trying to use:
read!double(endianess, ubyteArr).writeln;
endianess is an Endian from std.system, and ubyteArr is an 8
byte ubyte[].
When I run this I get:
Error: template std.bitmanip.read cannot deduce function from
argument types !(double)(Endian, ubyte[]), candidates are:
std.bitmanip.read(T, Endian endianness = Endian.bigEndian,
R)(ref R range) if (canSwapEndianness!T && isInputRange!R &&
is(ElementType!R : const(ubyte)))
dmd failed with exit code 1.
Clearly that didn't work, so I tried excluding the endianess:
read!double(ubyteArr).writeln;
and that does work! But its the wrong byte order, so its
incorrect anyways.
I went to std.bitmanip to look for unittests using the Endian,
and the only one that does uses read!(T, endianness), which
needs endianness to be known at compile time, which I don't
have.
Any suggestions?
Cheat!
T read(T,R)(Endian endianness , R r)
{
if(endianness == Endian.bigEndian)
return
std.bitmanip.read!(T,Endian.bigEndian,R)(r);
else if (endianness == Endian.littleEndian)
return
std.bitmanip.read!(T,Endian.littleEndian,R)(r);
}
Thanks!
but...
you are on a little endian system (bigEndian gave wrong byte
order )
The actual use case is reading a binary file of unknown
endianness. I don't think I'm that fortunate sadly.
question about using std.bitmanip.read
Hi guys, It's me again... still having some issues pop up getting started, but I remain hopeful I'll stop needing to ask so many questions soon. I'm trying to use std.bitmanip.read; however, am having some issues using it. For basic testing I'm just trying to use: read!double(endianess, ubyteArr).writeln; endianess is an Endian from std.system, and ubyteArr is an 8 byte ubyte[]. When I run this I get: Error: template std.bitmanip.read cannot deduce function from argument types !(double)(Endian, ubyte[]), candidates are: std.bitmanip.read(T, Endian endianness = Endian.bigEndian, R)(ref R range) if (canSwapEndianness!T && isInputRange!R && is(ElementType!R : const(ubyte))) dmd failed with exit code 1. Clearly that didn't work, so I tried excluding the endianess: read!double(ubyteArr).writeln; and that does work! But its the wrong byte order, so its incorrect anyways. I went to std.bitmanip to look for unittests using the Endian, and the only one that does uses read!(T, endianness), which needs endianness to be known at compile time, which I don't have. Any suggestions?
Re: Unittest in a library
On Friday, 6 November 2015 at 04:34:28 UTC, TheFlyingFiddle wrote:
On Friday, 6 November 2015 at 03:59:07 UTC, Charles wrote:
Is it possible to have unittest blocks if I'm compiling a
library?
I've tried having this:
test.d:
class Classy {
unittest { assert(0, "failed test"); }
}
and then build it with `dmd test.d -lib -unittest` and it
doesn't fail the unittest.
You can test the unittests by using the -main switch.
http://dlang.org/dmd-linux.html#switch-main
That's exactly what I was missing. Thanks!
Unittest in a library
Is it possible to have unittest blocks if I'm compiling a library?
I've tried having this:
test.d:
class Classy {
unittest { assert(0, "failed test"); }
}
and then build it with `dmd test.d -lib -unittest` and it doesn't
fail the unittest.
Re: ODBC Library?
On Monday, 10 November 2014 at 20:37:51 UTC, Charles wrote: For anyone in the future: I needed odbc32.lib, so I created the following odbc32.def and used implib. Thanks me. My computer I was using recently died, and ran into this problem again when getting everything set up. Is there any way to just fix this issue altogether?
What's the "right" way to do openmp-style parallelism?
Friends,
I have a program that would be pretty easy to parallelize with an
openmp pragra in C. I'd like to avoid the performance cost of
using message passing, and the shared qualifier seems like it's
enforcing guarantees I don't need. Essentially, I have
x = float[imax][jmax]; //x is about 8 GB of floats
for(j = 0; j < jmax; j++){
//create some local variables.
for(i = 0; i < imax; i++){
x[j][i] = complicatedFunction(i, x[j-1], other, local,
variables);
}
}
In C, I'd just stick a #pragma omp parallel for around the inner
loop (since the outer loop obviously can't be parallelized).
How should I go about this in D? I want to avoid copying data
around if it's possible since these arrays are huge.
Cheers,
Charles.
Re: Win32 bindings
http://www.dsource.org/projects/bindings/wiki/WindowsApi Thanks for this! I guess my brain was wrong thinking it'd be in http://code.dlang.org if it was still being maintained. For some functions, you'll need import libraries. You can get them from the same project as in the above link, create your own from .def files, or use implib/coffimplib. Are the default libraries in dmd2\windows\lib not current or something?
Win32 bindings
Hi guys, What is the best (and/or official) source for win32 bindings? I know there's this github project: https://github.com/AndrejMitrovic/DWinProgramming; however, it hasn't been touched in about 2 years. It's currently linked on the wiki (http://wiki.dlang.org/D_for_Win32). I'm also aware that there's core.sys.windows.windows, but the documentation for this page is less than helpful: http://dlang.org/library/core/sys/windows/windows.html. It also seems to be missing portions of it that'd be useful (see github here: https://github.com/D-Programming-Language/druntime/tree/master/src/core/sys/windows). So, perhaps, a better question is what do you use for win32 bindings? Are there any additional dependencies when building apps with either of these (beyond something like user32.dll for example)? Thanks, Charles
Re: curl password issue
On Tuesday, 24 February 2015 at 00:20:45 UTC, Martin Nowak wrote: On Monday, 23 February 2015 at 16:10:42 UTC, Andre wrote: Curl has some issues with passwords containing special characters like the hash key (#). I don't found any reference for this issue in curl and the D wrapper hardly adds anything. You're sure it isn't an issue with your program or how you pass the password? This might be the case here. I was recently dealing with this and I had to percent encode the hash key (%23 for reference). Also, I ran into issues regarding the http_proxy and https_proxy environment variables, but again those are unrelated to curl.d.
Re: vibe-d basic build errors
On Friday, 20 February 2015 at 14:36:47 UTC, MartinNowak wrote: On Friday, 20 February 2015 at 04:48:09 UTC, Charles wrote: They're installer versions, dub is 0.9.22 Nov 22 I want to say, and DMD is 2.066.1 Same ones I tried. With --force dmd seems to fail but there is not output. Can you run only the link command with a -v to get verbose dmd output? dmd -c -of.dub\build\application-debug-windows-x86-dmd_2066-7FF336D92D4F5796EA8623FC9A6A9B90\web.obj -debug -g -w -version=VibeDefaultMain -version=VibeWin32Driver -version=Have_web -version=Have_vibe_d -version=Have_openssl -Isource -IC:\Users\Charles\AppData\Roaming\dub\packages\vibe-d-0.7.22\source -IC:\Users\Charles\AppData\Roaming\dub\packages\openssl-1.1.3_1.0.1g -Jviews source\app.d C:\Users\Charles\AppData\Roaming\dub\packages\vibe-d-0.7.22\source\vibe\appmain.d Thanks for the help with this. The link command ran without error, and it's output is here: http://pastebin.com/eqT4vst6 To be exact, the command I ran was this: dmd -v -c -of.dub\build\application-debug-windows-x86-dmd_2066-7FF336D92D4F5796EA8623FC9A6A9B90\web.obj -debuenssl -Isource -IC:\Users\Charles\AppData\Roaming\dub\packages\vibe-d-0.7.22\source -IC:\Users\Charles\AppData\-d-0.7.22\source\vibe\appmain.d %userprofile%\Desktop\output.txt It didn't produce any errors as far as I can tell, but I'm not sure how to tell what the mangled function names are. Sorry about the delay in getting back to you on this. Charles
Re: vibe-d basic build errors
On Friday, 20 February 2015 at 02:55:32 UTC, MartinNowak wrote: On Friday, 20 February 2015 at 02:50:05 UTC, Charles wrote: Pastebin of dub --vverbose: http://pastebin.com/4BcHJM74 Target vibe-d 0.7.22 is up to date. Use --force to rebuild. Have you tried the --force switch to rebuild vibe.d? Looks like the existing vibe.d lib was build against a different build of druntime. Yes, I have. Here's a pastebin with --force --vverbose: http://pastebin.com/qZEKUN46
Re: vibe-d basic build errors
On Friday, 20 February 2015 at 04:13:08 UTC, MartinNowak wrote: On Friday, 20 February 2015 at 04:00:21 UTC, Charles wrote: Yes, I have. Here's a pastebin with --force --vverbose: http://pastebin.com/qZEKUN46 Just tried the dub init web vibe.d cd web dub thing, works for me. So the most interesting questions. - What version of dub and dmd are you using? - Are those installer versions or did you build anything yourself? They're installer versions, dub is 0.9.22 Nov 22 I want to say, and DMD is 2.066.1
vibe-d basic build errors
Hi,
I'm trying to follow the instructions for vibe-d with:
dub init web vibe.d
cd web
dub
and then add the line subConfigurations: {vibe-d: win32}
to the dub.json file.
This however is producing errors during linking. Could I get a
hand?
Pastebin of dub --vverbose: http://pastebin.com/4BcHJM74
Thanks,
Charles
Re: Issue with template function
On Friday, 6 February 2015 at 17:40:31 UTC, ketmar wrote: On Fri, 06 Feb 2015 17:09:28 +, Charles wrote: readString(toBytes!string(test),0,4).writeln; if you'll take a look into druntime sources, you'll find that string is just an alias to `immutable(char)[]`. so you actually doing thing: readString(toBytes!(immutable(char)[])(test),0,4).writeln; i bet that this is not what you meant. ;-) Thanks!
Re: Issue with template function
On Saturday, 7 February 2015 at 12:04:12 UTC, Nicholas Wilson
wrote:
Are you wanting to to convert each element in arr to a byte
thus truncating and losing data (when T.sizeof != 1)?
as in
toBytes([1,2,3, 42, 500 /*this will be truncated to 244
*/]);// T == int here
or are you wanting to convert each element to a ubyte array and
then concatenate it to the result.
as is
ubyte[] toBytes(T)(T[] arr)
{
ubyte[T.sizeof] buf;
if (arr is null)
{
return null;
}
ubyte[] result = new ubyte[arr.length * T.sizeof];
foreach (i, val; arr)
{
buf[] = cast(ubyte[T.sizeof])(arr[i])[0 ..
T.sizeof]
result ~= buf;
}
return result;
}
?
The original code I was using was written in Java, and only had a
method for strings. This is closer to what I wanted. My unit
tests were just going back and forth with readString function, so
I was completely missing this for other types. Nice catch!
There were a couple issues with your code so I've included the
corrected version:
ubyte[] toUbytes(T)(T[] arr)
{
if (arr is null)
{
return null;
}
ubyte[T.sizeof] buffer;
ubyte[] result = new ubyte[arr.length * T.sizeof];
foreach (i, val; arr)
{
buffer[] = cast(ubyte[T.sizeof])((arr[i]))[0 ..
T.sizeof]; // Parenthesis and missing semicolon
result[i * T.sizeof .. (i * T.sizeof) + T.sizeof] =
buffer; // Specify appropriate slice for buffer to be inserted
into
}
return result;
}
Issue with template function
I'm trying to create a template function that can take in any
type of array and convert it to a ubyte array. I'm not concerned
with endianness at the moment, but I ran into a roadblock when
trying to do this with strings. It already works with ints,
chars, etc.
Here's the relevant test code:
module byteReader;
public import std.system : Endian;
ubyte[] toBytes(T)(T[] arr)
{
if (arr == null)
{
return null;
}
ubyte[] result = new ubyte[arr.length];
foreach (key, val; arr)
{
result[key] = cast(ubyte) val;// This is line 16
}
return result;
}
string readString(ubyte[] buffer, uint offset, uint length)
{
assert( buffer.length = offset + length );
char[] chars = new char[length];
foreach(key, val; buffer[offset .. offset + length])
{
chars[key] = cast(char) val;
}
return cast(string)chars;
}
void main() {
import std.stdio;
readString(toBytes!char(['t','e','s','t']),0,4).writeln;
readString(toBytes!string(test),0,4).writeln;//
This is line 39
}
Here's the output:
byteReader.d(16): Error: cannot cast val of type string to
type ubyte
byteReader.d(39): Error: template instance
byteReader.toBytes!string error instantiating
Re: Issue with template function
Can I not do this cast because it's immutable?
Question about Vectors
So I was reading the documentation page:
http://dlang.org/simd.html and noticed what appears to be a typo:
int4 v;
(cast(int*)v)[3] = 2; // set 3rd element of the 4 int vector
(cast(int[4])v)[3] = 2; // set 3rd element of the 4 int vector
v.array[3] = 2; // set 3rd element of the 4 int vector
v.ptr[3] = 2;// set 3rd element of the 4 int vector
v.array[3] = 2; and v.ptr[3] = 2; set the fourth element, and not
the third.
As I was verifying this, I realized I had to compile it in 64 bit
code. The 32 bit code produced the error SIMD vector types not
supported on this platform.
My test code is:
void main() {
import std.stdio;
import core.simd;
int4 v = 7;
v.ptr[3] = 2;
writeln(v.array[]);
}
Is that related to me compiling while using a 64 bit OS, or is
that true of any 32 bit OS, and thus, vectors can't be used in
programs intended to be run on 32 bit OSs?
Thanks,
Charles
ODBC Library?
Hi guys, I've been looking and haven't found any libraries for ODBC or MSSQL. I saw some for D v1, but nothing for v2. Anyone know of any, or anyone know of a tutorial that I could use to create this myself? Thanks, Charles
Re: ODBC Library?
I kinda slapped one together but idk if it actually works. https://github.com/adamdruppe/arsd database.d and mssql.d from that repo. I haven't even tried to compile it for a while though, so it might not work at all. The way I made it was to write the extern(C) function declarations and then call it like in C. It didn't compile, says, mssql.d(12): Error: module sql is in file 'win32\sql.d' which cannot be read and then lists the import paths, of which none of them have the win32 directory. Database.d was able to compile though. Assuming you're using ODBC on Windows, here's an old port of an even older C++ wrapper I used to use for ODBC work. It includes an ODBC header and library, so should serve as a good basis for whatever you're trying to do. If you're on Unix, you may have to update the ODBC header a bit. I got partway through that project back in the day but never finished: http://invisibleduck.org/sean/tmp/sql.zip I'll look into this, thanks for the example.
Re: ODBC Library?
On Monday, 10 November 2014 at 18:13:58 UTC, Adam D. Ruppe wrote: On Monday, 10 November 2014 at 17:57:21 UTC, Charles wrote: It didn't compile, says, mssql.d(12): Error: module sql is in file 'win32\sql.d' which cannot be read Oh, I forgot I used those. You can download the win32 folder from here https://github.com/AndrejMitrovic/DWinProgramming/tree/master/WindowsAPI The Windows bindings that come with phobos are pathetically incomplete so a separate download or a bunch of copy/pasted declarations is needed for any serious windows api work. Thanks for that. For anyone in the future: I needed odbc32.lib, so I created the following odbc32.def and used implib. LIBRARY odbc32 EXETYPE NT SUBSYSTEM WINDOWS EXPORTS _SQLAllocEnv@4 = SQLAllocEnv _SQLAllocConnect@8 = SQLAllocConnect _SQLAllocHandle@12 = SQLAllocHandle _SQLColAttribute@28 = SQLColAttribute _SQLConnect@28 = SQLConnect _SQLDisconnect@4 = SQLDisconnect _SQLDescribeCol@36 = SQLDescribeCol _SQLDriverConnect@32 = SQLDriverConnect _SQLDrivers@32 = SQLDrivers _SQLDataSources@32 = SQLDataSources _SQLExecDirect@12 = SQLExecDirect _SQLFetch@4 = SQLFetch _SQLFreeConnect@4 = SQLFreeConnect _SQLFreeHandle@8 = SQLFreeHandle _SQLFreeEnv@4 = SQLFreeEnv _SQLEndTran@12 = SQLEndTran _SQLFreeStmt@8 = SQLFreeStmt _SQLGetData@24 = SQLGetData _SQLGetDiagField@28 = SQLGetDiagField _SQLGetDiagRec@32 = SQLGetDiagRec _SQLGetInfo@20 = SQLGetInfo _SQLNumResultCols@8 = SQLNumResultCols _SQLSetConnectOption@12 = SQLSetConnectOption _SQLSetEnvAttr@16 = SQLSetEnvAttr _SQLSetStmtOption@12 = SQLSetStmtOption I've only tested it on a couple select statements and the fieldNames, but so far its working.
Possible difference in compilers?
Hi everyone
So I've been working on the problems over at HackerRank.com
trying to gain some familiarity with D. I use a Windows computer
with VisualD, but the server used to test the program uses Ubuntu
(I can't tell which compiler they're actually using).
The problem I'm stuck on now is the Utopian Tree
(https://www.hackerrank.com/challenges/utopian-tree).
My solution I came up with (and works locally) is:
import std.stdio;
void main() {
int height=1,t=1,oldN=0,n;
readf( %d\n, t);
foreach (i;0 .. t) {
readf( %d\n, n);
foreach (j; oldN .. n)
height = (j % 2) ? height + 1 : height * 2;
writeln(height);
oldN = n;
}
}
For the test cases this only produces the first output
(correctly), but then hits a compiler error with format.d before
the next one. Any ideas what might be going on?
Thanks,
Charles
Re: Possible difference in compilers?
For the test cases this only produces the first output (correctly), but then hits a compiler error with format.d before the next one. Any ideas what might be going on? Figured it out. The issue was the \n character at the end of the readf statements.
