Re: Example for Mir-Random fails
On Saturday, 3 April 2021 at 20:55:40 UTC, Preetpal wrote: On Saturday, 3 April 2021 at 19:02:34 UTC, Brad wrote: Obviously it is a type mismatch - I have tried using to!uint to convert the result from unpredictableSeed to a type that will match - but that just causes more errors. Thank you in advance. I was able to compile the sample without any issue and it was able to run. Can you give more information about your environment and possibly create a minimal example that re-creates the issue like in a Github repository? I figured out that I had not purged all the Phobos random imports from my code and the issue was related to the two libraries not playing well together. It is working now. Interestingly though - the example code will not compile in the D Playground. I am not going to worry about that. It is working for me now. Thanks
Re: Example for Mir-Random fails
On Saturday, 3 April 2021 at 22:04:33 UTC, Bastiaan Veelo wrote: On Saturday, 3 April 2021 at 19:02:34 UTC, Brad wrote: I just do not know enough about the D libraries to figure out what is wrong. I know it is a case of type mismatch. The example appears on the Mir-Random page as listed under DUB: https://code.dlang.org/packages/mir-random [...] I think you are seeing conflicts between Phobos and Mir: they both provide unpredictableSeed and Random. If you want to use the ones from Mir, be sure to not import std or std.random, or use fully qualified names. — Bastiaan. You nailed it. I just now figured that out. It never ceases to amaze me how much time can my lost to a simple mistake like that. Thank you.
Example for Mir-Random fails
I just do not know enough about the D libraries to figure out
what is wrong. I know it is a case of type mismatch. The
example appears on the Mir-Random page as listed under DUB:
https://code.dlang.org/packages/mir-random
The code looks like this:
```d
void main()
{
import mir.random;
import mir.random.variable: normalVar;
import mir.random.algorithm: randomSlice;
// Engines are allocated on stack or global
auto rng = Random(unpredictableSeed);
auto sample = rng.randomSlice(normalVar, 10);
import std.stdio;
sample[rng.randIndex($)].writeln;
}
```
This is the error I am seeing (I slapped the sample code into
another program that flips a coin... It compiles file without the
sample code):
```d
source\flipcoin.d(39,20): Error: constructor
`std.random.MersenneTwisterEngine!(uint, 32LU, 624LU, 397LU,
31LU, 2567483615u, 11LU, 4294967295u, 7LU, 2636928640u, 15LU,
4022730752u, 18LU, 1812433253u).MersenneTwisterEngine.this(uint
value)` is not callable using argument types `(ulong)`
source\flipcoin.d(39,20):cannot pass argument
`unpredictableSeed()` of type `ulong` to parameter `uint value`
```
Obviously it is a type mismatch - I have tried using to!uint to
convert the result from unpredictableSeed to a type that will
match - but that just causes more errors.
Thank you in advance.
Creating a .di file for a custom C library
I would like to use an updated version of the Termbox library (written in C) with D. I have the .h file. This is new territory for me (why try something easy - right?). I think I need to create a .di file that corresponds to the .h file. I also suspect that I need to put the library file (C code) into the project as a file somehow. I am probably just not looking in the right place for the documentation, but I cannot seem to find a lot of guidance in this area. Thanks in advance.
Re: Windows Console and writing Unicode characters
On Monday, 29 March 2021 at 11:53:32 UTC, Adam D. Ruppe wrote:
On Monday, 29 March 2021 at 02:12:57 UTC, Brad wrote:
[...]
You can still import std.stdio and use other functions with
just the one overridden.
D handles name lookups by just ... well, looking up lol. It
starts in the current scope, then checks the next one up until
the module, then starts looking at imported modules for the
name.
If there's two with the same name, it prefers the most local
one, but you can override that by using the full name:
import std.stdio;
void writeln() {}
writeln(); // since you have a local name, it uses that first
getc(); // no local name, so it checks the imported modules
std.stdio.writeln(); // specifically uses the one from the
module
Perfect. Thank you Adam.
Windows Console and writing Unicode characters
I am new here so I will post this in Learn. I have been doing a bit of reading on printing unicode characters in the Windows Console. Specifically W10 command prompt. I ran across a post by Adam Ruppe in a thread created a couple years ago which links a short bit of code and a quick discussion that Adam presents on his blog. Here is a link to the specific reply I refer to: https://forum.dlang.org/post/sjsqqhwvlonohvwyq...@forum.dlang.org Which points to his Blog post here: http://dpldocs.info/this-week-in-d/Blog.Posted_2019_11_25.html#unicode The code snippet works great and does exactly what I want it to do. I am just curious - since it works by basically providing a custom implementation for writeln rather than use the one in stdout module (package?) that would mean any other functions from that package I would want to leverage I would need to include by name. Would it be acceptable then to maybe rename the custom writeln functions in my own code to something like uniwriteln and then include the standard library for other functions I might want to use? I am guessing this is not a problem, although I found the code a little intimidating and was not sure I wanted to play fast and lose with it... Thanks
Immutable
I was looking through lots of sample code on Rosetta Code. D has a lot of solutions out there. That is really nice but it has me wondering - coming from other languages that do not support the concept of immutability - do real world programmers and/or hobbyists really use it as much as I see it on Rosetta Code? I know it adds a layer of security to your code, but I am still thinking "why?". Thanks for entertaining a newbie question.
