Re: Real simple question... for good programmers
On 10/22/22 5:53 PM, WhatMeWorry wrote:
string[] tokens = userSID.output.split!isWhite;
writeln("tokens = ", tokens);
tokens = ["SID", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"S-1-5-21-3823976785-3597194045-4221507747-1779", "", "", "", "", "",
"", "", ""]
Is there a clever way that I can discard all the extra null strings in
the resultant string array?
I've been playing with isControl, whitespace, etc. Ready to rip my hair
out.
Try just split without the `isWhite`. If you look at the docs, you will see:
"When no delimiter is provided, strings are split into an array of
words, using whitespace as delimiter. Runs of whitespace are merged
together (no empty words are produced)."
-Steve
Re: Real simple question... for good programmers
On Saturday, 22 October 2022 at 21:53:05 UTC, WhatMeWorry wrote:
string[] tokens = userSID.output.split!isWhite;
writeln("tokens = ", tokens);
[...]
Is there a clever way that I can discard all the extra null
strings in the resultant string array?
Easiest way is to use [`filter`][1]. Here's an example:
```d
import std.algorithm: splitter, filter;
import std.uni: isWhite; // or use std.ascii for non-unicode input
import std.array: array;
import std.stdio: writeln;
string exampleText =
"Hello 123-456-ABCx\ny\tz\r\nwvu goodbye";
void main()
{
string[] tokens = exampleText
.splitter!isWhite
.filter!(t => t.length > 0)
.array;
writeln("tokens = ", tokens);
}
```
I've also used the lazily-evaluated [`splitter`][2] instead of
the eagerly-evaluated `split`, to avoid allocating a temporary
array unnecessarily.
[1]:
https://phobos.dpldocs.info/std.algorithm.iteration.filter.html
[2]:
https://phobos.dpldocs.info/std.algorithm.iteration.splitter.3.html
Re: Real simple question... for good programmers
On Saturday, 22 October 2022 at 22:01:09 UTC, Enjoys Math wrote:
On Saturday, 22 October 2022 at 21:53:05 UTC, WhatMeWorry wrote:
string[] tokens = userSID.output.split!isWhite;
writeln("tokens = ", tokens);
tokens = ["SID", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "",
"S-1-5-21-3823976785-3597194045-4221507747-1779", "", "", "",
"", "", "", "", ""]
Is there a clever way that I can discard all the extra null
strings in the resultant string array?
I've been playing with isControl, whitespace, etc. Ready to
rip my hair out.
Why not `strip`? Works on ranges:
https://dlang.org/phobos/std_algorithm_mutation.html#.strip
Strip won't work because it only works on the beginning and ends
of the range. What you want is `remove`. See my other MWE post.
Re: Real simple question... for good programmers
__MWE Code:__
```
module DlangForumsMWE;
import std.stdio;
import std.algorithm.mutation;
int main()
{
//string[] tokens = userSID.output.split!isWhite;
//writeln("tokens = ", tokens);
auto tokens = ["SID", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "",
"", "", "",
"S-1-5-21-3823976785-3597194045-4221507747-1779", "", "", "", "",
"", "", "", ""];
writeln("Before:\n", tokens);
writeln();
tokens = tokens.remove!(x => x == "");
writeln("After:\n", tokens);
readln();
return 0;
}
```
__Outputs:__
```
Before:
["SID", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "S-1-5-21-3823976785-3597194045-4221507747-1779", "", "", "",
"", "", "", "", ""]
After:
["SID", "S-1-5-21-3823976785-3597194045-4221507747-1779"]
```
Re: Real simple question... for good programmers
On 10/22/22 14:53, WhatMeWorry wrote:
>
>
> string[] tokens = userSID.output.split!isWhite;
> writeln("tokens = ", tokens);
Could you please show minimal compilable code that demonstrates the
issue. I spent some time with some guesses but failed (to get my code to
compile with std.array.split).
Ali
P.S. Sorry for also sending email.
Re: Real simple question... for good programmers
On Saturday, 22 October 2022 at 21:53:05 UTC, WhatMeWorry wrote:
string[] tokens = userSID.output.split!isWhite;
writeln("tokens = ", tokens);
tokens = ["SID", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "",
"S-1-5-21-3823976785-3597194045-4221507747-1779", "", "", "",
"", "", "", "", ""]
Is there a clever way that I can discard all the extra null
strings in the resultant string array?
I've been playing with isControl, whitespace, etc. Ready to rip
my hair out.
Why not `strip`? Works on ranges:
https://dlang.org/phobos/std_algorithm_mutation.html#.strip
Real simple question... for good programmers
string[] tokens = userSID.output.split!isWhite;
writeln("tokens = ", tokens);
tokens = ["SID", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "S-1-5-21-3823976785-3597194045-4221507747-1779", "",
"", "", "", "", "", "", ""]
Is there a clever way that I can discard all the extra null
strings in the resultant string array?
I've been playing with isControl, whitespace, etc. Ready to rip
my hair out.
Re: Real Simple Question?
On 10/22/16 5:34 PM, WhatMeWorry wrote: On Saturday, 22 October 2016 at 20:51:14 UTC, Jonathan M Davis wrote: On Saturday, October 22, 2016 20:35:27 WhatMeWorry via Digitalmars-d-learn wrote: [...] Just put it in a separate module and then import it. e.g. file: mypackage/constants.d == module mypackage.constants; GLfloat[] vertices = [ // Positions // Texture Coords -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, . (lots and lots of values) . ]; I would make this: immutable GLfloat[] vertices If you can do it. This will make it so it's a) accessible from pure functions, and b) will not create a separate thread-local copy for each thread (if you use threading). Ok, but now I'm getting these error in my new mypackage/constants.d ...\common\vertex_data.d(5,15): Error: undefined identifier 'GLfloat' ...\common\vertex_data.d(53,12): Error: undefined identifier 'vec3' It's difficult to know why without more code hints, but it appears that vertex_data.d needs to import the module that defines these types. Note that if you want to have an imported module provide these definitions from another module, then you need to public import the module. So for instance (guessing at your code, since I don't know what you have for import statements): mypackage/my_types.d: alias GLfloat = float; alias vec3 = GLfloat[3]; mypackage/constants.d: public import mypackage.my_types; // this allows importers of constants.d to see the types used GLfloat[] vertices = ... vertex_data.d: import mypackage.constants; // pulls in definitions from my_types.d -Steve
Re: Real Simple Question?
On Saturday, 22 October 2016 at 21:34:36 UTC, WhatMeWorry wrote: On Saturday, 22 October 2016 at 20:51:14 UTC, Jonathan M Davis wrote: [...] Ok, but now I'm getting these error in my new mypackage/constants.d ..\common\vertex_data.d(5,15): Error: undefined identifier 'GLfloat' ..\common\vertex_data.d(53,12): Error: undefined identifier 'vec3' Is there a way to just suck in the text from say a .txt file that would not be compiled before inclusion in main.d? You could format your array in JSON format, and read it in your program. That could be another solution.
Re: Real Simple Question?
On Saturday, October 22, 2016 21:34:36 WhatMeWorry via Digitalmars-d-learn wrote: > Ok, but now I'm getting these error in my new > mypackage/constants.d > > ..\common\vertex_data.d(5,15): Error: undefined identifier > 'GLfloat' > ..\common\vertex_data.d(53,12): Error: undefined identifier 'vec3' mypackage/constants.d needs to import the modules for any of the types it's using, otherwise it doesn't know about them. Modules are not textually included like header files are in C++ (compilation times would be _way_ worse if they were), so a module only has access to what it imports, and it's not affected by anything that imports it. > Is there a way to just suck in the text from say a .txt file that > would not be compiled before inclusion in main.d? String imports is a feature, but then you end up with multiple copies of the array in your program instead of one, and string imports are almost always the wrong solution. - Jonathan M Davis
Re: Real Simple Question?
On Saturday, 22 October 2016 at 20:51:14 UTC, Jonathan M Davis
wrote:
On Saturday, October 22, 2016 20:35:27 WhatMeWorry via
Digitalmars-d-learn wrote:
[...]
Just put it in a separate module and then import it. e.g.
file: mypackage/constants.d
==
module mypackage.constants;
GLfloat[] vertices =
[
// Positions // Texture Coords
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
.
(lots and lots of values)
.
];
==
file: main.d
==
import mypackage.constants;
void main()
{
auto v = vertices;
}
==
Probably the key thing to remember is that when you compile
your program, all of the modules that are part of your program
rather than a separate library need to be compiled into it.
Simply importing them isn't enough - though using either rdmd
or dub make that easier.
This is the official documentation's page on modules:
http://dlang.org/spec/module.html
This is the chapter from Al's book that covers modules:
http://ddili.org/ders/d.en/modules.html
And you'd almost certainly benefit from simply reading Ali's
book as a whole:
http://ddili.org/ders/d.en/index.html
- Jonathan M Davis
Ok, but now I'm getting these error in my new
mypackage/constants.d
..\common\vertex_data.d(5,15): Error: undefined identifier
'GLfloat'
..\common\vertex_data.d(53,12): Error: undefined identifier 'vec3'
Is there a way to just suck in the text from say a .txt file that
would not be compiled before inclusion in main.d?
Re: Real Simple Question?
On Saturday, October 22, 2016 20:35:27 WhatMeWorry via Digitalmars-d-learn
wrote:
> This is probably so simple that there's no example anywhere.
>
> Basically, I've got a huge array definition (see below) which I
> reuse over and over again in different projects.
>
> GLfloat[] vertices =
> [
> // Positions // Texture Coords
> -0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
> 0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
> .
> (lots and lots of values)
> .
>
> I'd like to place this one array into a separate file and just
> include it with a one line statement in many projects. I'm
> thinking mixins and/or imports but then if I knew how to do this,
> I wouldn't be asking.
>
> Thanks in advance.
Just put it in a separate module and then import it. e.g.
file: mypackage/constants.d
==
module mypackage.constants;
GLfloat[] vertices =
[
// Positions // Texture Coords
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
.
(lots and lots of values)
.
];
==
file: main.d
==
import mypackage.constants;
void main()
{
auto v = vertices;
}
==
Probably the key thing to remember is that when you compile your program,
all of the modules that are part of your program rather than a separate
library need to be compiled into it. Simply importing them isn't enough -
though using either rdmd or dub make that easier.
This is the official documentation's page on modules:
http://dlang.org/spec/module.html
This is the chapter from Al's book that covers modules:
http://ddili.org/ders/d.en/modules.html
And you'd almost certainly benefit from simply reading Ali's book as a
whole:
http://ddili.org/ders/d.en/index.html
- Jonathan M Davis
Real Simple Question?
This is probably so simple that there's no example anywhere. Basically, I've got a huge array definition (see below) which I reuse over and over again in different projects. GLfloat[] vertices = [ // Positions // Texture Coords -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, . (lots and lots of values) . I'd like to place this one array into a separate file and just include it with a one line statement in many projects. I'm thinking mixins and/or imports but then if I knew how to do this, I wouldn't be asking. Thanks in advance.
