On Wednesday, 30 June 2021 at 03:55:05 UTC, Vladimir Panteleev
wrote:
If you want to give any type a "null" value, you could use
[`std.typecons.Nullable`](https://dlang.org/library/std/typecons/nullable.html).
At LEAST for some things with currency types like prices which
cannot be zero
On Wednesday, 30 June 2021 at 04:03:24 UTC, someone wrote:
On Wednesday, 30 June 2021 at 03:51:47 UTC, Mathias LANG wrote:
... is far from pretty but it works as expected, thanks for
your tip !
Can be made a bit prettier with UFCS:
```d
import std.math : isNaN;
float
On Wednesday, 30 June 2021 at 03:55:05 UTC, Vladimir Panteleev
wrote:
If you want to give any type a "null" value, you could use
[`std.typecons.Nullable`](https://dlang.org/library/std/typecons/nullable.html).
Practically Nullable!T stores a T and a bool.
I like the idea :)
On Wednesday, 30 June 2021 at 03:51:47 UTC, Mathias LANG wrote:
or use `std.math.isNaN`.
```d
import std.math : isNaN;
float lnumStockPricePreceding;
foreach (float lnumStockPrice; ludtStockPriceEvolution.range)
if (! isNan(lnumStockPricePreceding)) {
/// do something
}
On Wednesday, 30 June 2021 at 03:52:51 UTC, someone wrote:
One of the things I do not like with D, and it causes me to
shoot me on the foot over and over, is the lack of null for
*every* data type. Things like:
If you want to give any type a "null" value, you could use
On Wednesday, 30 June 2021 at 03:32:27 UTC, Vladimir Panteleev
wrote:
Comparison with `nan` always results in `false`:
THAT explains a lot !
See section 10.11.5:
missed it.
One of the things I do not like with D, and it causes me to shoot
me on the foot over and over, is the lack of
On Wednesday, 30 June 2021 at 03:32:27 UTC, Vladimir Panteleev
wrote:
On Wednesday, 30 June 2021 at 03:15:46 UTC, someone wrote:
Is the following code block valid ?
Comparison with `nan` always results in `false`:
See section 10.11.5:
On Wednesday, 30 June 2021 at 03:15:46 UTC, someone wrote:
Is the following code block valid ?
Comparison with `nan` always results in `false`:
See section 10.11.5:
https://dlang.org/spec/expression.html#equality_expressions
You can use the `is` operator to perform bitwise comparison, or
Is the following code block valid ?
```d
float price; /// initialized as float.nan by default ... right ?
if (price == float.nan) {
/// writeln("initialized");
} else {
/// writeln("uninitialized");
}
```
if so, the following one should be valid too ... right ?
```d
float price;
if
On Tuesday, 29 June 2021 at 23:32:21 UTC, SealabJaster wrote:
Not who you were asking but: they just don't work.
Doesn't matter, you're welcome :)
Maybe they don't support Windows for one reason or another.
Maybe their abstraction for whatever reason isn't able to
handle basic types for
On Tuesday, 29 June 2021 at 18:25:52 UTC, someone wrote:
Can you elaborate why you went your own way coding your own
bindings to pglib instead of using the existing ones ?
Not who you were asking but: they just don't work.
Maybe they don't support Windows for one reason or another.
Maybe
On Tuesday, 29 June 2021 at 20:27:15 UTC, Alain De Vos wrote:
Some implementations take all queries full in memory.
But what when i need one record.
And the select result could be huge.
If the result is huge and you just need one record ... ain't you
coding the query wrong to begin with ?
On Tuesday, 29 June 2021 at 20:40:29 UTC, Steven Schveighoffer
wrote:
On 6/29/21 4:25 PM, vnr wrote:
[...]
Has nothing to do with sessions, you are saving the text
posted, and then making it the default text whenever the page
is rendered.
On Tuesday, 29 June 2021 at 20:35:07 UTC, Alain De Vos wrote:
Some implementations take all queries full in memory.
But what when i need one record.
And the select result could be huge.
And we don't want swapping for this?
You can try my db package
On 6/29/21 4:25 PM, vnr wrote:
Nevertheless, the problem persists and seems to be even deeper, indeed,
my site is hosted on Heroku and I can see what a user who is on another
machine has written (behavior I just found out). Fortunately, this
little site is only for entertainment purposes, but
On Tuesday, 29 June 2021 at 20:27:15 UTC, Alain De Vos wrote:
On Tuesday, 29 June 2021 at 18:25:52 UTC, someone wrote:
On Tuesday, 29 June 2021 at 17:56:54 UTC, neuranuz wrote:
You could also try to find some ready to use bindings to
PostgreSQL on code.dlang.org.
Can you elaborate why you
On Tuesday, 29 June 2021 at 18:25:52 UTC, someone wrote:
On Tuesday, 29 June 2021 at 17:56:54 UTC, neuranuz wrote:
You could also try to find some ready to use bindings to
PostgreSQL on code.dlang.org.
Can you elaborate why you went your own way coding your own
bindings to pglib instead of
On Tuesday, 29 June 2021 at 19:05:43 UTC, WebFreak001 wrote:
On Tuesday, 29 June 2021 at 16:25:09 UTC, vnr wrote:
Hello
I have a bit of a problem that seems simple enough, but I
can't find an answer to my questions. On my website, I have
two textareas that the user can write on. When the
On Tuesday, 29 June 2021 at 16:25:09 UTC, vnr wrote:
Hello
I have a bit of a problem that seems simple enough, but I can't
find an answer to my questions. On my website, I have two
textareas that the user can write on. When the user reloads the
page or closes it and then reopens it, the
On Tuesday, 29 June 2021 at 19:05:43 UTC, WebFreak001 wrote:
[...]
I should add that this is a convenience feature for users and you
should avoid setting this unless it absolutely doesn't make sense
that stuff is prefilled for the user.
It's there to keep input in case you accidentally
On Tuesday, 29 June 2021 at 17:56:54 UTC, neuranuz wrote:
You could also try to find some ready to use bindings to
PostgreSQL on code.dlang.org.
Can you elaborate why you went your own way coding your own
bindings to pglib instead of using the existing ones ?
Is there something wrong with
insert into person (first_name, second_name)
select inp.* from inp
");
The last strings should be:
insert into person (first_name, second_name)
select inp.* from inp
", first_names, last_names);
On Monday, 28 June 2021 at 19:16:40 UTC, Alain De Vos wrote:
How to execute a random postgresql-query ?
With random i mean execute any string as known by postgresql.
void myexecutefunction(string string_to_execute){
// Some code to Execute postgre-sq-string
}
...
void main(){
On Monday, 28 June 2021 at 19:16:40 UTC, Alain De Vos wrote:
How to execute a random postgresql-query ?
With random i mean execute any string as known by postgresql.
void myexecutefunction(string string_to_execute){
// Some code to Execute postgre-sq-string
}
...
void main(){
On Monday, 28 June 2021 at 19:16:40 UTC, Alain De Vos wrote:
How to execute a random postgresql-query ?
With random i mean execute any string as known by postgresql.
void myexecutefunction(string string_to_execute){
// Some code to Execute postgre-sq-string
}
...
void main(){
Hello
I have a bit of a problem that seems simple enough, but I can't
find an answer to my questions. On my website, I have two
textareas that the user can write on. When the user reloads the
page or closes it and then reopens it, the text he wrote is still
written, which is quite
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