Re: Duplicate keys in array literals?

[bearophile]

Denis Shelomovskij:


File the issue please.


I have opened an issue, currently it's not an enhancement request:
https://d.puremagic.com/issues/show_bug.cgi?id=11637

In that issue I have also added more explanations and more code 
examples, with an extra small discussion about arrays with 
strongly typed indexes, that I have never stopped missing in D, 
being used to them since Delphi.


Bye,
bearophile

Re: Duplicate keys in array literals?

[luka8088]

On 28.11.2013. 21:01, Jacob Carlborg wrote:
> On 2013-11-28 18:55, luka8088 wrote:
> 
>> PHP also allows it:
>>
>> $data = array('a' => 1, 'a' => 2);
>>
>> And I find it to be only a source of bugs.
> 
> Arrays are a weird beast in PHP. They're both arrays and associative
> arrays, at the same time, somehow.
> 

They are associative array which can emulate array like behavior. But
unfortunately that has also in my experience turned out to be just
another source of bugs.

Re: Duplicate keys in array literals?

[Jacob Carlborg]

On 2013-11-28 18:55, luka8088 wrote:


PHP also allows it:

$data = array('a' => 1, 'a' => 2);

And I find it to be only a source of bugs.


Arrays are a weird beast in PHP. They're both arrays and associative 
arrays, at the same time, somehow.


--
/Jacob Carlborg

Re: Duplicate keys in array literals?

[Denis Shelomovskij]

28.11.2013 15:23, bearophile пишет:

Is it a good idea to silently statically accept duplicated keys in both
dynamic array literals and in associative array literals?


void main() {
 int[] a = [0:10, 0:20];
 int[int] aa = [0:10, 0:20];
}


I don't remember having ever had the need for this, and on the other
hand I have had some mistakes like this in my D code not caught
statically by the compiler.

---

Note that in this post I am not discussing about inserting multiple
times a key-pair in an associative array, this is normal and useful:

void main() {
 int[int] aa;
 aa[0] = 10;
 aa[0] = 20;
}

Bye,
bearophile


File the issue please.

--
Денис В. Шеломовский
Denis V. Shelomovskij

Re: Duplicate keys in array literals?

[luka8088]

On 28.11.2013. 12:23, bearophile wrote:
> Is it a good idea to silently statically accept duplicated keys in both
> dynamic array literals and in associative array literals?
> 
> 
> void main() {
> int[] a = [0:10, 0:20];
> int[int] aa = [0:10, 0:20];
> }
> 
> 
> I don't remember having ever had the need for this, and on the other
> hand I have had some mistakes like this in my D code not caught
> statically by the compiler.
> 
> ---
> 
> Note that in this post I am not discussing about inserting multiple
> times a key-pair in an associative array, this is normal and useful:
> 
> void main() {
> int[int] aa;
> aa[0] = 10;
> aa[0] = 20;
> }
> 
> Bye,
> bearophile

PHP also allows it:

$data = array('a' => 1, 'a' => 2);

And I find it to be only a source of bugs.

Re: Duplicate keys in array literals?

[Daniel Murphy]

"bearophile"  wrote in message 
news:befwnwpitihpcjfbd...@forum.dlang.org...
> Is it a good idea to silently statically accept duplicated keys in both 
> dynamic array literals and in associative array literals?
>

Looks like a bug to me. 

Duplicate keys in array literals?

[bearophile]

Is it a good idea to silently statically accept duplicated keys 
in both dynamic array literals and in associative array literals?



void main() {
int[] a = [0:10, 0:20];
int[int] aa = [0:10, 0:20];
}


I don't remember having ever had the need for this, and on the 
other hand I have had some mistakes like this in my D code not 
caught statically by the compiler.


---

Note that in this post I am not discussing about inserting 
multiple times a key-pair in an associative array, this is normal 
and useful:


void main() {
int[int] aa;
aa[0] = 10;
aa[0] = 20;
}

Bye,
bearophile