for(k, v; aa) { ... } is better than:

for(o; aa) {
    auto k = o.key, v = o.value;
    ...
}

right?

Are there any reason why .byKeyValue doesn't return a Tuple?

On Wednesday, 15 February 2017 at 21:54:20 UTC, Yuxuan Shui wrote:
> for(k, v; aa) { ... } is better than:
>
> for(o; aa) {
>     auto k = o.key, v = o.value;
>     ...
> }
>
> right?
>
> Are there any reason why .byKeyValue doesn't return a Tuple?

There's byPair (http://dlang.org/phobos/std_array.html#byPair) that as a library does exactly the following:

```
a.byKeyValue.map!(pair => tuple(pair.key, pair.value))
```

On Wednesday, 15 February 2017 at 22:02:01 UTC, Seb wrote:
> On Wednesday, 15 February 2017 at 21:54:20 UTC, Yuxuan Shui wrote:
>> for(k, v; aa) { ... } is better than:
>>
>> for(o; aa) {
>>     auto k = o.key, v = o.value;
>>     ...
>> }
>>
>> right?
>>
>> Are there any reason why .byKeyValue doesn't return a Tuple?
>
> There's byPair (http://dlang.org/phobos/std_array.html#byPair) that as a library does exactly the following:
>
> ```
> a.byKeyValue.map!(pair => tuple(pair.key, pair.value))
> ```

Thanks!

It should be more visible though. Can we include it here: https://dlang.org/spec/hash-map.html ?

On Thu, Feb 16, 2017 at 05:02:41AM +0000, Yuxuan Shui via Digitalmars-d wrote:
> On Wednesday, 15 February 2017 at 22:02:01 UTC, Seb wrote:
> > On Wednesday, 15 February 2017 at 21:54:20 UTC, Yuxuan Shui wrote:
> > > for(k, v; aa) { ... } is better than:
> > > 
> > > for(o; aa) {
> > >     auto k = o.key, v = o.value;
> > >     ...
> > > }
> > > 
> > > right?
> > > 
> > > Are there any reason why .byKeyValue doesn't return a Tuple?
> > 
> > There's byPair (http://dlang.org/phobos/std_array.html#byPair) that as a library does exactly the following:
> > 
> > ```
> > a.byKeyValue.map!(pair => tuple(pair.key, pair.value))
> > ```
> 
> Thanks!
> 
> It should be more visible though. Can we include it here: https://dlang.org/spec/hash-map.html ?

Please file a bug against dlang.org to request this doc update, so that people won't forget to do it.  Thanks!


T

-- 
It's amazing how careful choice of punctuation can leave you hanging:

On Thursday, 16 February 2017 at 05:20:32 UTC, H. S. Teoh wrote:
> On Thu, Feb 16, 2017 at 05:02:41AM +0000, Yuxuan Shui via Digitalmars-d wrote:
>> On Wednesday, 15 February 2017 at 22:02:01 UTC, Seb wrote:
>> > On Wednesday, 15 February 2017 at 21:54:20 UTC, Yuxuan Shui wrote:
>> > > [...]
>> > 
>> > There's byPair (http://dlang.org/phobos/std_array.html#byPair) that as a library does exactly the following:
>> > 
>> > ```
>> > a.byKeyValue.map!(pair => tuple(pair.key, pair.value))
>> > ```
>> 
>> Thanks!
>> 
>> It should be more visible though. Can we include it here: https://dlang.org/spec/hash-map.html ?
>
> Please file a bug against dlang.org to request this doc update, so that people won't forget to do it.  Thanks!
>
>
> T

Or just do it yourself - it's not that difficult:

https://github.com/dlang/dlang.org/edit/master/spec/hash-map.dd

On Thu, Feb 16, 2017 at 08:43:57AM +0000, Seb via Digitalmars-d wrote:
> On Thursday, 16 February 2017 at 05:20:32 UTC, H. S. Teoh wrote:
> > On Thu, Feb 16, 2017 at 05:02:41AM +0000, Yuxuan Shui via Digitalmars-d wrote:
> > > On Wednesday, 15 February 2017 at 22:02:01 UTC, Seb wrote:
[...]
> > > > There's byPair (http://dlang.org/phobos/std_array.html#byPair)
> > > > that as a library does exactly the following:
> > > > ```
> > > > a.byKeyValue.map!(pair => tuple(pair.key, pair.value))
> > > > ```
> > > 
> > > Thanks!
> > > 
> > > It should be more visible though. Can we include it here: https://dlang.org/spec/hash-map.html ?
> > 
> > Please file a bug against dlang.org to request this doc update, so that people won't forget to do it.  Thanks!
> > 
> > 
> > T
> 
> Or just do it yourself - it's not that difficult:
> 
> https://github.com/dlang/dlang.org/edit/master/spec/hash-map.dd

Well, I didn't have time to fix it then, and I almost forgot about it. But luckily I kept this thread alive in my mail reader, so here it is:

https://github.com/dlang/dlang.org/pull/1573


T

-- 
People say I'm indecisive, but I'm not sure about that. -- YHL, CONLANG