I want to convert a string like " a,b<br/>1, 2<br/>3<br/> " to a 2D array like:
[["a", "b"],
 ["1", "2"],
 ["3", "" ]]


auto html = " a,b<br/>1, 2<br/>3<br/> ";
auto rows = html.strip.chomp("<br/>").split("<br/>");
string[][] data;
rows.each!(a => data ~= a.split(","));
string[][] result = data.map!(a => a.padRight("", data[0].length).map!(b => b.strip)).array;

but the result is not a string[][]:

Error: cannot implicitly convert expression `array(map(data))` of type `MapResult!(__lambda2, Result)[]` to `string[][]`

On Saturday, 24 February 2018 at 07:51:27 UTC, Domain wrote:
> I want to convert a string like " a,b<br/>1, 2<br/>3<br/> " to a 2D array like:
> [["a", "b"],
>  ["1", "2"],
>  ["3", "" ]]
>
>
> auto html = " a,b<br/>1, 2<br/>3<br/> ";
> auto rows = html.strip.chomp("<br/>").split("<br/>");
> string[][] data;
> rows.each!(a => data ~= a.split(","));
> string[][] result = data.map!(a => a.padRight("", data[0].length).map!(b => b.strip)).array;
>
> but the result is not a string[][]:
>
> Error: cannot implicitly convert expression `array(map(data))` of type `MapResult!(__lambda2, Result)[]` to `string[][]`

And why this not compile:

rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2));


Error: cannot deduce function from argument types !()(string[]), candidates are:
C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(899): C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(934):

On Saturday, 24 February 2018 at 08:59:46 UTC, Domain wrote:
> On Saturday, 24 February 2018 at 07:51:27 UTC, Domain wrote:
>> [...]
>
> And why this not compile:
>
> rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2));
>
>
> Error: cannot deduce function from argument types !()(string[]), candidates are:
> C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(899): C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(934):

OK, this compile:
rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2).array);

On Saturday, 24 February 2018 at 09:06:09 UTC, Domain wrote:
> On Saturday, 24 February 2018 at 08:59:46 UTC, Domain wrote:
>> On Saturday, 24 February 2018 at 07:51:27 UTC, Domain wrote:
>>> [...]
>>
>> And why this not compile:
>>
>> rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2));
>>
>>
>> Error: cannot deduce function from argument types !()(string[]), candidates are:
>> C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(899): C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(934):
>
> OK, this compile:
> rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2).array);

FYI: Idiomatic D would be to avoid allocations (faster!).
An example:

```
auto html = " a,b<br/>1, 2<br/>3<br/> ";
auto rows = html.strip.splitter("<br/>").filter!(not!empty).map!(a => a.splitter(","));
rows.writeln;
```

https://run.dlang.io/is/LC7Sog

If you really, really need a 2d array you can always do so if required at the end:

```
auto arr2d = rows.map!array.array;
```

But please keep in mind that you ideally avoid the allocations in the first place.