So I am using vibe.d json module to parse some array data with
homogeneous objects, and I want to convert it to CSV.
Aside from encoding double-qoutes, this is want I came up with to
generate the header:
```
void csvHeader(const Json jsonObject)
{
return keys(jsonObject.get!(Json[string])).stdMap!(a
=>`"`~a~`"`).joiner(",");
}
```
I can probably use zip to get the quotes around the names, to
avoid concatenation. But it works fine the way it is. The problem
is, the following doesn't:
```
void csvRow(const Json jsonObject)
{
return values(jsonObject.get!(Json[string])).stdMap!(a
=>`"`~a~`"`).joiner(",");
}
```
source\app.d(84): Error: template std.algorithm.joiner cannot
deduce function from argument types !()(MapResult!(__lambda3,
const(Json)[]), string), candidates are:
std\algorithm.d(3403): std.algorithm.joiner(RoR, Separator)(RoR
r, Separator sep) if (isInputRange!RoR &&
isInputRange!(ElementType!RoR) && isForwardRange!Separator &&
is(ElementType!Separator : ElementType!(ElementType!RoR)))
std\algorithm.d(3670): std.algorithm.joiner(RoR)(RoR r) if
(isInputRange!RoR && isInputRange!(ElementType!RoR))
