Parsing of JSON data starting with "["

[mkaut]

I was not able to parse a JSON file containing a single array of objects, i.e., having "[" as its first element.
All the \JSONParseArray* methods require the array's key as their argument, but an array in the root of the file obviously does not have one - I tried using an empty key, but it did not work.

Is there a way to do it, or are these files not supported?
And if the latter, is it a bug, er just a limitation of the parser (that should be mentioned in the documentation)?

[jasperhabicht]

Thank you for your input! It is probably a bit hidden in the manual, but you can always address the whole JSON string (at the root level, so to say) with the pseudo key .. In this case, you can make use of this as follows:

\documentclass{article}
\usepackage{jsonparse}

\begin{document}

\JSONParse{\myjson}{
  [ "foo", "bar", "baz" ]
}

\JSONParseArrayUse{\myjson}{.}{, }

\newcommand{\myfunction}{\emph{\JSONParseArrayValue}, }
\JSONParseArrayMapFunction{\myjson}{.}{\myfunction}

\JSONParseArrayMapInline{\myjson}{.}{
    \JSONParseValue{\myjson}{[#1]}
}

\end{document}

Is this what you're aiming for?

[mkaut]

Thanks for the quick response :-)
I can confirm that {.} indeed works as expected, so this solves my problem.