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    <p>Since you asked for inspiration, I can immagine two directions you can take</p> <ol> <li><p>You can write code to hand-role your own JSON which, if your need is modest enough, can be a very light-weight and appropriate solution. It would be pretty simple Erlang to take that one data-structure and convert it to the JSON.</p> <p>"[[{\"id1\":1},{\"id2\":2},{\"id3\":3},{\"id4\":4}],[{\"id1\":5},{\"id2\":6} {\"id3\":7},{\"id4\":8}]]"</p></li> <li><p>You can produce a data-structure that mochiweb's mochijson:encode/1 and decode/1 can handle. I took your list and hand coded it to JSON, getting:</p> <p>X = "[[{\"id1\":1},{\"id2\":2},{\"id3\":3},{\"id4\":4}],[{\"id1\":5},{\"id2\":6},{\"id3\":7},{\"id4\":8}]]".</p></li> </ol> <p>then I used mochison:decode(X) to see what structure mochiweb uses to represent JSON (too lazy to look at the documentation). </p> <pre><code>Y = mochijson:decode(X). {array,[{array,[{struct,[{"id1",1}]}, {struct,[{"id2",2}]}, {struct,[{"id3",3}]}, {struct,[{"id4",4}]}]}, {array,[{struct,[{"id1",5}]}, {struct,[{"id2",6}]}, {struct,[{"id3",7}]}, {struct,[{"id4",8}]}]}]} </code></pre> <p>So, if you can create this slightly more elaborate data structure then the one you are using, then you can get the JSON by using mochijson:encode/1. Here is an example imbeddied in an io:format statement so that it prints it as a string -- often you would use the io_lib:format/X depending on your application.</p> <pre><code>io:format("~s~n",[mochijson:encode(Y)]). [[{"id1":1},{"id2":2},{"id3":3},{"id4":4}],[{"id1":5},{"id2":6},{"id3":7},{"id4":8}]] </code></pre>
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    1. POConvert a list to a JSON Object in erlang (mochijson)
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    1. COThank you. Now you got me thinking. Is this array representation actually a vild JSON Document ? It seems to me that X is actually representation of several documents a tupel or am i wrong?
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    2. COI believe X is valid Json, as I understand it's grammar(http://www.json.org/), Json can be nested
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    3. COhttp://www.json.org has a visual version of the grammar that is really clear. But, Json objects absolutely can contain Json objects just as XML can contain XML
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