cppcms-users

[Cppcms-users] Setting JSON at the root

[Abhishek <abh...@gm...>]

Hi All,

Right now, I have seen examples of setting JSON key to set a value, for eg:

    my_object["name"]="Moshe";
    my_object["salary"]=1000.0;

which creates json like:
 {name:"Moshe", salary:"1000.0"}

But what if I want to create a json string like:

{"hello", "world", "value1", value2} ?

I have these values in a std::vector<std::string>

so, how should I create my_object to create json like --> {"hello", "world",
"value1", value2}

Re: [Cppcms-users] Setting JSON at the root

[Marcel H. <ke...@co...>]

On 26.09.2013 14:00, Abhishek wrote:
> Hi All,
>
> Right now, I have seen examples of setting JSON key to set a value, for eg:
>
>     my_object["name"]="Moshe";
>     my_object["salary"]=1000.0;
>
> which creates json like:
>  {name:"Moshe", salary:"1000.0"}
This is called an object.
> But what if I want to create a json string like:
>
> {"hello", "world", "value1", value2} ?
>
> I have these values in a std::vector<std::string>
>
> so, how should I create my_object to create json like --> {"hello", "world",
> "value1", value2}
what you mean is called array in json [0]
An array is something that is enclosed in squared brackets, like
[1,2,3,4]. This is possible. You just use the cppcms::json::array, which
is a typedef for std::vector<cppcms::json::value>. So it should work ;)
If you are using c++11 you can write this:

> #include <cppcms/json.h>
> cppcms::json::array a = {"string1", "string2", "string3"};

[0] http://en.wikipedia.org/wiki/Json#Data_types.2C_syntax_and_example

Re: [Cppcms-users] Setting JSON at the root

[Abhishek <abh...@gm...>]

Thanks for the clarification Marcel.

And yeah, I mean ["Hello", "world", "value1", "value2"] , but mistakenly
added curly brackets (braces). I meant array only.

So lets say, if I use:

cppcms::json::array is assigned std::vector<any_custom_object>

, where "any_custom_objects" trait class has been defined with json getters
and setters, will give the desired json array (of any_custom_object or
string, whatever used in vector)?

Re: [Cppcms-users] Setting JSON at the root

[Marcel H. <ke...@co...>]

On 26.09.2013 15:14, Abhishek wrote:
> Thanks for the clarification Marcel.
>
> And yeah, I mean ["Hello", "world", "value1", "value2"] , but mistakenly
> added curly brackets (braces). I meant array only.
>
> So lets say, if I use:
>
> cppcms::json::array is assigned std::vector<any_custom_object>
>
> , where "any_custom_objects" trait class has been defined with json getters
> and setters, will give the desired json array (of any_custom_object or
> string, whatever used in vector)?
Sorry, but after the 10th read, I still don't get what you want ;)
What I can say to you:
  * I don't know if cppcms parser support any other type than object as
root, I never tried
  * for any other information see
http://cppcms.com/wikipp/en/page/cppcms_1x_json and the api at
http://cppcms.com/cppcms_ref/latest/namespacecppcms_1_1json.html

If you have further question, please specify it. I'm sorry I'm not able
to help you atm.

Re: [Cppcms-users] Setting JSON at the root

[Lee E. <le...@el...>]

You can use any object that is convertible to json::value
and if the primitives, vector and are not sufficient, you can always define
json_traits class to convert whatever type you have to json::value and back


On Thu, Sep 26, 2013 at 11:18 PM, Marcel Hellwig <ke...@co...> wrote:

> On 26.09.2013 15:14, Abhishek wrote:
> > Thanks for the clarification Marcel.
> >
> > And yeah, I mean ["Hello", "world", "value1", "value2"] , but mistakenly
> > added curly brackets (braces). I meant array only.
> >
> > So lets say, if I use:
> >
> > cppcms::json::array is assigned std::vector<any_custom_object>
> >
> > , where "any_custom_objects" trait class has been defined with json
> getters
> > and setters, will give the desired json array (of any_custom_object or
> > string, whatever used in vector)?
> Sorry, but after the 10th read, I still don't get what you want ;)
> What I can say to you:
>   * I don't know if cppcms parser support any other type than object as
> root, I never tried
>   * for any other information see
> http://cppcms.com/wikipp/en/page/cppcms_1x_json and the api at
> http://cppcms.com/cppcms_ref/latest/namespacecppcms_1_1json.html
>
> If you have further question, please specify it. I'm sorry I'm not able
> to help you atm.
>
>
>
> ------------------------------------------------------------------------------
> October Webinars: Code for Performance
> Free Intel webinars can help you accelerate application performance.
> Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most
> from
> the latest Intel processors and coprocessors. See abstracts and register >
> http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk
> _______________________________________________
> Cppcms-users mailing list
> Cpp...@li...
> https://lists.sourceforge.net/lists/listinfo/cppcms-users
>
>