Re: [Cppcms-users] access JSON array through path

[Artyom B. <art...@ya...>]

No it does not work like this. Also adding it is possible it would be quite sub-optimal as forexample the search for "foo.bar.baz" does virtually without any parsing or memory allocation.
So if get "foo.bar[5].baz" you'll need to first format a string with a number and let the json::value::get parse the number.
It is better to use:
   at("foo.bar")[5].get("baz")  
In your case:
    at("path.some_array")[2][2].at("deeply_nested")[0].get("foo",...)
This would actually be efficient.

Artyom Beilis
--------------
CppCMS - C++ Web Framework:   http://cppcms.com/
CppDB - C++ SQL Connectivity: http://cppcms.com/sql/cppdb/
 
      From: miniME <min...@go...>
 To: cpp...@li... 
 Sent: Saturday, November 8, 2014 11:50 PM
 Subject: [Cppcms-users] access JSON array through path
   
  Hey,
 
 is it possible to specify the path to a specific array value? 
 (see the "cppcms::json::value::get" method)
 
 consider the following JSON:
 
 {
    "path": {
         "some_array": [
             "val1",
             "val2",
              [
                     "nested_array1_val1",
                     "nested_array1_val2",
                     {
                           "deeply_nested" : [
                                   "foo"
                            ]
                     }
              ]
         ]
     }
 }
 
 I would expect to use the path including array values as following:
 
 "path.some_array[0]"  --> "val1"
 "path.some_array[1]"  --> "val2"
 "path.some_array[2]"  --> array
 
 even nested:
 "path.some_array[2][1]"  --> "nested_array1_val2"
 "path.some_array[2][2].deeply_nested[0]"  --> "foo"
 
 It is not documented and doesn't work like this. Is there some easy way to achive this? 
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