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+ removed data() function
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# Reference
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## Types and default values
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| JSON type | value_type | C++ type | type alias | default value |
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| ----------------------- | -------------------------- | ----------------------------- | ---------------------- | --------------
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| null | `value_type::null` | `nullptr_t` | - | `nullptr` |
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| string | `value_type::string` | `std::string` | `JSON::string_t` | `""` |
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| number (integer) | `value_type::number` | `int` | `JSON::number_t` | `0` |
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| number (floating point) | `value_type::number_float` | `double` | `JSON::number_float_t` | `0.0` |
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| array | `value_type::array ` | `std::array<JSON>` | `JSON::array_t` | `{}` |
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| object | `value_type::object` | `std::map<std::string, JSON>` | `JSON::object_t` | `{}` |
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## Conversions
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There are only a few type conversions possible:
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- An integer number can be translated to a floating point number (e.g., by calling `get<double>()`).
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- A floating pointnnumber can be translated to an integer number (e.g., by calling `get<int>()`). Note the number is truncated and not rounded, ceiled or floored.
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- Any value but JSON objects can be translated into an array. The result is a singleton array that consists of the value before.
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- Any other conversion will throw a `std::logic_error` exception.
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