rapidjson | 易学教程

record lcd

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修改.pro文件由于/usr/lib/x86_64-linux-gnu或/usr/lib/aarch64-linux-gnu中有ffmpeg版本，故要将库路径写在自己安装ffmpeg库路径之后。如： ##FFMPEG INCLUDEPATH += /home/frank/Documents/zhangyi/ffmpeg4/include LIBS += -L/home/frank/Documents/zhangyi/ffmpeg4/lib -lavcodec -lavdevice -lavfilter -lavformat -lavutil -lswresample -lswscale -lpostproc #system #INCLUDEPATH += /usr/lib \ ＃/usr/lib/aarch64-linux-gnu INCLUDEPATH += /usr/lib \ /usr/lib/x86_64-linux-gnu LIBS += -L/usr/lib #LIBS += -L/usr/lib/aarch64-linux-gnu LIBS += -L/usr/lib/x86_64-linux-gnu LIBS += -lglog -lgflags -lprotobuf -lboost_system -lboost_thread -llmdb -lleveldb

Getting n objects and their field from JSon, then store them as class object

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问题 Im trying to get information about my objects from JSon file. It contains n objects (2 for example) 4 fields each. I parse .json by rapidjson and my IDE is Qt Creator. I already tried using Pointers desribed at http://rapidjson.org/md_doc_pointer.html#JsonPointer and Query Objects from their basic tutorial, but somehow I can't get it working. that's how example .json file would look. { "opiekun1" : { "imie": "Maksym", "nazwisko": "Zawrotny", "email": "maksym@wp.pl", "haslo": "herbatka"},

Cpp: JSON parser in Cpp that provide support Serialize/Deserialize feature, converting JSON objects to user-defined classes?

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问题 I'm working on native C++ development and looking for JSON parser that can handle complex JSON files and convert into class objects. I've looked at native benchmarks for JSON parsers available in C++ and came to conclusion that RapidJSON is popular and best fit considering processing time and size handling. My requirement is to convert JSON objects to user defined classes and vice versa. The Jackson has Objectmapper class that provides functionality for reading and writing JSON, either to and

Parsing object inside array in rapidjson

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问题 I'm having problems implementing a recursive function that goes over the tree I get from the parsing of a json input. json input. e.g.: { "attr" : { "a": 1, "ovec": [ { "b": 2, "c": 3 }, { "d": 4} ] } } This is what we call a 'compound value of an attribute', and the value is simply a JSON doc. Its content is completely arbitrary (as long as its valid JSON). The problem is that with a Vector I have to loop using the type Value::ConstValueIterator (unlike for Object, where I use Value:

Parsing object inside array in rapidjson

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去中心化计算的未来：通过 RPC 从微服务过渡到WASM

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从浏览器内的角度来看，Wasm 最近的开发工作，理所当然地受到了广泛好评。在上一篇文章《只需5分钟，教你如何编写并执行一个 Rust WebAssembly 程序》，我们对 Rust 到 Wasm 的编译以及简单的浏览器内 Wasm 执行的案例做了演示。在另外一篇文章《区块链、硬件与面向服务的架构，WASM 即将迎来大爆发？》，里面有绝佳的浏览器内的 WASM 应用程序示例，并辅以了对WebAssembly（Wasm）的详细解释。浏览器之外 Wasm 不仅仅是浏览器的字节码。 Wasm 有着前所未有的强大的可移植性、高效率和灵活性。因此，我们现在可以做到，以多种不同语言编写浏览器内 Wasm 应用程序，发展到在所有设备上分发 Wasm 独立功能单元，在这一点上取得飞跃。 Wasm 执行环境可以包括最少的 shell、移动设备、台式机和物联网设备。Wasm 可能会推动从微芯片乃至整个数据中心，这所有一切的发展（Webassembly.org，2019）。为什么跨越浏览器很重要？当连接到现代 Web 服务时，我们并非仅仅与一台机器进行交互，而是持续和后台可能数千台机器进行交互（ Arpaci-Dusseau 和Arpaci-Dusseau，2018 ）。网站越复杂，运营成本就越高。散布在分布式系统上的微服务需要尽最大可能做到简单、高效和可靠。对于 Facebook

Looping over an array in RapidJson and getting the object elements

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问题 How do I get the value out of a ConstrValueIterator? In this case I know that the elements of the array are dictionaries (aka objects). Code summed up: for (rapidjson::Value::ConstValueIterator itr = rawbuttons.Begin(); itr != rawbuttons.End(); ++itr) { // Ok if (itr->HasMember("yes")) { // Ok auto somestring = itr["yes"]->GetString(); // error } } 回答1: Um. Iterators need to be dereferenced or whatever it's called. for (rapidjson::Value::ConstValueIterator itr = rawbuttons.Begin(); itr !=

Looping over an array in RapidJson and getting the object elements

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rapidjson: working code for reading document from file?

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问题 I need a working c++ code for reading document from file using rapidjson: https://code.google.com/p/rapidjson/ In the wiki it's yet undocumented, the examples unserialize only from std::string, I haven't a deep knowledge of templates. I serialized my document into a text file and this is the code I wrote, but it doesn't compile: #include "rapidjson/prettywriter.h" // for stringify JSON #include "rapidjson/writer.h" // for stringify JSON #include "rapidjson/filestream.h" // wrapper of C stream

Perform a copy of Document object of rapidjson

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问题 I'm making a class and I want to return my class inside a method. My class has a rapidjson::Document object. You can see the previous problems here: LNK2019: "Unresolved external symbol" with rapidjson As I discovered, rapidjson prevent you to perform any kind of copy of the Document object, and then the default copy of the class containing a Document object failed. I'm trying to define my own Copy Constructor but I need to perform a copy of the object. I saw a way to hypothetically copy the