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29 lines
815 B
Markdown
29 lines
815 B
Markdown
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# JSON Patch
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On top of this, **JSON Patch** ([RFC 6902](https://tools.ietf.org/html/rfc6902)) allows to describe differences between two JSON values - effectively allowing patch and diff operations known from Unix.
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```cpp
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// a JSON patch (RFC 6902)
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json j_patch = R"([
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{ "op": "replace", "path": "/baz", "value": "boo" },
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{ "op": "add", "path": "/hello", "value": ["world"] },
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{ "op": "remove", "path": "/foo"}
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])"_json;
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// apply the patch
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json j_result = j_original.patch(j_patch);
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// {
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// "baz": "boo",
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// "hello": ["world"]
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// }
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// calculate a JSON patch from two JSON values
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json::diff(j_result, j_original);
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// [
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// { "op":" replace", "path": "/baz", "value": ["one", "two", "three"] },
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// { "op": "remove","path": "/hello" },
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// { "op": "add", "path": "/foo", "value": "bar" }
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// ]
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```
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