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nlohmann
2026-10-03 05:43:12 +00:00
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features/element_access/checked_access/index.html
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features/element_access/checked_access/index.md
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@@ -4,7 +4,7 @@
The [`at`](https://json.nlohmann.me/api/basic_json/at/index.md) member function performs checked access; that is, it returns a reference to the desired value if it exists and throws a [`basic_json::out_of_range` exception](https://json.nlohmann.me/home/exceptions/#out-of-range) otherwise.
Read access
Example: read access
Consider the following JSON value:
@@ -29,7 +29,7 @@ Assume the value is parsed to a `json` variable `j`.
The return value is a reference, so it can be used to modify the original value.
Write access
Example: write access
```
j.at("name") = "John Smith";
@@ -47,7 +47,7 @@ This code produces the following JSON value:
When accessing an invalid index (i.e., an index greater than or equal to the array size) or the passed object key is non-existing, an exception is thrown.
Accessing via invalid index or missing key
Example: access via invalid index or missing key
```
j.at("hobbies").at(3) = "cooking";