doc: update README

README.md

@@ -274,10 +274,31 @@ const auto color = toml::find<std::string>(data, "fruit", "physical", "color");
 const auto shape = toml::find<std::string>(data, "fruit", "physical", "shape");
 ```
 
+### Finding a value in an array
+
+You can find n-th value in an array by `toml::find`.
+
+```toml
+values = ["foo", "bar", "baz"]
+```
+
+``` cpp
+const auto data   = toml::parse("sample.toml");
+const auto values = toml::find(data, "values");
+const auto bar    = toml::find<std::string>(values, 1);
+```
+
+`toml::find` can also search array recursively.
+
+```cpp
+const auto data = toml::parse("fruit.toml");
+const auto bar  = toml::find<std::string>(data, "values", 1);
+```
+
 ### In case of error
 
-If the value does not exist, `toml::find` throws an error with the location of
-the table.
+If the value does not exist, `toml::find` throws `std::out_of_range` with the
+location of the table.
 
 ```console
 terminate called after throwing an instance of 'std::out_of_range'
@@ -287,11 +308,6 @@ terminate called after throwing an instance of 'std::out_of_range'
    | ~~~~~ in this table
 ```
 
-**Note**: It is recommended to find a table as `toml::value` because it has much information
-compared to `toml::table`, which is an alias of
-`std::unordered_map<std::string, toml::value>`. Since `toml::table` does not have
-any information about toml file, such as where the table was defined in the file.
-
 ----
 
 If the specified type differs from the actual value contained, it throws