:sig
0_StringMap

:see
>types
0_Request
parse_query
encode_query
array_merge

:content
Associative container mapping `String` keys to `String` values.

`StringMap` is an alias for `std::map<String, String>`.

## Common Uses

`StringMap` commonly appears in:

- `context.params`
- `context.get`
- `context.post`
- `context.cookies`
- `context.session`
- `context.header`

Because it uses `std::map`, `map["key"]` will create an empty entry when that key does not already exist.

Helpers such as `parse_query()` and `encode_query()` convert between query strings and `StringMap` values.

:example
StringMap params;
params["page"] = "docs";
print(params["page"], "\n");