Function RMap

RMap<K extends TSchema, V extends TSchema>(
keySchema: K,
valueSchema: V,
): TRMap<K, V>
Creates a schema for homogeneous maps with key type K and value type V.

All keys and values must match their respective types. The wire format encodes key type (1 byte), value type (1 byte), then key-value pairs in sequence with a length prefix. Keys must be unique.
Type Parameters
- K extends TSchema
- V extends TSchema
Parameters
- keySchema: K
  Schema defining the type of all keys
- valueSchema: V
  Schema defining the type of all values
Returns TRMap<K, V>
A Relish schema for maps with keys of type K and values of type V
Example
```
import { RMap, RString, RU32, createCodec, type Static } from '@grounds/schema';

const schema = RMap(RString(), RU32());
type StringToNumber = Static<typeof schema>;
const codec = createCodec(schema);

codec.encode(new Map([['count', 42]])).match(
  (bytes) => console.log('Map encoded:', bytes),
  (error) => console.error(error)
);
```
Remarks
TypeBox doesn't have native Map support, so Relish uses custom schema handling. Keys and value schemas are attached via symbol properties for codec use.
See
- RArray for homogeneous collections without keys
- RStruct for heterogeneous collections with string field names