Function recursiveMerge

recursiveMerge<T extends Record<string, unknown>>(
base: T,
patch: RecursivePartial<T> | null | undefined,
): T
Recursively merges a patch object into a base object.

This function performs a deep merge for nested records. Arrays and primitive types in the patch object will overwrite the corresponding values in base.
Type Parameters
- T extends Record<string, unknown>
  The type of the base record.
Parameters
- base: T
  The initial record object.
- patch: RecursivePartial<T> | null | undefined
  The partial record containing updates. If null or undefined, base is returned as-is.
Returns T
A new object containing the merged properties.
Example
```
const base = { a: 1, b: { c: 2 } };
const patch = { b: { d: 3 }, e: 4 };
const result = recursiveMerge(base, patch);
// { a: 1, b: { c: 2, d: 3 }, e: 4 }
```
Remarks
- This function is pure; it does not modify base or patch.
- In some cases, the original base will be returned, so take care when modifying the result.
- Properties with undefined values in patch are ignored.
- Properties with null values in patch overwrite the values in base.
- Defined in data-structure/record.ts:82