Function modifyMutRef

modifyMutRef<S, A>(
ref: MutRef<S, A>,
): (modifier: (oldValue: A) => A) => Mut.Mut<S, never[]>
Modifies a value of the reference in a scope of Mut environment.
Type Parameters
- S
- A
Parameters
- ref: MutRef<S, A>
  A target to modify.
Returns (modifier: (oldValue: A) => A) => Mut.Mut<S, never[]>
The modifying operation.
- Defined in src/mut.ts:273