IORef overview
Mutable references in the IO
monad
Added in v2.0.0
Table of contents
constructors
newIORef
Signature
export declare function newIORef<A>(a: A): IO<IORef<A>>
Added in v2.0.0
model
IORef (class)
Signature
export declare class IORef<A> {
constructor(private value: A)
}
Example
import { flatMap } from 'fp-ts/IO'
import { newIORef } from 'fp-ts/IORef'
assert.strictEqual(flatMap(newIORef(1), (ref) => flatMap(ref.write(2), () => ref.read))(), 2)
Added in v2.0.0
write (method)
Signature
write(a: A): IO<void>
Added in v2.0.0
modify (method)
Signature
modify(f: (a: A) => A): IO<void>
Added in v2.0.0
read (property)
Signature
readonly read: IO<A>
Added in v2.0.0