<A>(self: TxChunk<A>): Effect.Effect<boolean>Checks whether the TxChunk is empty.
Example (Checking for an empty chunk)
import { Effect, TxChunk } from "effect"
const program = Effect.gen(function*() {
const emptyChunk = yield* TxChunk.empty<number>()
const nonEmptyChunk = yield* TxChunk.fromIterable([1, 2, 3])
// Check if chunks are empty - automatically transactional
const isEmpty1 = yield* TxChunk.isEmpty(emptyChunk)
const isEmpty2 = yield* TxChunk.isEmpty(nonEmptyChunk)
console.log(isEmpty1) // true
console.log(isEmpty2) // false
})combinators
Source effect/TxChunk.ts:4962 lines
export const const isEmpty: <A>(
self: TxChunk<A>
) => Effect.Effect<boolean>
Checks whether the TxChunk is empty.
Example (Checking for an empty chunk)
import { Effect, TxChunk } from "effect"
const program = Effect.gen(function*() {
const emptyChunk = yield* TxChunk.empty<number>()
const nonEmptyChunk = yield* TxChunk.fromIterable([1, 2, 3])
// Check if chunks are empty - automatically transactional
const isEmpty1 = yield* TxChunk.isEmpty(emptyChunk)
const isEmpty2 = yield* TxChunk.isEmpty(nonEmptyChunk)
console.log(isEmpty1) // true
console.log(isEmpty2) // false
})
isEmpty = <function (type parameter) A in <A>(self: TxChunk<A>): Effect.Effect<boolean>A>(self: TxChunk<A>(parameter) self: {
ref: TxRef.TxRef<Chunk.Chunk<A>>;
toString: () => string;
toJSON: () => unknown;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
}
interface TxChunk<in out A>TxChunk is a transactional chunk data structure that provides Software Transactional Memory (STM)
semantics for chunk operations.
Details
Accessed values are tracked by the transaction in order to detect conflicts and to track changes.
A transaction will retry whenever a conflict is detected or whenever the transaction explicitly
calls Effect.txRetry and any of the accessed TxChunk values change.
Example (Using a transactional chunk)
import { Chunk, Effect, TxChunk } from "effect"
const program = Effect.gen(function*() {
// Create a transactional chunk
const txChunk: TxChunk.TxChunk<number> = yield* TxChunk.fromIterable([
1,
2,
3
])
// Single operations - no explicit transaction needed
yield* TxChunk.append(txChunk, 4)
const result = yield* TxChunk.get(txChunk)
console.log(Chunk.toReadonlyArray(result)) // [1, 2, 3, 4]
// Multi-step atomic operation - use explicit transaction
yield* Effect.tx(
Effect.gen(function*() {
yield* TxChunk.prepend(txChunk, 0)
yield* TxChunk.append(txChunk, 5)
})
)
const finalResult = yield* TxChunk.get(txChunk)
console.log(Chunk.toReadonlyArray(finalResult)) // [0, 1, 2, 3, 4, 5]
})
TxChunk<function (type parameter) A in <A>(self: TxChunk<A>): Effect.Effect<boolean>A>): import EffectEffect.type Effect.Effect = /*unresolved*/ anyEffect<boolean> =>
const modify: {
<A, R>(
f: (
current: Chunk.Chunk<NoInfer<A>>
) => [
returnValue: R,
newValue: Chunk.Chunk<A>
]
): (self: TxChunk<A>) => Effect.Effect<R>
<A, R>(
self: TxChunk<A>,
f: (
current: Chunk.Chunk<A>
) => [
returnValue: R,
newValue: Chunk.Chunk<A>
]
): Effect.Effect<R>
}
self: TxChunk<A>(parameter) self: {
ref: TxRef.TxRef<Chunk.Chunk<A>>;
toString: () => string;
toJSON: () => unknown;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
}
current: Chunk.Chunk<A>(parameter) current: {
length: number;
right: Chunk<A>;
left: Chunk<A>;
backing: Backing<A>;
depth: number;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
import ChunkChunk.isEmpty(current: Chunk.Chunk<A>(parameter) current: {
length: number;
right: Chunk<A>;
left: Chunk<A>;
backing: Backing<A>;
depth: number;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
current: Chunk.Chunk<A>(parameter) current: {
length: number;
right: Chunk<A>;
left: Chunk<A>;
backing: Backing<A>;
depth: number;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
Referenced by 1 symbols