<A>(self: TxPriorityQueue<A>): Effect.Effect<A>Takes the smallest element from the queue. Retries if the queue is empty.
Example (Taking the next value)
import { Effect, Order, TxPriorityQueue } from "effect"
const program = Effect.gen(function*() {
const pq = yield* TxPriorityQueue.fromIterable(Order.Number, [3, 1, 2])
const first = yield* TxPriorityQueue.take(pq)
console.log(first) // 1
})mutations
Source effect/TxPriorityQueue.ts:37610 lines
export const const take: <A>(
self: TxPriorityQueue<A>
) => Effect.Effect<A>
Takes the smallest element from the queue. Retries if the queue is empty.
Example (Taking the next value)
import { Effect, Order, TxPriorityQueue } from "effect"
const program = Effect.gen(function*() {
const pq = yield* TxPriorityQueue.fromIterable(Order.Number, [3, 1, 2])
const first = yield* TxPriorityQueue.take(pq)
console.log(first) // 1
})
take = <function (type parameter) A in <A>(self: TxPriorityQueue<A>): Effect.Effect<A>A>(self: TxPriorityQueue<A>(parameter) self: {
ref: TxRef.TxRef<Chunk<A>>;
ord: Order<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 TxPriorityQueue<in out A>A transactional priority queue backed by a sorted Chunk.
Details
Elements are stored in ascending order according to the Order provided at
construction time. take returns the smallest element, peek observes it
without removing.
Example (Dequeuing values by priority)
import { Effect, Order, TxPriorityQueue } from "effect"
const program = Effect.gen(function*() {
const pq = yield* TxPriorityQueue.empty<number>(Order.Number)
yield* TxPriorityQueue.offer(pq, 3)
yield* TxPriorityQueue.offer(pq, 1)
yield* TxPriorityQueue.offer(pq, 2)
const first = yield* TxPriorityQueue.take(pq)
console.log(first) // 1
})
TxPriorityQueue<function (type parameter) A in <A>(self: TxPriorityQueue<A>): Effect.Effect<A>A>): import EffectEffect.type Effect.Effect = /*unresolved*/ anyEffect<function (type parameter) A in <A>(self: TxPriorityQueue<A>): Effect.Effect<A>A> =>
import EffectEffect.gen(function*() {
const const chunk: Chunk<A>const chunk: {
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 TxRefTxRef.const get: <A>(
self: TxRef<A>
) => Effect.Effect<A>
Reads the current value of the TxRef.
When to use
Use to read the current value of a TxRef.
Example (Reading transactional references)
import { Effect, TxRef } from "effect"
const program = Effect.gen(function*() {
const counter = yield* TxRef.make(42)
// Read the value within a transaction
const value = yield* Effect.tx(
TxRef.get(counter)
)
console.log(value) // 42
})
get(self: TxPriorityQueue<A>(parameter) self: {
ref: TxRef.TxRef<Chunk<A>>;
ord: Order<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; <…;
}
TxPriorityQueue<in out A>.ref: TxRef.TxRef<Chunk<A>>(property) TxPriorityQueue<in out A>.ref: {
version: number;
pending: Map<unknown, () => void>;
value: A;
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; <…;
}
const head: Option<A>head = import CC.head(const chunk: Chunk<A>const chunk: {
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 OO.isNone(const head: Option<A>head)) {
return yield* import EffectEffect.txRetry
}
yield* import TxRefTxRef.const set: {
<A>(value: A): (
self: TxRef<A>
) => Effect.Effect<void>
<A>(
self: TxRef<A>,
value: A
): Effect.Effect<void>
}
self: TxPriorityQueue<A>(parameter) self: {
ref: TxRef.TxRef<Chunk<A>>;
ord: Order<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; <…;
}
TxPriorityQueue<in out A>.ref: TxRef.TxRef<Chunk<A>>(property) TxPriorityQueue<in out A>.ref: {
version: number;
pending: Map<unknown, () => void>;
value: A;
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; <…;
}
import CC.drop(const chunk: Chunk<A>const chunk: {
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;
}
const head: O.Some<A>const head: {
_tag: "Some";
_op: "Some";
value: A;
valueOrUndefined: A;
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 EffectEffect.tx)