<K>(key: K): <A, E>(self: FiberMap<K, A, E>) => Effect.Effect<boolean>
<K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>Checks whether a key exists in the FiberMap.
This is the Effect-wrapped version of hasUnsafe.
Example (Checking if a key exists)
import { Effect, FiberMap } from "effect"
const program = Effect.gen(function*() {
const map = yield* FiberMap.make<string>()
// Add a fiber to the map
yield* FiberMap.run(map, "task1", Effect.never)
// Check if keys exist using Effect
const exists1 = yield* FiberMap.has(map, "task1")
const exists2 = yield* FiberMap.has(map, "task2")
console.log(exists1) // true
console.log(exists2) // false
})combinators
Source effect/FiberMap.ts:6027 lines
export const const has: {
<K>(key: K): <A, E>(
self: FiberMap<K, A, E>
) => Effect.Effect<boolean>
<K, A, E>(
self: FiberMap<K, A, E>,
key: K
): Effect.Effect<boolean>
}
Checks whether a key exists in the FiberMap.
This is the Effect-wrapped version of hasUnsafe.
Example (Checking if a key exists)
import { Effect, FiberMap } from "effect"
const program = Effect.gen(function*() {
const map = yield* FiberMap.make<string>()
// Add a fiber to the map
yield* FiberMap.run(map, "task1", Effect.never)
// Check if keys exist using Effect
const exists1 = yield* FiberMap.has(map, "task1")
const exists2 = yield* FiberMap.has(map, "task2")
console.log(exists1) // true
console.log(exists2) // false
})
has: {
<function (type parameter) K in <K>(key: K): <A, E>(self: FiberMap<K, A, E>) => Effect.Effect<boolean>K>(key: Kkey: function (type parameter) K in <K>(key: K): <A, E>(self: FiberMap<K, A, E>) => Effect.Effect<boolean>K): <function (type parameter) A in <A, E>(self: FiberMap<K, A, E>): Effect.Effect<boolean>A, function (type parameter) E in <A, E>(self: FiberMap<K, A, E>): Effect.Effect<boolean>E>(self: FiberMap<K, A, E>(parameter) self: {
deferred: Deferred.Deferred<void, unknown>;
state: { readonly _tag: "Open"; readonly backing: MutableHashMap.MutableHashMap<K, Fiber.Fiber<A, E>> } | { readonly _tag: "Closed" };
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;
}
interface FiberMap<in out K, out A = unknown, out E = unknown>A FiberMap is a collection of fibers, indexed by a key. When the associated
Scope is closed, all fibers in the map will be interrupted. Fibers are
automatically removed from the map when they complete.
Example (Managing fibers in a map)
import { Effect, FiberMap } from "effect"
// Create a FiberMap with string keys
const program = Effect.gen(function*() {
const map = yield* FiberMap.make<string>()
// Add some fibers to the map
yield* FiberMap.run(map, "task1", Effect.never)
yield* FiberMap.run(map, "task2", Effect.never)
// Get the size of the map
const size = yield* FiberMap.size(map)
console.log(size) // 2
})
FiberMap<function (type parameter) K in <K>(key: K): <A, E>(self: FiberMap<K, A, E>) => Effect.Effect<boolean>K, function (type parameter) A in <A, E>(self: FiberMap<K, A, E>): Effect.Effect<boolean>A, function (type parameter) E in <A, E>(self: FiberMap<K, A, E>): Effect.Effect<boolean>E>) => import EffectEffect.type Effect.Effect = /*unresolved*/ anyEffect<boolean>
<function (type parameter) K in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>K, function (type parameter) A in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>A, function (type parameter) E in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>E>(self: FiberMap<K, A, E>(parameter) self: {
deferred: Deferred.Deferred<void, unknown>;
state: { readonly _tag: "Open"; readonly backing: MutableHashMap.MutableHashMap<K, Fiber.Fiber<A, E>> } | { readonly _tag: "Closed" };
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;
}
interface FiberMap<in out K, out A = unknown, out E = unknown>A FiberMap is a collection of fibers, indexed by a key. When the associated
Scope is closed, all fibers in the map will be interrupted. Fibers are
automatically removed from the map when they complete.
Example (Managing fibers in a map)
import { Effect, FiberMap } from "effect"
// Create a FiberMap with string keys
const program = Effect.gen(function*() {
const map = yield* FiberMap.make<string>()
// Add some fibers to the map
yield* FiberMap.run(map, "task1", Effect.never)
yield* FiberMap.run(map, "task2", Effect.never)
// Get the size of the map
const size = yield* FiberMap.size(map)
console.log(size) // 2
})
FiberMap<function (type parameter) K in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>K, function (type parameter) A in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>A, function (type parameter) E in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>E>, key: Kkey: function (type parameter) K in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>K): import EffectEffect.type Effect.Effect = /*unresolved*/ anyEffect<boolean>
} = dual<(...args: Array<any>) => any, <K, A, E>(self: FiberMap<K, A, E>, key: K) => Effect.Effect<boolean>>(arity: 2, body: <K, A, E>(self: FiberMap<K, A, E>, key: K) => Effect.Effect<boolean>): ((...args: Array<any>) => any) & (<K, A, E>(self: FiberMap<K, A, E>, key: K) => Effect.Effect<boolean>) (+1 overload)Creates a function that can be called in data-first style or data-last
(pipe-friendly) style.
When to use
Use to expose one implementation through both direct and pipe-friendly
call styles.
Details
Pass either the arity of the uncurried function or a predicate that decides
whether the current call is data-first. Arity is the common case. Use a
predicate when optional arguments make arity ambiguous.
Example (Selecting data-first or data-last style by arity)
import { Function, pipe } from "effect"
const sum = Function.dual<
(that: number) => (self: number) => number,
(self: number, that: number) => number
>(2, (self, that) => self + that)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
Example (Defining overloads with call signatures)
import { Function, pipe } from "effect"
const sum: {
(that: number): (self: number) => number
(self: number, that: number): number
} = Function.dual(2, (self: number, that: number): number => self + that)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
Example (Selecting data-first or data-last style with a predicate)
import { Function, pipe } from "effect"
const sum = Function.dual<
(that: number) => (self: number) => number,
(self: number, that: number) => number
>(
(args) => args.length === 2,
(self, that) => self + that
)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
dual(
2,
<function (type parameter) K in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>K, function (type parameter) A in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>A, function (type parameter) E in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>E>(self: FiberMap<K, A, E>(parameter) self: {
deferred: Deferred.Deferred<void, unknown>;
state: { readonly _tag: "Open"; readonly backing: MutableHashMap.MutableHashMap<K, Fiber.Fiber<A, E>> } | { readonly _tag: "Closed" };
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;
}
interface FiberMap<in out K, out A = unknown, out E = unknown>A FiberMap is a collection of fibers, indexed by a key. When the associated
Scope is closed, all fibers in the map will be interrupted. Fibers are
automatically removed from the map when they complete.
Example (Managing fibers in a map)
import { Effect, FiberMap } from "effect"
// Create a FiberMap with string keys
const program = Effect.gen(function*() {
const map = yield* FiberMap.make<string>()
// Add some fibers to the map
yield* FiberMap.run(map, "task1", Effect.never)
yield* FiberMap.run(map, "task2", Effect.never)
// Get the size of the map
const size = yield* FiberMap.size(map)
console.log(size) // 2
})
FiberMap<function (type parameter) K in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>K, function (type parameter) A in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>A, function (type parameter) E in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>E>, key: Kkey: function (type parameter) K in <K, A, E>(self: FiberMap<K, A, E>, key: K): Effect.Effect<boolean>K): import EffectEffect.type Effect.Effect = /*unresolved*/ anyEffect<boolean> => import EffectEffect.sync(() => const hasUnsafe: {
<K>(key: K): <A, E>(
self: FiberMap<K, A, E>
) => boolean
<K, A, E>(
self: FiberMap<K, A, E>,
key: K
): boolean
}
self: FiberMap<K, A, E>(parameter) self: {
deferred: Deferred.Deferred<void, unknown>;
state: { readonly _tag: "Open"; readonly backing: MutableHashMap.MutableHashMap<K, Fiber.Fiber<A, E>> } | { readonly _tag: "Closed" };
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;
}
key: Kkey))
)