<K>(key: K): <V>(self: MutableHashMap<K, V>) => Option.Option<V>
<K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>Looks up a key in the MutableHashMap safely.
When to use
Use to safely read a MutableHashMap value for a key as an Option.
Details
Returns Some(value) when an equal key is present and None when the key is
absent.
Example (Getting a value)
import { MutableHashMap } from "effect"
const map = MutableHashMap.make(["key1", 42], ["key2", 100])
console.log(MutableHashMap.get(map, "key1")) // Some(42)
console.log(MutableHashMap.get(map, "key3")) // None
// Pipe-able version
const getValue = MutableHashMap.get("key1")
console.log(getValue(map)) // Some(42)export const const get: {
<K>(key: K): <V>(
self: MutableHashMap<K, V>
) => Option.Option<V>
<K, V>(
self: MutableHashMap<K, V>,
key: K
): Option.Option<V>
}
Looks up a key in the MutableHashMap safely.
When to use
Use to safely read a MutableHashMap value for a key as an Option.
Details
Returns Some(value) when an equal key is present and None when the key is
absent.
Example (Getting a value)
import { MutableHashMap } from "effect"
const map = MutableHashMap.make(["key1", 42], ["key2", 100])
console.log(MutableHashMap.get(map, "key1")) // Some(42)
console.log(MutableHashMap.get(map, "key3")) // None
// Pipe-able version
const getValue = MutableHashMap.get("key1")
console.log(getValue(map)) // Some(42)
get: {
<function (type parameter) K in <K>(key: K): <V>(self: MutableHashMap<K, V>) => Option.Option<V>K>(key: Kkey: function (type parameter) K in <K>(key: K): <V>(self: MutableHashMap<K, V>) => Option.Option<V>K): <function (type parameter) V in <V>(self: MutableHashMap<K, V>): Option.Option<V>V>(self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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 MutableHashMap<out K, out V>A mutable hash map that stores key-value pairs and supports both referential
and Effect structural equality.
When to use
Use as a mutable key-value map when in-place updates are acceptable and keys
may rely on Effect structural equality.
Details
Operations mutate the map in place. Keys that implement Equal / Hash can
be looked up structurally; other keys use normal JavaScript reference or
primitive equality.
Example (Using a mutable hash map)
import { MutableHashMap } from "effect"
// Create a mutable hash map with string keys and number values
const map: MutableHashMap.MutableHashMap<string, number> = MutableHashMap
.empty()
// Add some data
MutableHashMap.set(map, "count", 42)
MutableHashMap.set(map, "total", 100)
// Use as iterable
for (const [key, value] of map) {
console.log(`${key}: ${value}`)
}
// Output:
// count: 42
// total: 100
// Convert to array
const entries = Array.from(map)
console.log(entries) // [["count", 42], ["total", 100]]
MutableHashMap<function (type parameter) K in <K>(key: K): <V>(self: MutableHashMap<K, V>) => Option.Option<V>K, function (type parameter) V in <V>(self: MutableHashMap<K, V>): Option.Option<V>V>) => import OptionOption.type Option<A> = Option.None<A> | Option.Some<A>The Option data type represents optional values. An Option<A> is either
Some<A>, containing a value of type A, or None, representing absence.
When to use
Use to represent initial values that may not yet exist
- Returning from partial functions (not defined for all inputs)
- Managing optional fields in data structures
Namespace containing utility types for Option.
When to use
Use to access type-level helpers associated with Option.
Option<function (type parameter) V in <V>(self: MutableHashMap<K, V>): Option.Option<V>V>
<function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K, function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V>(self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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 MutableHashMap<out K, out V>A mutable hash map that stores key-value pairs and supports both referential
and Effect structural equality.
When to use
Use as a mutable key-value map when in-place updates are acceptable and keys
may rely on Effect structural equality.
Details
Operations mutate the map in place. Keys that implement Equal / Hash can
be looked up structurally; other keys use normal JavaScript reference or
primitive equality.
Example (Using a mutable hash map)
import { MutableHashMap } from "effect"
// Create a mutable hash map with string keys and number values
const map: MutableHashMap.MutableHashMap<string, number> = MutableHashMap
.empty()
// Add some data
MutableHashMap.set(map, "count", 42)
MutableHashMap.set(map, "total", 100)
// Use as iterable
for (const [key, value] of map) {
console.log(`${key}: ${value}`)
}
// Output:
// count: 42
// total: 100
// Convert to array
const entries = Array.from(map)
console.log(entries) // [["count", 42], ["total", 100]]
MutableHashMap<function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K, function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V>, key: Kkey: function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K): import OptionOption.type Option<A> = Option.None<A> | Option.Some<A>The Option data type represents optional values. An Option<A> is either
Some<A>, containing a value of type A, or None, representing absence.
When to use
Use to represent initial values that may not yet exist
- Returning from partial functions (not defined for all inputs)
- Managing optional fields in data structures
Namespace containing utility types for Option.
When to use
Use to access type-level helpers associated with Option.
Option<function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V>
} = dual<<K>(key: K) => <V>(self: MutableHashMap<K, V>) => Option.Option<V>, <K, V>(self: MutableHashMap<K, V>, key: K) => Option.Option<V>>(arity: 2, body: <K, V>(self: MutableHashMap<K, V>, key: K) => Option.Option<V>): (<K>(key: K) => <V>(self: MutableHashMap<K, V>) => Option.Option<V>) & (<K, V>(self: MutableHashMap<K, V>, key: K) => Option.Option<V>) (+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<
<function (type parameter) K in <K>(key: K): <V>(self: MutableHashMap<K, V>) => Option.Option<V>K>(key: Kkey: function (type parameter) K in <K>(key: K): <V>(self: MutableHashMap<K, V>) => Option.Option<V>K) => <function (type parameter) V in <V>(self: MutableHashMap<K, V>): Option.Option<V>V>(self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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 MutableHashMap<out K, out V>A mutable hash map that stores key-value pairs and supports both referential
and Effect structural equality.
When to use
Use as a mutable key-value map when in-place updates are acceptable and keys
may rely on Effect structural equality.
Details
Operations mutate the map in place. Keys that implement Equal / Hash can
be looked up structurally; other keys use normal JavaScript reference or
primitive equality.
Example (Using a mutable hash map)
import { MutableHashMap } from "effect"
// Create a mutable hash map with string keys and number values
const map: MutableHashMap.MutableHashMap<string, number> = MutableHashMap
.empty()
// Add some data
MutableHashMap.set(map, "count", 42)
MutableHashMap.set(map, "total", 100)
// Use as iterable
for (const [key, value] of map) {
console.log(`${key}: ${value}`)
}
// Output:
// count: 42
// total: 100
// Convert to array
const entries = Array.from(map)
console.log(entries) // [["count", 42], ["total", 100]]
MutableHashMap<function (type parameter) K in <K>(key: K): <V>(self: MutableHashMap<K, V>) => Option.Option<V>K, function (type parameter) V in <V>(self: MutableHashMap<K, V>): Option.Option<V>V>) => import OptionOption.type Option<A> = Option.None<A> | Option.Some<A>The Option data type represents optional values. An Option<A> is either
Some<A>, containing a value of type A, or None, representing absence.
When to use
Use to represent initial values that may not yet exist
- Returning from partial functions (not defined for all inputs)
- Managing optional fields in data structures
Namespace containing utility types for Option.
When to use
Use to access type-level helpers associated with Option.
Option<function (type parameter) V in <V>(self: MutableHashMap<K, V>): Option.Option<V>V>,
<function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K, function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V>(self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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 MutableHashMap<out K, out V>A mutable hash map that stores key-value pairs and supports both referential
and Effect structural equality.
When to use
Use as a mutable key-value map when in-place updates are acceptable and keys
may rely on Effect structural equality.
Details
Operations mutate the map in place. Keys that implement Equal / Hash can
be looked up structurally; other keys use normal JavaScript reference or
primitive equality.
Example (Using a mutable hash map)
import { MutableHashMap } from "effect"
// Create a mutable hash map with string keys and number values
const map: MutableHashMap.MutableHashMap<string, number> = MutableHashMap
.empty()
// Add some data
MutableHashMap.set(map, "count", 42)
MutableHashMap.set(map, "total", 100)
// Use as iterable
for (const [key, value] of map) {
console.log(`${key}: ${value}`)
}
// Output:
// count: 42
// total: 100
// Convert to array
const entries = Array.from(map)
console.log(entries) // [["count", 42], ["total", 100]]
MutableHashMap<function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K, function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V>, key: Kkey: function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K) => import OptionOption.type Option<A> = Option.None<A> | Option.Some<A>The Option data type represents optional values. An Option<A> is either
Some<A>, containing a value of type A, or None, representing absence.
When to use
Use to represent initial values that may not yet exist
- Returning from partial functions (not defined for all inputs)
- Managing optional fields in data structures
Namespace containing utility types for Option.
When to use
Use to access type-level helpers associated with Option.
Option<function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V>
>(2, <function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K, function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V>(self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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 MutableHashMap<out K, out V>A mutable hash map that stores key-value pairs and supports both referential
and Effect structural equality.
When to use
Use as a mutable key-value map when in-place updates are acceptable and keys
may rely on Effect structural equality.
Details
Operations mutate the map in place. Keys that implement Equal / Hash can
be looked up structurally; other keys use normal JavaScript reference or
primitive equality.
Example (Using a mutable hash map)
import { MutableHashMap } from "effect"
// Create a mutable hash map with string keys and number values
const map: MutableHashMap.MutableHashMap<string, number> = MutableHashMap
.empty()
// Add some data
MutableHashMap.set(map, "count", 42)
MutableHashMap.set(map, "total", 100)
// Use as iterable
for (const [key, value] of map) {
console.log(`${key}: ${value}`)
}
// Output:
// count: 42
// total: 100
// Convert to array
const entries = Array.from(map)
console.log(entries) // [["count", 42], ["total", 100]]
MutableHashMap<function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K, function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V>, key: Kkey: function (type parameter) K in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>K): import OptionOption.type Option<A> = Option.None<A> | Option.Some<A>The Option data type represents optional values. An Option<A> is either
Some<A>, containing a value of type A, or None, representing absence.
When to use
Use to represent initial values that may not yet exist
- Returning from partial functions (not defined for all inputs)
- Managing optional fields in data structures
Namespace containing utility types for Option.
When to use
Use to access type-level helpers associated with Option.
Option<function (type parameter) V in <K, V>(self: MutableHashMap<K, V>, key: K): Option.Option<V>V> => {
if (self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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;
}
MutableHashMap<K, V>.backing: Map<K, V>backing.Map<K, V>.has(key: K): booleanhas(key: Kkey)) {
return import OptionOption.const some: <A>(value: A) => Option<A>Wraps the given value into an Option to represent its presence.
When to use
Use to wrap a known present value as Option
- Returning a successful result from a partial function
Details
- Always returns
Some<A>
- Does not filter
null or undefined; use
fromNullishOr
for that
Example (Wrapping a value)
import { Option } from "effect"
// ┌─── Option<number>
// ▼
const value = Option.some(1)
console.log(value)
// Output: { _id: 'Option', _tag: 'Some', value: 1 }
some(self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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;
}
MutableHashMap<K, V>.backing: Map<K, V>backing.Map<K, V>.get(key: K): V | undefinedReturns a specified element from the Map object. If the value that is associated to the provided key is an object, then you will get a reference to that object and any change made to that object will effectively modify it inside the Map.
get(key: Kkey)!)
} else if (const isSimpleKey: (u: unknown) => booleanisSimpleKey(key: Kkey)) {
return import OptionOption.const none: <A = never>() => Option<A>Creates an Option representing the absence of a value.
When to use
Use to represent a missing or uninitialized value, such as returning "no
result" from a function.
Details
- Returns
Option<never>, which is a subtype of Option<A> for any A
- Always returns the same singleton instance
Example (Creating an empty Option)
import { Option } from "effect"
// ┌─── Option<never>
// ▼
const noValue = Option.none()
console.log(noValue)
// Output: { _id: 'Option', _tag: 'None' }
none()
}
const const refKey: anyrefKey = const referentialKeysCache: WeakMap<
any,
any
>
WeakMap<any, any>.get(key: any): anyget(self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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 refKey: anyrefKey !== var undefinedundefined) {
return self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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;
}
MutableHashMap<K, V>.backing: Map<K, V>backing.Map<K, V>.has(key: K): booleanhas(const refKey: anyrefKey) ? import OptionOption.const some: <A>(value: A) => Option<A>Wraps the given value into an Option to represent its presence.
When to use
Use to wrap a known present value as Option
- Returning a successful result from a partial function
Details
- Always returns
Some<A>
- Does not filter
null or undefined; use
fromNullishOr
for that
Example (Wrapping a value)
import { Option } from "effect"
// ┌─── Option<number>
// ▼
const value = Option.some(1)
console.log(value)
// Output: { _id: 'Option', _tag: 'Some', value: 1 }
some(self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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;
}
MutableHashMap<K, V>.backing: Map<K, V>backing.Map<K, V>.get(key: K): V | undefinedReturns a specified element from the Map object. If the value that is associated to the provided key is an object, then you will get a reference to that object and any change made to that object will effectively modify it inside the Map.
get(const refKey: anyrefKey)!) : import OptionOption.const none: <A = never>() => Option<A>Creates an Option representing the absence of a value.
When to use
Use to represent a missing or uninitialized value, such as returning "no
result" from a function.
Details
- Returns
Option<never>, which is a subtype of Option<A> for any A
- Always returns the same singleton instance
Example (Creating an empty Option)
import { Option } from "effect"
// ┌─── Option<never>
// ▼
const noValue = Option.none()
console.log(noValue)
// Output: { _id: 'Option', _tag: 'None' }
none()
}
const const hash: numberhash = import HashHash.const hash: <K>(self: K) => numberComputes a hash value for any given value.
When to use
Use to compute an Effect hash for primitives, collections, and hashable
objects.
Details
This function can hash primitives (numbers, strings, booleans, etc.) as well as
objects, arrays, and other complex data structures. It automatically handles
different types and provides a consistent hash value for equivalent inputs.
Gotchas
Objects being hashed must be treated as immutable after their first hash
computation. Hash results are cached, so mutating an object after hashing will
lead to stale cached values and broken hash-based operations. For mutable
objects, implement a custom Hash interface that hashes the object reference
rather than its content.
Example (Hashing different values)
import { Hash } from "effect"
// Hash primitive values
console.log(Hash.hash(42)) // numeric hash
console.log(Hash.hash("hello")) // string hash
console.log(Hash.hash(true)) // boolean hash
// Hash objects and arrays
console.log(Hash.hash({ name: "John", age: 30 }))
console.log(Hash.hash([1, 2, 3]))
console.log(Hash.hash({ id: "user-1", roles: ["admin", "editor"] }))
hash(key: Kkey)
const const bucket: [K, ...K[]] | undefinedbucket = self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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;
}
MutableHashMap<K, V>.buckets: Map<number, NonEmptyArray<K>>buckets.Map<number, [K, ...K[]]>.get(key: number): [K, ...K[]] | undefinedReturns a specified element from the Map object. If the value that is associated to the provided key is an object, then you will get a reference to that object and any change made to that object will effectively modify it inside the Map.
get(const hash: numberhash)
if (const bucket: [K, ...K[]] | undefinedbucket === var undefinedundefined) {
return import OptionOption.const none: <A = never>() => Option<A>Creates an Option representing the absence of a value.
When to use
Use to represent a missing or uninitialized value, such as returning "no
result" from a function.
Details
- Returns
Option<never>, which is a subtype of Option<A> for any A
- Always returns the same singleton instance
Example (Creating an empty Option)
import { Option } from "effect"
// ┌─── Option<never>
// ▼
const noValue = Option.none()
console.log(noValue)
// Output: { _id: 'Option', _tag: 'None' }
none()
}
return const getFromBucket: <K, V>(
self: MutableHashMap<K, V>,
bucket: NonEmptyArray<K>,
key: K
) => Option.Option<V>
self: MutableHashMap<K, V>(parameter) self: {
backing: Map<K, V>;
buckets: Map<number, NonEmptyArray<K>>;
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 bucket: [K, ...K[]]const bucket: {
0: K;
length: number;
toString: () => string;
toLocaleString: { (): string; (locales: string | string[], options?: Intl.NumberFormatOptions & Intl.DateTimeFormatOptions): string };
pop: () => K | undefined;
push: (...items: Array<K>) => number;
concat: { (...items: Array<ConcatArray<K>>): Array<K>; (...items: Array<K | ConcatArray<K>>): Array<K> };
join: (separator?: string) => string;
reverse: () => Array<K>;
shift: () => K | undefined;
slice: (start?: number, end?: number) => Array<K>;
sort: (compareFn?: ((a: K, b: K) => number) | undefined) => [K, ...K[]];
splice: { (start: number, deleteCount?: number): Array<K>; (start: number, deleteCount: number, ...items: Array<K>): Array<K> };
unshift: (...items: Array<K>) => number;
indexOf: (searchElement: K, fromIndex?: number) => number;
lastIndexOf: (searchElement: K, fromIndex?: number) => number;
every: { (predicate: (value: K, index: number, array: Array<K>) => value is S, thisArg?: any): this is S[]; (predicate: (value: K, index: number, array: Array<K>) => unknown, thisArg?: any): boolean };
some: (predicate: (value: K, index: number, array: Array<K>) => unknown, thisArg?: any) => boolean;
forEach: (callbackfn: (value: K, index: number, array: Array<K>) => void, thisArg?: any) => void;
map: (callbackfn: (value: K, index: number, array: Array<K>) => U, thisArg?: any) => Array<U>;
filter: { (predicate: (value: K, index: number, array: Array<K>) => value is S, thisArg?: any): Array<S>; (predicate: (value: K, index: number, array: Array<K>) => unknown, thisArg?: any): Array<K> };
reduce: { (callbackfn: (previousValue: K, currentValue: K, currentIndex: number, array: Array<K>) => K): K; (callbackfn: (previousValue: K, currentValue: K, currentIndex: number, array: Array<K>) => K, initialValue: K): K; (callbackfn: (previousVa…;
reduceRight: { (callbackfn: (previousValue: K, currentValue: K, currentIndex: number, array: Array<K>) => K): K; (callbackfn: (previousValue: K, currentValue: K, currentIndex: number, array: Array<K>) => K, initialValue: K): K; (callbackfn: (previousVa…;
find: { (predicate: (value: K, index: number, obj: Array<K>) => value is S, thisArg?: any): S | undefined; (predicate: (value: K, index: number, obj: Array<K>) => unknown, thisArg?: any): K | undefined };
findIndex: (predicate: (value: K, index: number, obj: Array<K>) => unknown, thisArg?: any) => number;
fill: (value: K, start?: number, end?: number) => [K, ...K[]];
copyWithin: (target: number, start: number, end?: number) => [K, ...K[]];
entries: () => ArrayIterator<[number, K]>;
keys: () => ArrayIterator<number>;
values: () => ArrayIterator<K>;
includes: (searchElement: K, fromIndex?: number) => boolean;
flatMap: (callback: (this: This, value: K, index: number, array: Array<K>) => U | ReadonlyArray<U>, thisArg?: This | undefined) => Array<U>;
flat: (this: A, depth?: D | undefined) => Array<FlatArray<A, D>>;
at: (index: number) => K | undefined;
findLast: { (predicate: (value: K, index: number, array: Array<K>) => value is S, thisArg?: any): S | undefined; (predicate: (value: K, index: number, array: Array<K>) => unknown, thisArg?: any): K | undefined };
findLastIndex: (predicate: (value: K, index: number, array: Array<K>) => unknown, thisArg?: any) => number;
toReversed: () => Array<K>;
toSorted: (compareFn?: ((a: K, b: K) => number) | undefined) => Array<K>;
toSpliced: { (start: number, deleteCount: number, ...items: Array<K>): Array<K>; (start: number, deleteCount?: number): Array<K> };
with: (index: number, value: K) => Array<K>;
}
key: Kkey)
})