<A, V, K>(f: (value: V, key: K) => A): (
self: HashMap<K, V>
) => HashMap<K, A>
<K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>Maps over the entries of the HashMap using the specified function.
Example (Mapping values)
import { HashMap } from "effect"
const map1 = HashMap.make(["a", 1], ["b", 2], ["c", 3])
const map2 = HashMap.map(map1, (value, key) => `${key}:${value * 2}`)
console.log(HashMap.get(map2, "a")) // Option.some("a:2")
console.log(HashMap.get(map2, "b")) // Option.some("b:4")mapping
Source effect/HashMap.ts:10094 lines
export const const map: {
<A, V, K>(f: (value: V, key: K) => A): (
self: HashMap<K, V>
) => HashMap<K, A>
<K, V, A>(
self: HashMap<K, V>,
f: (value: V, key: K) => A
): HashMap<K, A>
}
Maps over the entries of the HashMap using the specified function.
Example (Mapping values)
import { HashMap } from "effect"
const map1 = HashMap.make(["a", 1], ["b", 2], ["c", 3])
const map2 = HashMap.map(map1, (value, key) => `${key}:${value * 2}`)
console.log(HashMap.get(map2, "a")) // Option.some("a:2")
console.log(HashMap.get(map2, "b")) // Option.some("b:4")
map: {
<function (type parameter) A in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>A, function (type parameter) V in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>V, function (type parameter) K in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>K>(f: (value: V, key: K) => Af: (value: Vvalue: function (type parameter) V in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>V, key: Kkey: function (type parameter) K in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>K) => function (type parameter) A in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>A): (self: HashMap<K, V>(parameter) self: {
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 HashMap<out Key, out Value>A HashMap is an immutable key-value data structure that provides efficient lookup,
insertion, and deletion operations. It uses a Hash Array Mapped Trie (HAMT) internally
for structural sharing and optimal performance.
Example (Using basic HashMap operations)
import { HashMap } from "effect"
// Create a HashMap
const map = HashMap.make(["a", 1], ["b", 2], ["c", 3])
// Access values
const valueA = HashMap.get(map, "a") // Option.some(1)
const valueD = HashMap.get(map, "d") // Option.none()
// Check if key exists
console.log(HashMap.has(map, "b")) // true
// Add/update values (returns new HashMap)
const updated = HashMap.set(map, "d", 4)
console.log(HashMap.size(updated)) // 4
The HashMap namespace contains type-level utilities and helper types
for working with HashMap instances.
Example (Extracting HashMap types)
import { HashMap } from "effect"
// Create a concrete HashMap for type extraction
const inventory = HashMap.make(
["laptop", { quantity: 5, price: 999 }],
["mouse", { quantity: 20, price: 29 }]
)
// Extract types for reuse
type ProductId = HashMap.HashMap.Key<typeof inventory> // string
type Product = HashMap.HashMap.Value<typeof inventory> // { quantity: number, price: number }
type InventoryEntry = HashMap.HashMap.Entry<typeof inventory> // [string, Product]
// Use extracted types in functions
const updateInventory = (id: ProductId, product: Product) =>
HashMap.set(inventory, id, product)
const processEntry = ([id, product]: InventoryEntry) =>
`${id}: ${product.quantity} @ $${product.price}`
// Example of extracted types in action
const newProduct: Product = { quantity: 10, price: 199 }
const updatedInventory = updateInventory("tablet", newProduct)
HashMap<function (type parameter) K in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>K, function (type parameter) V in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>V>) => interface HashMap<out Key, out Value>A HashMap is an immutable key-value data structure that provides efficient lookup,
insertion, and deletion operations. It uses a Hash Array Mapped Trie (HAMT) internally
for structural sharing and optimal performance.
Example (Using basic HashMap operations)
import { HashMap } from "effect"
// Create a HashMap
const map = HashMap.make(["a", 1], ["b", 2], ["c", 3])
// Access values
const valueA = HashMap.get(map, "a") // Option.some(1)
const valueD = HashMap.get(map, "d") // Option.none()
// Check if key exists
console.log(HashMap.has(map, "b")) // true
// Add/update values (returns new HashMap)
const updated = HashMap.set(map, "d", 4)
console.log(HashMap.size(updated)) // 4
The HashMap namespace contains type-level utilities and helper types
for working with HashMap instances.
Example (Extracting HashMap types)
import { HashMap } from "effect"
// Create a concrete HashMap for type extraction
const inventory = HashMap.make(
["laptop", { quantity: 5, price: 999 }],
["mouse", { quantity: 20, price: 29 }]
)
// Extract types for reuse
type ProductId = HashMap.HashMap.Key<typeof inventory> // string
type Product = HashMap.HashMap.Value<typeof inventory> // { quantity: number, price: number }
type InventoryEntry = HashMap.HashMap.Entry<typeof inventory> // [string, Product]
// Use extracted types in functions
const updateInventory = (id: ProductId, product: Product) =>
HashMap.set(inventory, id, product)
const processEntry = ([id, product]: InventoryEntry) =>
`${id}: ${product.quantity} @ $${product.price}`
// Example of extracted types in action
const newProduct: Product = { quantity: 10, price: 199 }
const updatedInventory = updateInventory("tablet", newProduct)
HashMap<function (type parameter) K in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>K, function (type parameter) A in <A, V, K>(f: (value: V, key: K) => A): (self: HashMap<K, V>) => HashMap<K, A>A>
<function (type parameter) K in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>K, function (type parameter) V in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>V, function (type parameter) A in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>A>(self: HashMap<K, V>(parameter) self: {
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 HashMap<out Key, out Value>A HashMap is an immutable key-value data structure that provides efficient lookup,
insertion, and deletion operations. It uses a Hash Array Mapped Trie (HAMT) internally
for structural sharing and optimal performance.
Example (Using basic HashMap operations)
import { HashMap } from "effect"
// Create a HashMap
const map = HashMap.make(["a", 1], ["b", 2], ["c", 3])
// Access values
const valueA = HashMap.get(map, "a") // Option.some(1)
const valueD = HashMap.get(map, "d") // Option.none()
// Check if key exists
console.log(HashMap.has(map, "b")) // true
// Add/update values (returns new HashMap)
const updated = HashMap.set(map, "d", 4)
console.log(HashMap.size(updated)) // 4
The HashMap namespace contains type-level utilities and helper types
for working with HashMap instances.
Example (Extracting HashMap types)
import { HashMap } from "effect"
// Create a concrete HashMap for type extraction
const inventory = HashMap.make(
["laptop", { quantity: 5, price: 999 }],
["mouse", { quantity: 20, price: 29 }]
)
// Extract types for reuse
type ProductId = HashMap.HashMap.Key<typeof inventory> // string
type Product = HashMap.HashMap.Value<typeof inventory> // { quantity: number, price: number }
type InventoryEntry = HashMap.HashMap.Entry<typeof inventory> // [string, Product]
// Use extracted types in functions
const updateInventory = (id: ProductId, product: Product) =>
HashMap.set(inventory, id, product)
const processEntry = ([id, product]: InventoryEntry) =>
`${id}: ${product.quantity} @ $${product.price}`
// Example of extracted types in action
const newProduct: Product = { quantity: 10, price: 199 }
const updatedInventory = updateInventory("tablet", newProduct)
HashMap<function (type parameter) K in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>K, function (type parameter) V in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>V>, f: (value: V, key: K) => Af: (value: Vvalue: function (type parameter) V in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>V, key: Kkey: function (type parameter) K in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>K) => function (type parameter) A in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>A): interface HashMap<out Key, out Value>A HashMap is an immutable key-value data structure that provides efficient lookup,
insertion, and deletion operations. It uses a Hash Array Mapped Trie (HAMT) internally
for structural sharing and optimal performance.
Example (Using basic HashMap operations)
import { HashMap } from "effect"
// Create a HashMap
const map = HashMap.make(["a", 1], ["b", 2], ["c", 3])
// Access values
const valueA = HashMap.get(map, "a") // Option.some(1)
const valueD = HashMap.get(map, "d") // Option.none()
// Check if key exists
console.log(HashMap.has(map, "b")) // true
// Add/update values (returns new HashMap)
const updated = HashMap.set(map, "d", 4)
console.log(HashMap.size(updated)) // 4
The HashMap namespace contains type-level utilities and helper types
for working with HashMap instances.
Example (Extracting HashMap types)
import { HashMap } from "effect"
// Create a concrete HashMap for type extraction
const inventory = HashMap.make(
["laptop", { quantity: 5, price: 999 }],
["mouse", { quantity: 20, price: 29 }]
)
// Extract types for reuse
type ProductId = HashMap.HashMap.Key<typeof inventory> // string
type Product = HashMap.HashMap.Value<typeof inventory> // { quantity: number, price: number }
type InventoryEntry = HashMap.HashMap.Entry<typeof inventory> // [string, Product]
// Use extracted types in functions
const updateInventory = (id: ProductId, product: Product) =>
HashMap.set(inventory, id, product)
const processEntry = ([id, product]: InventoryEntry) =>
`${id}: ${product.quantity} @ $${product.price}`
// Example of extracted types in action
const newProduct: Product = { quantity: 10, price: 199 }
const updatedInventory = updateInventory("tablet", newProduct)
HashMap<function (type parameter) K in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>K, function (type parameter) A in <K, V, A>(self: HashMap<K, V>, f: (value: V, key: K) => A): HashMap<K, A>A>
} = import internalinternal.const map: anymapReferenced by 1 symbols