effect-io-ai

Package: effect
Module: MutableHashMap

MutableHashMap.fromIterable

Creates a MutableHashMap from an iterable collection of key-value pairs.

When to use

Use to create a mutable hash map from an existing iterable of entries.

Example (Creating a map from an iterable)

import { MutableHashMap } from "effect"

const entries = [
  ["apple", 1],
  ["banana", 2],
  ["cherry", 3]
] as const

const map = MutableHashMap.fromIterable(entries)

console.log(MutableHashMap.get(map, "banana")) // Some(2)
console.log(MutableHashMap.size(map)) // 3

// Works with any iterable
const fromMap = MutableHashMap.fromIterable(new Map([["x", 10], ["y", 20]]))
console.log(MutableHashMap.get(fromMap, "x")) // Some(10)

See

• make for creating a map from explicit entries
• empty for creating an empty map

Signature

declare const fromIterable: <K, V>(entries: Iterable<readonly [K, V]>) => MutableHashMap<K, V>

Source

Since v2.0.0