effect-io-ai

Package: effect
Module: MutableList

MutableList.prepend

Prepends an element to the beginning of the MutableList. This operation is optimized for high-frequency usage.

Example (Prepending elements)

import { MutableList } from "effect"

const list = MutableList.make<string>()

// Prepend elements (they'll be at the front)
MutableList.prepend(list, "third")
MutableList.prepend(list, "second")
MutableList.prepend(list, "first")

console.log(list.length) // 3

// Elements taken from head (most recently prepended first)
console.log(MutableList.take(list)) // "first"
console.log(MutableList.take(list)) // "second"
console.log(MutableList.take(list)) // "third"

// Use case: priority items or stack-like behavior
MutableList.append(list, "normal")
MutableList.prepend(list, "priority") // This will be taken first
console.log(MutableList.take(list)) // "priority"

Signature

declare const prepend: <A>(self: MutableList<A>, message: A) => void

Source

Since v2.0.0