effect-io-ai

Package: effect
Module: Array

Array.differenceWith

Computes elements in the first array that are not in the second, using a custom equivalence.

When to use

Use when you need to keep only values from the first array and equality must be defined by a custom comparator, such as matching objects by id.

Example (Computing differences with custom equality)

import { Array } from "effect"

const diff = Array.differenceWith<number>((a, b) => a === b)([1, 2, 3], [2, 3, 4])
console.log(diff) // [1]

See

• difference for the Equal.equivalence() variant
• unionWith for keeping values from either array with custom equality
• intersectionWith for keeping values present in both arrays with custom equality

Signature

declare const differenceWith: <A>(isEquivalent: (self: A, that: A) => boolean) => { (that: Iterable<A>): (self: Iterable<A>) => Array<A>; (self: Iterable<A>, that: Iterable<A>): Array<A>; }

Source

Since v2.0.0