Flatten

Since 1.4.0

Flattens a nested tuple by one level, concatenating all inner arrays into a single tuple.

Signature

export type Flatten<T extends unknown[][], Acc extends unknown[] = []> = T extends [
	infer First extends unknown[],
	...infer Rest extends unknown[][],
]
	? Flatten<Rest, [...Acc, ...First]>
	: Acc

Parameters

Parameter	Description
T	A tuple of arrays to flatten (one level)
Acc	Internal accumulator for building the result (default: [])

Examples

Basic Usage

import type { Flatten } from 'uni-types'

type Result = Flatten<[[1, 2], [3, 4], [5, 6]]> // [1, 2, 3, 4, 5, 6]

With Mixed Length Arrays

import type { Flatten } from 'uni-types'

type Result = Flatten<[['a'], ['b', 'c'], ['d', 'e', 'f']]> // ['a', 'b', 'c', 'd', 'e', 'f']

Related

• FlattenDeep - Flatten nested tuple (deep)
• Reverse - Reverse a tuple
• Unique - Remove duplicates from tuple