LongestCommonPrefix

Since 1.4.0

Finds the longest common prefix string among all strings in a tuple.

Signature

export type LongestCommonPrefix<T extends string[]> = T extends [
	infer First extends string,
	...infer Rest extends string[],
]
	? Rest extends [infer Second extends string, ...infer Others extends string[]]
		? LongestCommonPrefix<[CommonPrefix<First, Second>, ...Others]>
		: First
	: ''

Parameters

Parameter	Description
T	A tuple of strings to find the common prefix for

Examples

Basic Usage

import type { LongestCommonPrefix } from 'uni-types'

type Prefix = LongestCommonPrefix<['flower', 'flow', 'flight']> // 'fl'

No Common Prefix

import type { LongestCommonPrefix } from 'uni-types'

type Prefix = LongestCommonPrefix<['dog', 'cat', 'bird']> // ''

Related

• Reverse - Reverse a tuple
• Unique - Remove duplicates from tuple