relude-0.6.0.0: Custom prelude from Kowainik
Copyright(c) 2016 Stephen Diehl
(c) 2016-2018 Serokell
(c) 2018-2019 Kowainik
LicenseMIT
MaintainerKowainik <xrom.xkov@gmail.com>
Safe HaskellTrustworthy
LanguageHaskell2010

Relude.List

Description

Utility functions to work with lists.

Synopsis

Documentation

module Relude.List.NonEmpty

module Relude.List.Reexport

(!!?) :: [a] -> Int -> Maybe a infix 9 Source #

Safer version of !!, returns a Maybe. get element from list using index value starting from `0`.

>>> [] !!? 0
Nothing

>>> ["a", "b", "c"] !!? 3
Nothing

>>> [1, 2, 3] !!? (-1)
Nothing

>>> ["a", "b", "c"] !!? 2
Just "c"

Since: 0.6.0.0