| Copyright | (c) Felpe Santa-Cruz 2021 |
|---|---|
| License | BSD3 |
| Maintainer | fesanmar@gmail.com |
| Stability | stable |
| Portability | POSIX |
| Safe Haskell | Safe-Inferred |
| Language | Haskell2010 |
Data.List.Scroll
Description
This module provides functions for relocate an item within a list.
Documentation
up :: Int -> Int -> [a] -> [a] Source #
The up function moves an element n positions to
the beginning of a list. If the index provided is out
of range, the list is returned without any modification.
On the other hand, extra steps will be ignored.
Some examples are given below:
>>>up 2 2 ["one", "two", "three"]["three", "one", "two"]
>>>up 4 1 ["one", "two", "three"]["one", "two", "three"]
>>>up 2 3 ["one", "two", "three"]["three", "one", "two"]
down :: Int -> Int -> [a] -> [a] Source #
The down function moves an element n positions to
the end of a list. If the index provided is out of range,
the list is returned without any modification. On the other
hand, extra steps will be ignored.
Some examples are given below:
>>>down 0 1 ["one", "two", "three"]["two", "one", "three"]
>>>down 4 1 ["one", "two", "three"]["one", "two", "three"]
>>>down 0 4 ["one", "two", "three"]["two", "three", "one"]
deleteByIndex :: Int -> [a] -> [a] Source #
The deleteByIndex function removes an element
from a list by its position within it. For example,
>>>deleteByIndex 1 ["one", "two", "three"]["one", "three"]
If index is out of range, the list will be returned with no changes. For example:
>>>deleteByIndex 3 ["one", "two", "three"]["one", "two", "three"]