sortee: Generate string for sort key
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- sortee-0.1.0.1.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
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| Versions [RSS] | 0.1.0.0, 0.1.0.1 |
|---|---|
| Change log | ChangeLog.md |
| Dependencies | base (>=4.7 && <5) [details] |
| License | GPL-3.0-only |
| Copyright | 2019 b123400 |
| Author | b123400 |
| Maintainer | i@b123400.net |
| Category | Sorting |
| Home page | https://github.com/b123400/sortee#readme |
| Bug tracker | https://github.com/b123400/sortee/issues |
| Source repo | head: git clone https://github.com/b123400/sortee |
| Uploaded | by b123400 at 2019-07-09T08:13:27Z |
| Distributions | NixOS:0.1.0.1 |
| Downloads | 964 total (17 in the last 30 days) |
| Rating | (no votes yet) [estimated by Bayesian average] |
| Your Rating | |
| Status | Docs available [build log] Last success reported on 2019-07-09 [all 1 reports] |
Readme for sortee-0.1.0.1
[back to package description]Sortee
A library for creating sort key, inspired by Jira's Lexorank.
Motivation
To represent an ordered list in database, the simplest way is to assign an integer to each row. The problem though is, reordering requires updating multiple rows. Sorting by string can overcome this problem, Sortee provides a function that generates strings for sorting.
Usage
Let's say you have 3 rows, with "a" "c" "t" as sort key. To move "t" to the middle of the list, you can get the new sort key by:
between "a" "c" -- "b"
If you do not have a lower / upper reference, pass Nothing:
between Nothing "9" -- "4"
between "q" Nothing -- "v"
When there is no "space" between keys, Sortee increases the length of the string.
between "h" "i" == Sortee "hU"
between Nothing "1" == Sortee "0U"
Limitations
Not every possible input is valid.
between Nothing "0" -- Nothing
between "b" "b" -- Nothing
between "b" "b0" -- Nothing