lutil

Utility functions for LFE

Introduction
Dependencies
Installation
Usage
- Modules
- Macros
License

Introduction ↟

lutil offers several modules and macros with convenience functions that can be easily incorporated into projects without having to re-implement these little functions all the time.

lutil also explores new LFE functions and macros that may be of interest to LFE-proper; if they fare well here, we will submit proposals for inclusion.

Note that with the release of 0.14, many deprecated functions and macros that have either been moved into LFE itself or other LFE libraries were removed and are no longer available in the library. The last version with those functions present is 0.13.5.

Dependencies ↟

As of version 0.7.0, this project assumes that you have rebar3 installed somewhere in your $PATH. It no longer uses the old version of rebar. If you do not wish to use rebar3, you may use the most recent rebar2-compatible release of lutil: 0.6.7.

Installation ↟

In your rebar.config file, update your deps section to include lutil:

{deps, [
  {lutil, "0.15.0"}}}
]}

Usage ↟

Modules ↟

For the modules, usage is the same as any other Erlang or LFE library :-)

Some example usage:

> (lutil-math:dot-product '(1 2 3) '(4 5 6))
32

> (lutil-tuple:cat (tuple 1 2) (tuple 3 4))
#(1 2 3 4)
> (lutil-tuple:cat (list (tuple 1 2) (tuple 3 4) (tuple 5 6)))
#(1 2 3 4 5 6)

lfe> (lutil-list:chunks (lists:seq 1 32) 8 #(by-parts))
((1 2 3 4)
 (5 6 7 8)
 (9 10 11 12)
 (13 14 15 16)
 (17 18 19 20)
 (21 22 23 24)
 (25 26 27 28)
 (29 30 31 32))
lfe> (lutil-list:chunks (lists:seq 1 32) 8 #(by-length))
((1 2 3 4 5 6 7 8)
 (9 10 11 12 13 14 15 16)
 (17 18 19 20 21 22 23 24)
 (25 26 27 28 29 30 31 32))

Macros ↟

lutil offers the create-table macro for use with more easily working generating Mnesia tables. Example usage is available here.

If you are looking for the Clojure macros which used to be in lutil, they have an interesting history: they were first moved to their own project, and then added to the LFE stdlib!

License ↟

BSD 3-Clause License

Copyright © 2013-2024, Duncan McGreggor <oubiwann@gmail.com>
Copyright © 2016, Eric Bailey <eric@ericb.me>
Copyright © 2015, arpunk <arpunk@cryptolab.net>
                  osense <krupicka.adam@gmail.com>
Copyright © 2014, Torbjorn Tornkvist <kruskakli@gmail.com>
                  Døkkarr Hirðisson <dokkarr@lfe.io>
                  Dreki Þórgísl <dreki@billo.systems>\
Copyright © 2009, Tim Dysinger <tim@dysinger.net>