https://github.com/moteus/lua-EventEmitter

Implement EventEmitter on Lua
https://github.com/moteus/lua-EventEmitter

event-emitter lua

Last synced: 3 months ago
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Implement EventEmitter on Lua

• Host: GitHub
• URL: https://github.com/moteus/lua-EventEmitter
• Owner: moteus
• License: mit
• Created: 2016-05-12T15:23:01.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2021-01-07T19:55:01.000Z (almost 4 years ago)
• Last Synced: 2024-05-22T17:30:38.625Z (6 months ago)
• Topics: event-emitter, lua
• Language: Lua
• Size: 35.2 KB
• Stars: 8
• Watchers: 2
• Forks: 6
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# lua-EventEmitter

[![Build Status](https://travis-ci.org/moteus/lua-EventEmitter.svg?branch=master)](https://travis-ci.org/moteus/lua-EventEmitter)

[![Coverage Status](https://coveralls.io/repos/github/moteus/lua-EventEmitter/badge.svg?branch=master)](https://coveralls.io/github/moteus/lua-EventEmitter?branch=master)

[![License](http://img.shields.io/badge/License-MIT-brightgreen.svg)](LICENSE)

Implementation of EventEmitter for Lua.

### Extend 30log class

```Lua

local EE    = require "EventEmitter"

local class = require "30log"

-- Create wrapper for EventEmitter

local EventEmitter = EE.extend(class('EventEmitter')) do

function EventEmitter:init()

  -- object by default should have `_EventEmitter` property

  self._EventEmitter = EE.EventEmitter.new{self = self}

end

end

local Window = EventEmitter:extend('Window')

local window = Window:new()

window:on('resize', function(self, event, w, h)

  print(self, ("Resized %dx%d"):format(w, h))

end)

window:emit('resize', 125, 250)

```

### Wrap some table with emitter

```Lua

local EventEmitter = require "EventEmitter"

local server = {}

EventEmitter.extend_object(server)

server:on('accept', function() ... end)

server:emit('accept', host, port)

```

## Incompatabilities with [EventEmitter2](https://github.com/asyncly/EventEmitter2)

1. Lua version has no defined order of call listners

2. JS Allow register same function for same event multiple times.

```JS

server.on('A', test);

server.on('A', test);

server.emit('A')       // `test` called twice

```

3. If event has wildcard followed by some value then mult-level wildcard does not works

```JS

server.on('foo.**', test);

server.emit('foo.*')       // called

server.emit('foo.*.bar')   // not called

```

4. In JS Multi-level key in middle of mask does not allo zero match with wildcard event.

```JS

server.on('foo.**.bar', test);

server.emit('foo.*')   // not called

server.emit('foo.bar') // called

```