Module bait

the event emitter

Introduction

Bait is the event emitter for Hilbish. Much like Node.js and its events system, many actions in Hilbish emit events. Unlike Node.js, Hilbish events are global. So make sure to pick a unique name!

Usage of the Bait module consists of userstanding event-driven architecture, but it’s pretty simple: If you want to act on a certain event, you can catch it. You can act on events via callback functions.

Examples of this are in the Hilbish default config! Consider this part of it:

bait.catch('command.exit', function(code)
	running = false
	doPrompt(code ~= 0)
	doNotifyPrompt()
end)

What this does is, whenever the command.exit event is thrown, this function will set the user prompt.

Functions


catch(name, cb)	Catches a hook. This function is used to act on hooks/events.
catchOnce(name, cb)	Same as catch, but only runs the `cb` once and then removes the hook
hooks(name) -> table	Returns a table with hooks (callback functions) on the event with `name`.
release(name, catcher)	Removes the `catcher` for the event with `name`.
throw(name, …args)	Throws a hook with `name` with the provided `args`

bait.catch(name, cb)

Catches a hook. This function is used to act on hooks/events.

Parameters

string name
The name of the hook.

function cb
The function that will be called when the hook is thrown.

Example

bait.catch('hilbish.exit', function()
	print 'Goodbye Hilbish!'
end)

bait.catchOnce(name, cb)

Same as catch, but only runs the cb once and then removes the hook

Parameters

This function has no parameters.

bait.hooks(name) -> table

Returns a table with hooks (callback functions) on the event with name.

Parameters

This function has no parameters.

bait.release(name, catcher)

Removes the catcher for the event with name. For this to work, catcher has to be the same function used to catch an event, like one saved to a variable.

Parameters

This function has no parameters.

bait.throw(name, ...args)

Throws a hook with name with the provided args

Parameters

string name
The name of the hook.

any args (This type is variadic. You can pass an infinite amount of parameters with this type.)
The arguments to pass to the hook.