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luvit-stream
Advanced tools
Stream interface in Luvit
A simple example of Readable
stream in string mode:
local stream = require('..')
local Numbers = stream.Readable:extend()
function Numbers:initialize(count, options)
local opt = options or {}
stream.Readable.initialize(self, opt)
self.current = 1
self.count = count
end
function Numbers:_read()
if self.current > self.count then
self:push(nil)
return
else
self:push(tostring(self.current))
self.current = self.current + 1
end
end
Numbers:new(9):pipe(process.stdout)
A more complex example using object mode with a Readable
stream and two Transform
streams:
local stream = require('..')
local fs = require('fs')
local core = require('core')
local Numbers = stream.Readable:extend()
function Numbers:initialize(count, options)
local opt = options or {}
opt.objectMode = true
stream.Readable.initialize(self, opt)
self.current = 1
self.count = count
end
function Numbers:_read()
if self.current > self.count then
self:push(nil)
return
else
self:push({num = self.current})
self.current = self.current + 1
end
end
local NumberIncreaser = stream.Transform:extend()
function NumberIncreaser:initialize(options)
local opt = options or {}
opt.objectMode = true
stream.Transform.initialize(self, opt)
end
function NumberIncreaser:_transform(data, encoding, callback)
callback(nil, {num = data.num + 1})
end
local Stringify = stream.Transform:extend()
function Stringify:initialize(options)
local opt = options or {}
opt.objectMode = true
stream.Transform.initialize(self, opt)
end
function Stringify:_transform(data, encoding, callback)
if data and data.num then
callback(nil, tostring(data.num))
end
end
Numbers:new(9):pipe(NumberIncreaser:new()):pipe(Stringify:new()):pipe(process.stdout)
FAQs
Streams Library
We found that luvit-stream demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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