https://github.com/virgo-agent-toolkit/luvit-stream

Stream interface in Luvit - this is now in Luvit core
https://github.com/virgo-agent-toolkit/luvit-stream

Last synced: 3 months ago
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Stream interface in Luvit - this is now in Luvit core

• Host: GitHub
• URL: https://github.com/virgo-agent-toolkit/luvit-stream
• Owner: virgo-agent-toolkit
• License: apache-2.0
• Created: 2014-05-29T19:12:32.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-08-16T02:43:09.000Z (about 10 years ago)
• Last Synced: 2024-04-13T22:04:15.708Z (7 months ago)
• Language: Lua
• Homepage:
• Size: 742 KB
• Stars: 6
• Watchers: 14
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
luvit-stream

============

Stream interface in Luvit

## Examples

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)

```