1. module through2
   1. function through2 (options, transform, flush)
   2. function through2.ctor (options, transform, flush)
   3. function through2.obj (options, transform, flush)

module through2

function through2 (options, transform, flush)

• description and source-code

  through2 = function (options, transform, flush) {
    if (typeof options == 'function') {
      flush     = transform
      transform = options
      options   = {}
    }
  
    if (typeof transform != 'function')
      transform = noop
  
    if (typeof flush != 'function')
      flush = null
  
    return construct(options, transform, flush)
  }

• example usage

  n/a

function through2.ctor (options, transform, flush)

• description and source-code

  ctor = function (options, transform, flush) {
    if (typeof options == 'function') {
      flush     = transform
      transform = options
      options   = {}
    }
  
    if (typeof transform != 'function')
      transform = noop
  
    if (typeof flush != 'function')
      flush = null
  
    return construct(options, transform, flush)
  }

• example usage

  ...
      this.push('tacking on an extra buffer to the end');
      cb();
    }
  ))
  .pipe(fs.createWriteStream('/tmp/wut.txt'));
  ```
  
  <b><code>through2.ctor([ options, ] transformFunction[, flushFunction
   ])</code></b>
  
  Instead of returning a `stream.Transform` instance, `through2.ctor()` returns a **constructor** for a custom Transform. This is
  useful when you want to use the same transform logic in multiple instances.
  
  ```js
  var FToC = through2.ctor({objectMode: true}, function (record, encoding, callback) {
  if (record.temp != null && record.unit == "F") {
    record.temp = ( ( record.temp - 32 ) * 5 ) / 9
  ...

function through2.obj (options, transform, flush)

• description and source-code

  obj = function (options, transform, flush) {
    if (typeof options == 'function') {
      flush     = transform
      transform = options
      options   = {}
    }
  
    if (typeof transform != 'function')
      transform = noop
  
    if (typeof flush != 'function')
      flush = null
  
    return construct(options, transform, flush)
  }

• example usage

  ...
  Or object streams:
  
  ```js
  var all = []
  
  fs.createReadStream('data.csv')
  .pipe(csv2())
  .pipe(through2.obj(function (chunk, enc, callback) {
    var data = {
        name    : chunk[0]
      , address : chunk[3]
      , phone   : chunk[10]
    }
    this.push(data)
  ...