cascade-stream

A duplex stream that can lazily create child streams from a chunk and merge all outputs into one

example

var from = require('from2-array')
var through = require('through2')
var cascade = require('cascade-stream')
 
// create a stream for a single letter
function createLetterStream(letter){
    return from.obj([1,2,3].map(function(num){
        return letter + ':' + num
    }))
}
 
var source = from.obj(['a', 'b', 'c'])
 
var pipeline = cascade(function(chunk, add, next){
    add(createLetterStream(chunk))
    next()
})
 
var sink = through.obj(function(chunk, enc, cb){
    console.log(chunk);
    cb()
})
 
source.pipe(pipeline).pipe(sink)
/*
 
    a1
    a2
    a3
    b1
    b2
    b3
    c1
    c2
    c3
    
*/

license

MIT