flatmap for pull-streams
map an input to an array, but the items in those arrays become the stream. so you can use this module to make expanding or contracting streams.
taken from example on introduction to pull-streams
var pull = require('pull-stream')
pull(
pull.values([1,2,3]),
flatmap(function (n) {
//return an array of n n's [2,2] or [3,3,3], etc
return new Array(n).map(function () { return n })
}),
pull.collect(function (err, ary) {
if(err) throw err
console.log(ary)
})
)output:
[1, 2, 2, 3, 3, 3]
MIT