Streams are the better abstraction for that.
Notice that with the streams version you can actually start writing to the
disk once you've successfully loaded a single file.
```
var chain = require("chain-stream")
, fs = require("fs")
, DirStream = require("dir-stream") // to be written
, d = require("domain").create()
d.run(function () {
chain(DirStream(__dirname))
.filter(function (fileName) {
return (file.slice(-3) === ".js" && (file !== "lib.js"))
})
.map(readFile)
.pipe(fs.createWriteStream(__dirname + "/lib.js"))
})
d.on("error", function ignoreIt() {})
```
On Wed, Oct 3, 2012 at 1:11 AM, Mariusz Nowak <mari...@medikoo.com> wrote:
> Raynos, I have a feeling that you are comparing apples and oranges.
> Streams are awesome, Promises are awesome but it's not the same, and not
> every use case can be addressed on equal level by both of them.
>
> From my experience there can be promises that are also a streams, but
> among them are also promises that fulfill before stream ends. There can
> also be promises that are not streams, of course you may represent them as
> stream but if they bring no value and just emit 'end', it doesn't fit well
> stream concept, does it?
>
> Same way you can just use callbacks instead of promises, but the point is
> that promises gives you better abstraction, so it's easier to construct
> complicated flow with it and maintain it. See this:
> https://github.com/medikoo/deferred#promises-approach How would you write
> it with streams instead? Would it be more friendly than callbacks version:
> https://github.com/medikoo/deferred#plain-nodejs ?
>
> On Wednesday, October 3, 2012 6:40:02 AM UTC+2, Raynos wrote:
>>
>> https://github.com/Raynos/**promise-stream<https://github.com/Raynos/promise-stream>
>>
>> If you want to turn a stream into a promise you can.
>>
>> This mainly illustrates how streams and promises are similar for those
>> that like promises.
>>
>> It also shows a comparison between how you flow async code through
>> promises and streams
>>
>> --
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