1. if you check chunk for null before printing, everything is working fine.
readable.on("readable", function () { var chunk = readable.read();
console.log(chunk != null ? chunk.toString() : 'null') })
2. you could read on a single event till null.
readable.on("readable", function () { var chunk; while ( (chunk =
readable.read()) != null) console.log(chunk.toString()) })
chunk == null tells you, that the buffer of the stream is empty now and you
should wait till the next 'readable' or the 'end'
Am Freitag, 6. September 2013 03:35:57 UTC+2 schrieb Oscar Torrente Artero:
>
> I mean...this code works perfectly:
>
> var fs = require("fs")
> var readable = fs.createReadStream("file.txt")
> readable.on("end", function () { console.log("End") })
> readable.on("error", function (err) { console.log(err) })
> readable.on("readable", function () { var chunk = readable.read();
> console.log(chunk.toString()) })
>
> But this not:
>
> var fs = require("fs")
> var readable = fs.createReadStream("file.txt", {start:0, end:1})
> readable.on("end", function () { console.log("End") })
> readable.on("error", function (err) { console.log(err) })
> readable.on("readable", function () { var chunk = readable.read();
> console.log(chunk.toString()) })
>
> I see two related problems:
> -It seems "readable" event is emitted twice (why??!!)
> -As a consequenca, the second time "readable" event is emitted,
> chunk is null because there's nothing to read, so method toString()
> crashes. I thought that just after the first time "readable" event is
> emitted, then the "end" event would be emitted too, but it doesn't.
>
> I'm sure I am doing something wrong, but I really can't see it.
>
> Thanks a lot
>
>
--
--
Job Board: http://jobs.nodejs.org/
Posting guidelines:
https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines
You received this message because you are subscribed to the Google
Groups "nodejs" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/nodejs?hl=en?hl=en
---
You received this message because you are subscribed to the Google Groups
"nodejs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/groups/opt_out.
