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| <pkrumins> | that person who joined earlier with nickname PeterKrumins wasn't me |
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| <pkrumins> | someone is stalking me |
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| <mbalho> | pkrumins: did you get their IP? |
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| <rch> | 37.106.79.4 |
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| <mbalho> | rch: howd you do that! |
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| <rch> | logs! |
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| <mbalho> | rch: does freenode have a log search api? or do you have your own |
| 00:54:14
| <rch> | heh, i'm using weechat |
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| <rch> | i hope to god freenode isn't logging all our channels |
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| <mbalho> | lol |
| 00:55:08
| <rch> | hey what thread were you and st_luke talking about earlier |
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| <rch> | nodejs goog group? |
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| <mbalho> | today? dont remember |
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| <rch> | oh well |
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| <Raynos> | isaacs: how should you open a conf talk in terms of saying who you are? |
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| <Raynos> | isaacs: I have a feeling mentioning my github / twitter is useful to allow people to reach out after talk with questions / discussions asynchronously |
| 02:52:18
| <mbalho> | Raynos: put @Raynos on your first and last slide |
| 02:52:40
| <Raynos> | should I mention my name using voice or should it just be in text? |
| 02:52:50
| <Raynos> | I genuinely dont know what correct ettiquitte is |
| 02:53:47
| <mbalho> | most people use their real names and mention their online names via slides or as a side remark |
| 02:55:22
| <Raynos> | that makes sense |
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| <dominictarr> | chrisdickinson: hey, is there a good way to look at git objects (like trees and commits) and detect their type, compared to arbitary binary data? |
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| <hij1nx> | pkrumins: could node-image be used to add an arbitrary string as a header to an image without destroying the image? |
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| <pkrumins> | hij1nx, not really, node-image just unifies node-{png,gif,jpeg} |
| 16:11:52
| <pkrumins> | hij1nx, unfortunately you would neither be able to do that with those other libs because they only support writing the images and not reading them |
| 16:12:15
| <pkrumins> | hij1nx, however if someone added a read interface, that would be possible without destroying the image. |
| 16:22:46
| <hij1nx> | pkrumins: i've put together some hacky code for reading file and finding the `tEXt` field, as i understand it, this can hold multiple key/value pairs with each having up to 79 bytes |
| 16:23:45
| <hij1nx> | pkrumins: i need to encode it back again after adding the data, not sure if just "reversing" the process will work |
| 16:25:35
| <pkrumins> | which image format is that? |
| 16:28:00
| <hij1nx> | pkrumins: png, but... i dont know a lot about programming with png files |
| 16:29:45
| <pkrumins> | neither do i, i simply used libpng :) |
| 16:29:52
| <hij1nx> | pkrumins: what im thinking is that it might bork the file to add the new bytes, im sure there is a header that states the length of the file? |
| 16:30:56
| <hij1nx> | pkrumins: ok, let me go a little higher level, i want to embed some text into an image, thats all, not like steganography, just simply add it to the file |
| 16:31:17
| <hij1nx> | add it and then read it |
| 16:31:28
| <hij1nx> | seems like there should be some kind of cave man hack |
| 16:31:33
| <pkrumins> | looking up how the png header |
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| <pkrumins> | hij1nx: it's safe to add bytes, the header doesnt state the length of the whole file. |
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| 16:38:28
| <pkrumins> | hij1nx: it looks like you could just add the tEXt field at the end of the file |
| 16:38:46
| <pkrumins> | hij1nx: the png image contains of chunks, where each chunk has its own header with its size |
| 16:40:19
| <hij1nx> | pkrumins: crazy |
| 16:40:40
| <hij1nx> | pkrumins: i just concat'd a buffer to the end of the file and i can still view the file normally, and view the text!!! |
| 16:41:08
| <hij1nx> | \o\|o|/o/ |
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| <pkrumins> | hij1nx: awesome! |
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| <chrisdickinson> | dominictarr: depending on where the commits are located: node -e 'process.stdin.pipe(require("zlib").createInflate()).pipe(process.stdout)' < html/.git/objects/1a/e5447f0cec3b65dd919fc8137a15a8ec41a6b4 | head -n 1 |
| 16:57:22
| <chrisdickinson> | (ignoring the path specific parts) |
| 16:57:28
| <chrisdickinson> | those are only for loose objects though |
| 16:57:31
| <chrisdickinson> | vs. packed objects |
| 16:57:51
| <chrisdickinson> | in what context are you looking at git objects? over a readable stream? or on the filesystem? |
| 16:57:56
| <dominictarr> | chrisdickinson: thanks, I figured it out |
| 16:58:09
| <dominictarr> | except i used .createUnzip() |
| 16:58:12
| <dominictarr> | which also worked |
| 16:59:22
| <chrisdickinson> | ah cool, yeah -- it's just deflated data |
| 16:59:36
| <chrisdickinson> | (at least if it's loose objects -- packed objects are slightly more complicated) |
| 16:59:41
| <dominictarr> | chrisdickinson: it's for the cyphernet project, which is much like git, but trees of arbitary objects |
| 16:59:57
| <dominictarr> | that are linked to each other by containing hashes like in git |
| 17:00:04
| * chrisdickinson | nods |
| 17:00:16
| <dominictarr> | github.com/dominictarr/cyphernet |
| 17:00:23
| <dominictarr> | https://github.com/dominictarr/cyphernet |
| 17:00:42
| <chrisdickinson> | neat! |
| 17:03:35
| <dominictarr> | mirkok: hey, I have a question about smalltalk |
| 17:03:42
| <dominictarr> | how does the module system work? |
| 17:03:59
| <dominictarr> | does it use a classpath like thing or can modules be nested like in node? |
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| <dominictarr> | mirkok: okay, reading… it's all about Classes, hmm, looks like the classes are global? |
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| 17:33:25
| <dominictarr> | isaacs: hey, when did you start working on npm? |
| 17:34:57
| <jez0990_> | dominictarr: https://github.com/isaacs/npm/commits/master?page=122 |
| 17:36:06
| <dominictarr> | jez0990_: thanks |
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| 17:46:14
| <isaacs> | dominictarr: * 4626dfa isaacs Initial drop. Ugly, sketchy, and not even yet quite a "work in progress". (3 years, 11 months ago) |
| 17:46:29
| <isaacs> | dominictarr: i think the actual work started a few months before that |
| 17:46:59
| <isaacs> | dominictarr: and part of it was adapted from a bash script that i'd written for installing yinst packages, pre-node |
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| <isaacs> | dominictarr: so, really, i started working on npm, without realizing it, probablyaround 2006 or 2007 |
| 17:47:42
| <rch> | heh, urf yinst |
| 17:47:46
| <isaacs> | but it wasn't called "npm" until september 2009 |
| 17:48:12
| <dominictarr> | at what point could you install a node module with it? |
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| 17:55:29
| <isaacs> | dominictarr: well, i think even with that initial drop, you could, but it relied on a `npm-data` git repo which had a bigass json file of every module |
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| 17:56:55
| <dominictarr> | right |
| 17:57:23
| <dominictarr> | isaacs: when did it get the couchdb? |
| 17:57:32
| <dominictarr> | mikeal was responsible for that, right? |
| 18:00:31
| <isaacs> | yeah, that was mikeal's |
| 18:00:41
| <isaacs> | * f7f5c93 Mikeal Rogers Initial code. (3 years, 7 months ago) |
| 18:01:00
| <isaacs> | commit f7f5c93add620b313a150e04336f1cef6ed5c116 |
| 18:01:01
| <isaacs> | Author: Mikeal Rogers <mikeal.rogers@gmail.com> |
| 18:01:01
| <isaacs> | Date: Fri Feb 19 17:06:36 2010 -0800 |
| 18:01:01
| <isaacs> | Initial code. |
| 18:01:27
| <dominictarr> | isaacs: do you still have the data-npm repo? |
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| 18:04:41
| <isaacs> | nah |
| 18:04:44
| <isaacs> | it didn't last long |
| 18:05:04
| <isaacs> | i think 0.0.5 or 0.0.6 was the first npm where you could publish to the registry, and then install from the registry |
| 18:05:08
| <isaacs> | there were no user accounts. |
| 18:05:12
| <isaacs> | it was all just the honor system :) |
| 18:07:11
| <dominictarr> | isaacs: haha, nice |
| 18:07:38
| <dominictarr> | did you upgrade those modules to having maintainers later? |
| 18:08:35
| <isaacs> | yeah |
| 18:08:37
| <isaacs> | i took them over |
| 18:08:51
| <isaacs> | or deleted a lot of them, since none of them worked anyway |
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| 18:10:30
| <dominictarr> | isaacs: right. you mentioned that you made pull requests to modules to add package.jsons? when was that? |
| 18:10:47
| <dominictarr> | do you remember any projects that are still used that you added a package.json to? |
| 18:12:03
| <isaacs> | hmmm.... |
| 18:16:29
| <isaacs> | dominictarr: here's one: https://npmjs.org/package/ndb https://github.com/isaacs/ndb/commit/880020e3f7d448a28ffa5d4c470277d01b2aa8a3 |
| 18:17:34
| <isaacs> | oh, and jake, i did the original package.json for that |
| 18:17:38
| <isaacs> | that ones actually popular |
| 18:18:40
| <isaacs> | dominictarr: https://github.com/mde/jake/commit/8b8be31685edc88215ed4f7d1fadace2942520d8 |
| 18:19:08
| <isaacs> | dominictarr: node-ncurses: https://github.com/isaacs/node-ncurses/commit/b6ee5ec766bf696ea728786de8773872d35ed026 |
| 18:19:58
| <isaacs> | dominictarr: node-solr: https://github.com/isaacs/node-solr/commit/fe2c98de9c168e2477f2de0b537e7c610d9c5aab |
| 18:20:12
| * isaacs | going through list of github repos, looking for ones that i don't use or remember writing |
| 18:20:54
| <isaacs> | dominictarr: node-xml https://github.com/isaacs/node-xml/commit/fe3350879f0ac93a84a001f6437ca5bd661742e8 |
| 18:28:16
| <dominictarr> | isaacs: thanks |
| 18:28:58
| <dominictarr> | this one is the best https://github.com/smtlaissezfaire/ndb/pull/5 |
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| <jcrugzz> | substack: substack.net is down |
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| <shama> | Anyone familiar with getting "Error: spawn ENOENT" when running testling locally? I have browserify/testling installed globally and running $ testling on this branch: https://github.com/maxogden/level.js/pull/18 |
| 19:19:34
| <jesusabdullah> | http://arcticfibre.com/ wat |
| 19:21:15
| <Raynos> | https://idea.popcount.org/2013-09-05-it-aint-about-the-callbacks/ |
| 19:21:32
| <Raynos> | ^ is that basically "we are reading & writing in parallel for efficienciy and have to buffer more?" |
| 19:22:54
| <jesusabdullah> | To me it looks like, "callbacks vs promises is stupid when we have streams to argue about" |
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| 19:24:19
| <Raynos> | well hes talking about pull vs push |
| 19:24:34
| <Raynos> | and im curious how you can make the buffering (2) better |
| 19:25:45
| <jesusabdullah> | I mean, isn't that just backpressure 101? |
| 19:25:59
| <jez0990_> | shama: have you tried `killall node`? |
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| 19:27:22
| <shama> | jez0990_: thanks, I get: No matching processes belonging to you were found |
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| 19:30:00
| <jez0990_> | shama: and presumably you're not running node using sudo...? I'm all out of ideas after that, sorry :) (that error message is just very familiar recently!) |
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| 19:31:00
| <jesusabdullah> | how many times did you reboot? |
| 19:31:09
| <shama> | jez0990_: nope, as a user. Node v0.10.17 |
| 19:32:10
| <thlorenz> | did you know that with streams2 if you use objectMode and you happen to push Number 0, that kills your stream? |
| 19:32:20
| <shama> | I guess Ill just open my browser until I get that figured out... *drags his mouse dramatically over to the chrome icon* |
| 19:33:48
| <thlorenz> | but somehow you only see that if you put a transform in the middle - I guess this is not intended right isaacs? |
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| 19:44:35
| <thlorenz> | isaacs: made a repro repo: https://github.com/thlorenz/Streams2TransformPush0Bug |
| 19:54:13
| <isaacs> | thlorenz: sounds like a bug, i'll dig into it after lunch |
| 19:54:26
| <isaacs> | thlorenz: it'd help if you had an example that didn't use any external modules. |
| 19:54:33
| <isaacs> | thlorenz: like, just a script that only uses node stuff. |
| 19:57:35
| <thlorenz> | isaacs: cool - yeah that example is pure node :) |
| 20:00:40
| <thlorenz> | isaacs: made an issue https://github.com/joyent/node/issues/6183 that also links to my reproduction repo |
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| 20:04:31
| <mikolalysenko> | if anyone has a spare set of eyeballs, could someone give these lecture notes a look over to spot check them for errors? https://github.com/CS558/technology-lecture-2-node |
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| 20:05:34
| <isaacs> | thlorenz: fwiw, it's fixed in master |
| 20:05:51
| <isaacs> | thlorenz: simpler example script: https://gist.github.com/isaacs/6455434 |
| 20:05:55
| <thlorenz> | isaacs: was fixed or just now got fixed? |
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| 20:06:05
| <isaacs> | thlorenz: works as of current master. |
| 20:06:16
| <isaacs> | thlorenz: probably fixed in the stream3 refactor |
| 20:06:20
| <isaacs> | by accident, i mean |
| 20:06:33
| <thlorenz> | isaacs: any chance of that fix landing for stream2 as well? |
| 20:06:43
| <isaacs> | yes |
| 20:06:45
| <isaacs> | looking |
| 20:06:50
| <isaacs> | thlorenz: well, not THAT fix |
| 20:06:53
| <isaacs> | thlorenz: but A fix, sure. |
| 20:07:28
| <thlorenz> | isaacs: :) it's not that crucial - isn't blocking me or anything, just ran into it while digging into streams a bit |
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| 20:08:05
| <thlorenz> | isaacs: btw streams2 and streams3 API is identical just some subtle behavior changes right? |
| 20:08:44
| <isaacs> | thlorenz: found the bug |
| 20:08:49
| <isaacs> | thlorenz: yes |
| 20:08:55
| <isaacs> | thlorenz: streams3 is strictly additive |
| 20:08:55
| <thlorenz> | that was quick :) |
| 20:09:00
| <isaacs> | yeah, it was what i suspected |
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| 20:11:49
| <thlorenz> | isaacs: I like that short example - so a PassThru is basically a noop Transform - is that's why it exposed the same problems? |
| 20:13:51
| <isaacs> | yep |
| 20:14:31
| <thlorenz> | cool - still trying to wrap my head around things - especially how backpressure works now and such |
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| 20:20:24
| <isaacs> | thlorenz: landed in v0.10. it'll be in the next release. thanks for finding it :) |
| 20:21:06
| <thlorenz> | isaacs: awesome and my pleasure -- next time I'll try to go the extra step and supply at test and fix ;) |
| 20:21:16
| <isaacs> | no probs |
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| 20:21:49
| <Raynos> | isaacs: https://idea.popcount.org/2013-09-05-it-aint-about-the-callbacks/ that second issue is just a complaint about pipe() making the "wrong" default tradeoff ? |
| 20:22:11
| <Raynos> | i believe the author is just being full of shit and should implement his own pipe for his own tradeoff |
| 20:27:26
| <isaacs> | Raynos: well, he's upset that there's such a thing as a high water mark |
| 20:27:40
| <Raynos> | yes |
| 20:27:40
| <isaacs> | his assertions are false, though |
| 20:27:53
| <Raynos> | specifically he is upset that in a.pipe(b).pipe(c).pipe(d) b and c have their own hwm |
| 20:28:08
| <Raynos> | if b & c are not complex buffering async transforms then thats overkill |
| 20:28:18
| <isaacs> | ight |
| 20:28:36
| <Raynos> | but that might be solved by setting hwm to 0 on b & c |
| 20:30:00
| <thlorenz> | Raynos: since we are talking about streams do you have a link to a good explanation of a.pipe(b).pipe(a)? |
| 20:30:11
| <Raynos> | thlorenz: not realy |
| 20:30:15
| <thlorenz> | I don't get it - what if a is a readstream - how can I write to it? |
| 20:30:21
| <isaacs> | Raynos: i'd correct him, but i'm trying to not take responsibility for the correctness of the internet. |
| 20:30:28
| <isaacs> | Raynos: duty calls and all that. |
| 20:30:37
| * isaacs | fooding |
| 20:31:16
| <Raynos> | isaacs: is it possible to configure streams to have the one buffer flows from Readable to Writable at a time? or is it stupid to not have Readable fill up to hwm pre-emptively ? |
| 20:31:31
| <thlorenz> | Raynos: or maybe we can take some time @nodedonfeu and you help me get my head straight with all that streams stuff that has me confused at this point? |
| 20:31:41
| <Raynos> | thlorenz: for sure |
| 20:31:50
| <thlorenz> | cool :) looking forward to it |
| 20:31:52
| <Raynos> | thlorenz: the answer for a.pipe(b).pipe(a) is that it only works for TWO duplex streams |
| 20:32:13
| <thlorenz> | Raynos: ok, but then wouldn't that keep going forever? |
| 20:32:34
| <Raynos> | thlorenz: no because duplex streams are { in: Readable, out: Writable } |
| 20:32:37
| <Raynos> | conceptually |
| 20:32:47
| <Raynos> | and its a.in.pipe(b.out), b.in.pipe(a.out) |
| 20:33:01
| <Raynos> | for a through stream its an infinite loop |
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| 20:33:41
| <Raynos> | basically through means `stream.write(a) => stream.emit("data", a)` and duplex means `stream.write(a) => someone over the network gets a` |
| 20:34:56
| <thlorenz> | so you are saying a.out doesn't go back into a.in and therefore the loop is broken right there? |
| 20:35:18
| <Raynos> | yes |
| 20:35:32
| <Raynos> | unless you have net.createServer(function (s) { s.pipe(s) }) |
| 20:35:42
| <Raynos> | if the guy on the other end is an echo server you still get an infinite loop |
| 20:35:52
| <Raynos> | thlorenz: I think figure of eight is a good example of duplex |
| 20:36:12
| <Raynos> | thlorenz: but basically duplex is two directed edges and thruogh is a single directed edge |
| 20:36:27
| <Raynos> | duplex obvouisly has two directed edges where they are the same edge but in the other direction |
| 20:37:16
| <thlorenz> | thanks, that helps -- will still ask a bit more when we meet though ;) |
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| 20:45:38
| <thlorenz> | Raynos: after staring at this for another minute I think it finally clicked |
| 20:46:05
| <thlorenz> | so I'd use this to get some data from a client, transform it and pipe the results back out for instance right? |
| 20:46:05
| <Raynos> | thlorenz: :) |
| 20:46:21
| <Raynos> | yes |
| 20:46:23
| <Raynos> | thats one thing you can do |
| 20:46:27
| <Raynos> | you can also move the data somewhere |
| 20:46:32
| <Raynos> | like |
| 20:46:51
| <Raynos> | req.pipe(request("http://lulz.com" + req.url)).pipe(res) |
| 20:46:55
| <Raynos> | or you can do |
| 20:47:02
| <Raynos> | req.pipe(UPPERCASE()).pipe(res) |
| 20:47:15
| <thlorenz> | but req != res ? |
| 20:48:08
| <jesusabdullah> | yeah well |
| 20:48:19
| <thlorenz> | I mean that part was clear to me, just not version where you pipe back out into the same stream that piped you the data in in the first place |
| 20:48:40
| <thlorenz> | but I think now I get it - it just functions as both |
| 20:49:23
| <thlorenz> | and reads come from the other party and writes go to it and at that point the connection is interrupted unless it echos my writes back at me |
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| 22:14:09
| <Raynos> | thlorenz: sure but you can do `var socket = duplex(req, res); socket.pipe(UPPERCASE()).pipe(socket)` |
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