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ratbert90 posted:H3Y GuY5; Ju57 P0571NG 0N 7h3 B357 P4G3. 1f j00 k4N r34d 7h12 J00 h4V3 4 sp3c14L K1nD 0F M1nD
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May 31, 2017 18:40
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meatpotato posted:hi, am I the terrible programmer? It's convention where I work to prefix class data members with 'm_' and I didn't think it's that weird. Similarly, static variables typically get 's_' prefixes. This is all C and C++ stuff. those prefixes are garbage, but mostly harmless garbage.
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May 31, 2017 18:51
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meatpotato posted:hi, am I the terrible programmer? It's convention where I work to prefix class data members with 'm_' and I didn't think it's that weird. Similarly, static variables typically get 's_' prefixes. This is all C and C++ stuff. on the plus side, now you can use reflection (if your runtime supports it) and filter your fields by name alone! edit: c/c++ well in that case you can write a parser to do it
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May 31, 2017 18:52
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simble posted:on the plus side, now you can use reflection (if your runtime supports it) and filter your fields by name alone! look at this scrub who doesn't even use uncontacted amazonian tribe tree bark scratches glyphs to implement ad-hoc polymorphism
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May 31, 2017 18:58
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NihilCredo posted:look at this scrub who doesn't even use uncontacted amazonian tribe tree bark scratches glyphs to implement ad-hoc polymorphism I once had polymorphism go 3 levels deep and I felt REALLY bad.
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May 31, 2017 19:01
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hey terrible programmers. can you guys make a case for why I should use push notifications with rabbitmq or kafka instead of polling a Postgres db. I know that polling sucks, but I have a coworker who's very against changing anything ever, including polling a remote db when we don't need to (he's even against me putting a rest API in front of the DB so that the website is the only one directly accessing the db cause he's worried about latency)
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May 31, 2017 19:58
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Condiv posted:hey terrible programmers. can you guys make a case for why I should use push notifications with rabbitmq or kafka instead of polling a Postgres db. I know that polling sucks, but I have a coworker who's very against changing anything ever, including polling a remote db when we don't need to (he's even against me putting a rest API in front of the DB so that the website is the only one directly accessing the db cause he's worried about latency) what is your use case. polling is a really lovely thing to do if your software is running on someone else's device and will eat their bandwidth to do it, especially mobile. if its just a regular internet webzone that you dont expect people to idle on for a long time then do whatever.
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May 31, 2017 20:34
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cis autodrag posted:what is your use case. polling is a really lovely thing to do if your software is running on someone else's device and will eat their bandwidth to do it, especially mobile. if its just a regular internet webzone that you dont expect people to idle on for a long time then do whatever. use case is a hpc system needs to receive job requests and the current method of doing that is polling a job table in a DB
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May 31, 2017 20:38
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Condiv posted:hey terrible programmers. can you guys make a case for why I should use push notifications with rabbitmq or kafka instead of polling a Postgres db. I know that polling sucks, but I have a coworker who's very against changing anything ever, including polling a remote db when we don't need to (he's even against me putting a rest API in front of the DB so that the website is the only one directly accessing the db cause he's worried about latency) you can also build an entire house by hammering the nails with rocks
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May 31, 2017 20:38
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Condiv posted:use case is a hpc system needs to receive job requests and the current method of doing that is polling a job table in a DB well, i guess my question is "what prompted you to want to change it?" because if the polling method is working fine and it's not manifesting any serious drawbacks for you or causing you to do heinous things elsewhere in the codebase, "leave well enough alone" is generally a good policy.
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May 31, 2017 20:52
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DuckConference posted:Hungarian notation was in the coding standard here when I started and I never really questioned it because it seemed fine, but now I'm kinda questioning if it's worth it. I mean I guess it's a bit redundant since the compiler is checking your types the explanation I read is that Hungarian Notation was explicitly meant for same-typed data with different functional meaning, like integer position vs. integer size. obviously that's not what it's come to be
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May 31, 2017 20:59
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Condiv posted:hey terrible programmers. can you guys make a case for why I should use push notifications with rabbitmq or kafka instead of polling a Postgres db. I know that polling sucks, but I have a coworker who's very against changing anything ever, including polling a remote db when we don't need to (he's even against me putting a rest API in front of the DB so that the website is the only one directly accessing the db cause he's worried about latency) if he really loves postgres and doesn't want to use a separate queue, did you know that postgres has built in listen/notify? https://www.postgresql.org/docs/current/static/sql-notify.html 
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May 31, 2017 21:00
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DuckConference posted:Hungarian notation was in the coding standard here when I started and I never really questioned it because it seemed fine, but now I'm kinda questioning if it's worth it. I mean I guess it's a bit redundant since the compiler is checking your types The only time Hungarian notation has had any affect on any codebase I've seen is when it's causing developers to chase their tails by obscuring simple bugs due to variables claiming to be something they're not.
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May 31, 2017 21:10
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LordSaturn posted:the explanation I read is that Hungarian Notation was explicitly meant for same-typed data with different functional meaning, like integer position vs. integer size. obviously that's not what it's come to be hungarian notation is a relic from a time when we had code editors with no intellisense and no easy way to alias types to differentiate usage. there's like 0 reason in a modern language not to just alias, say, long to two different other identifiers if you have two specific types of long that should only be used in certain ways. or even better wrap them in a class that enforces the semantics of how you want them to be used. and besides, anything that depends on other developers to name variables appropriately is a suicide mission from day one.
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May 31, 2017 21:12
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fuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuck i have to setup a mail server. an external client is having issues sending email to an address and they have been terrible at providing any useful information (like how they are even sending the email). google apps email logging is not helping, which could also mean its not even getting as far as the mail server on our end. in any case, ive been tasked with attempting to spin up a mail server so we have more debugging tools on oru end. are there any good docker images or "hold my hand" setups? we would like to deploy it to our kubernetes cluster, too. just the backend parts, no dumb web ui.
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May 31, 2017 21:19
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ThePeavstenator posted:it's me, the guy who has his IDE automatically generate getters and setters for every member well, use AutoValue then and make your poo poo immutable where possible, sheesh
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May 31, 2017 21:22
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Sapozhnik posted:if you add extension methods to string then i hope you loving die. yes i too like having to keep utility classes around because the java string api only has case-sensitive endsWith and contains methods i mean it's not like a modern ide can keep track of where extension methods are defined, no sir!
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May 31, 2017 21:24
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cis autodrag posted:well, i guess my question is "what prompted you to want to change it?" because if the polling method is working fine and it's not manifesting any serious drawbacks for you or causing you to do heinous things elsewhere in the codebase, "leave well enough alone" is generally a good policy. it's not really working fine, and we have multiple services polling every minute. plus, the db only has one username and password and I'm trying to abstract it away so I can clean it up since I'm rewriting the web service to get rid of the unholy hacked together php abomination, I have an opportunity to have the web service deliver task requests to a message queue if it would be a good idea. I'm almost certainly gonna hide the db behind a rest API and block outside access to it asap if I can though Condiv fucked around with this message at 21:31 on May 31, 2017 |
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May 31, 2017 21:27
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JewKiller 3000 posted:if he really loves postgres and doesn't want to use a separate queue, did you know that postgres has built in listen/notify? https://www.postgresql.org/docs/current/static/sql-notify.html Warning: to actually use postgres' listen/notify without polling in Java you'll need to use a different set of JDBC drivers, as the default ones don't support it. http://impossibl.github.io/pgjdbc-ng/
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May 31, 2017 21:36
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LordSaturn posted:the explanation I read is that Hungarian Notation was explicitly meant for same-typed data with different functional meaning, like integer position vs. integer size. obviously that's not what it's come to be
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May 31, 2017 21:46
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Condiv posted:it's not really working fine, and we have multiple services polling every minute. plus, the db only has one username and password and I'm trying to abstract it away so I can clean it up Things to note about kafka: It's sure as gently caress not lightweight, hope you enjoy managing a shitload of jvm things (e.g. at least 3 zookeeper nodes as well as the brokers ) It guarantees at least once delivery for things in a consumer group It only guarantees ordering if your topic has 1 partition. It's really really really good at pushing enormous message volumes on meh hardware, and it does scale horizontally if you can shard the topic Re latency, How many calls / s are made to the db ? jre fucked around with this message at 23:13 on May 31, 2017 |
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May 31, 2017 23:11
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Share Bear posted:
i think symbolic butt is correct, you've got observed input data x1, x2, x3, ...., xn and observed output data y1, y2, y3, ..., yn the xs may be vector-valued, and that's where the p comes from so if you had n=4 p=3, you might have data like x1 = 0,0,0 y1 = 1 x2 = 1,0,1 y2 = 0 x3= -1,1,0 y3 = 1 x4 = 1,0,2 y4 = -1
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May 31, 2017 23:28
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Chalks posted:Yeah, extension methods are awesome, finding out what god drat using statement you need to add in order for them to work is not. extension methods are better in Objective-C, they're called categories there and there's no difference in syntax between a method in a category and a method on the class itself there's especially no bullshit about passing self to the method or anything like that and of course Swift got categories from Objective-C so they don't suck there either
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Jun 1, 2017 00:07
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cis autodrag posted:ya, in vb6 there's this horror show where the first 200 lines of your class end up being all these private global variables that control way too much of your class's behavior. you can of course do that in any language, but vb6 practically requires it to get any kind of complex behavior out of the thing. are member variables in vb6 really called "global" cause that sounds crazy (just crazy enough to be vb6?)
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Jun 1, 2017 00:12
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cool av posted:are member variables in vb6 really called "global" cause that sounds crazy (just crazy enough to be vb6?) vb6 doesn't have inheritance does it even have a class/instance distinction, or does it have developers define "objects" the latter would make "m_ indicates a global" sensible
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Jun 1, 2017 00:16
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jre posted:Things to note about kafka: 4-8 with things being quiet
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Jun 1, 2017 00:53
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eschaton posted:vb6 doesn't have inheritance there's not even a concept of static methods. you can only access a class's stuff through an instance of it, which results in a whole gently caress ton of passing around framework objects in nutso daisy chains of code.
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Jun 1, 2017 01:01
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also eschaton just once id like you to know less about the things i do every day than i do :p
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Jun 1, 2017 01:11
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Condiv posted:use case is a hpc system needs to receive job requests and the current method of doing that is polling a job table in a DB i am literally writing something about this question but my advice would be don't use a broker, the end
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Jun 1, 2017 02:48
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Ploft-shell crab posted:you can use a database table as a queue at the point where you are assigning work to a queue and not directly to a machine, you're not really worried about latency i mean, most of what you used a queue for was avoiding service discovery/configuration at the point where your queue outlives the clients requesting work, your queue needs to handle recovery too which is y'know, restarting things, retrying things and queues that handle retying of jobs, or jobs with a more complex lifecycle than 'enqueued -> delivered' for messages do start to look more like a database than a buffer. (this is one of those things where someone starts with a started_at of NULL, and a ended_at of NULL and then a cacophony of booleans to indicate each new state that doesn't fit in exactly, just use a text column called `state`) but in the end you end up building a lot of a database atop, although you're in for a world of pain if you try to wrap every job inside a transaction this all makes sense for long lived jobs, high thoughput but not low latency or short stuff on the other hand, i guess if a database is overkill for short lived jobs, so is a queue at this point you'd be doing recovery in the client, so you don't need to do any real replication in the queue, or ha youll end up with some system for handing off work to active workers, maybe workers polling the queue or, forward any requests that come in to the most recent idle worker (hello join-idle-queue)/random so, once you've done that well you can get rid of the queue because you don't need it so i guess what i am saying is that queues are pretty much the worst way to distribute work
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Jun 1, 2017 03:01
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i am sure someone will tell you to use a broker but that is advice from people who don't support them in production
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Jun 1, 2017 03:02
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jre posted:Things to note about kafka: hi i saw a trash meme  and well i do not want to make more effort than this to talk about kafka
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Jun 1, 2017 03:03
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i loving hate queues
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Jun 1, 2017 03:06
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imo if you just need a basic work queue, and if you can get away with using a postgres 9.5+ table and SELECT FOR UPDATE SKIP LOCKED, you should probably just do that, because it's hella ez
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Jun 1, 2017 03:12
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what is a good way to distribute work
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Jun 1, 2017 03:13
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if your messages are important some part of them is gonna be living in your database so just do it all there.
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Jun 1, 2017 03:14
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raminasi posted:what is a good way to distribute work a bunch of thread pools gang banging the database
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Jun 1, 2017 03:18
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Shaggar posted:if your messages are important some part of them is gonna be living in your database so just do it all there. shaggar was right, again
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Jun 1, 2017 03:20
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JewKiller 3000 posted:imo if you just need a basic work queue, and if you can get away with using a postgres 9.5+ table and SELECT FOR UPDATE SKIP LOCKED, you should probably just do that, because it's hella ez also if your next job query gets expensive just hack up a temporary table and amortize filling it up from diff workers / stick it in a buffer somewhere fwiw: this is one of the workloads where mysql can be a better fit than postgres specifically because of handling in-place updates, on high volume write/update paths
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Jun 1, 2017 03:23
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I treat my messaging as idempotent cause I don't care if the client whines that they got duplicate faxes.
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Jun 1, 2017 03:32
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