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<jtoy>
is it realistic to run 100 ruby processes on a single machine, like say a macbookair
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<jtoy>
I've been using event machine for a lot of stuff, but i don't think it scales as much as I expected it to
<rescrv>
I'm trying to write a C extension with two classes. "Deferred" should be a parent, and "DeferredGet" should inherit from it. I'm getting contradictory errors that occur in the "init" function.
<rescrv>
I've tried all combinations of module vs. class and rb_extend_object vs rb_include_module
<drbrain>
rescrv: rb_define_class_under's third argument is the superclass
<rescrv>
drbrain: Thanks! Somehow I've been reading docs and missed that
<drbrain>
rescrv: then you can delete line 9, of course :)
<drbrain>
rescrv: why define new and initialize?
<drbrain>
rescrv: usually you just define initialize and let rb_class_new_instance() do the work
<rescrv>
what if you're trying to wrap a C struct?
<drbrain>
rb_define_alloc_func() to allocate the struct
<drbrain>
Class#new is roughly def new(*args, *block); obj = allocate; obj.initialize(*args, &block); obj; end
<rescrv>
thanks. I started using rb_define_allc_func for the first class, just didn't change the second
<drbrain>
so using rb_define_alloc_func (like line 4) to set up the struct and defining initialize (like line 5) is enough
<drbrain>
… usually
<rescrv>
thanks
<drbrain>
cool
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<drbrain>
if Deferred and DeferredGet use the same C struct you don't need to rb_define_alloc_func twice
<rescrv>
DeferredGet will use another C struct with more in it. Will this be problematic?
<drbrain>
you can place the differences in setup in initialize which should save some typing
<drbrain>
nope
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<drbrain>
well, not for allocation
<drbrain>
DeferredGet's struct should be a superset of Deferred's struct
<rescrv>
So just place Deferred's struct at the beginning
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<drbrain>
So long as Deferred's struct's fields all exist in DeferredGet's struct you'll have no problem
<drbrain>
I've got to catch my bus now, good luck!
<rescrv>
thanks! and good travels
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<drbrain>
Ok, on the bus
<drbrain>
I think the only restriction is that you need to be able to cast a struct DeferredGet to a struct Deferred, otherwise you may access the wrong field
<drbrain>
In 1.9 and newer there's Typed_Data_Get_Struct that helps prevent bugs between uncastable structs, and also let's you define inheritance between the two.
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<banisterfiend>
znowi: i've seen longer
<rescrv>
I'll just put it at the front which should be good enough
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<zenspider>
erikh: no. I just wrote it.
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<rue>
Dangit, no unicode out of the box for termtter…
<rue>
zenspider: Be modern, C±
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<banisterfiend>
rue: hey rue
<Criztian>
hellooo
<banisterfiend>
Criztian: hey rue
<Criztian>
lol
<Criztian>
happens when you pick up the previous line
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<Criztian>
banisterfiend: hey rue to you too XD
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<rue>
Hy
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<jMCg>
So, once again I learn that Ruby on Rails != Ruby.
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<kith>
in ruby/sequel, when i do @db.transaction do; ary.each {}; end the transaction gets executed only when the ary has been iterated yes?
<apeiros_>
kith: should. and only when no exception was raised.
<kith>
i see
<apeiros_>
but that really totally depends on what @db.transaction actually is…
<apeiros_>
you see, just because it's named 'transaction'…
<apeiros_>
ah, ruby/sequel… should have read better
<apeiros_>
but still consult the sequel docs. but I'd be surprised if it wasn't as just described.
<kith>
i did, wasnt sure if i understood it right
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<kith>
say i had insert statements inside the ary.each {} then enclosing the whole shebang inside the transaction is much faster right?
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<workmad3>
kith: err... I don't see how that has much relevance
<kith>
without the transaction, each insert will be a transaction itself, while enclosing it will make it one big transaction no?
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<kith>
workmad3: doesnt sound right?
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<kith>
am i totally off?
<workmad3>
kith: well, that's correct... but unless you're profiling, I wouldn't say 'much faster' because you're making a big assumption about how much overhead starting and commiting several small transactions is compared to one very large one
<kith>
hmm
<kith>
okay
<workmad3>
kith: what it does is allows you to say 'all of these must be commited, or none of them'
<workmad3>
kith: look at it from data integrity, not from performance
<kith>
so i got it backwards... the integrity part i thought is a nice side effect :D
<workmad3>
no, the integrity is the entire point
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<andrewvos>
In ruby, how do I spawn a process and have it stay alive even when ruby finishes executing
<andrewvos>
?
<andrewvos>
Sorry, in 1.8.7
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<andrewvos>
Found it by the way. Fork, and then a detach seemed to work.
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<Defusal>
sometimes i really don't understand rubys behavior
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<lianj>
example?
<Defusal>
a module is included into a subclass from the inherited callback, it works fine
<Defusal>
i then add a puts line to one of the modules methods
<Defusal>
and suddenly, i have to include ::Module, instead of just the modules name
<Defusal>
else it says Module is not a constant in the ancestors class
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<Defusal>
(Module is not actually called Module obviously, that was a bad example name)
<Defusal>
but i'm pretty sure this will make no more sense to anyone in here, than it does to me
<lianj>
sure its about the puts?
<Defusal>
i don't see the logic behind it
<Defusal>
yes
<Defusal>
i removed the puts and tested, then put it back
<lianj>
maybe pastebin something :)
<Defusal>
i'll have to see what the minimal test case is at some stage
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<Defusal>
this is just one more case where i really don't understand why i have to prepend :: to the class else it tries to resolve it in the nested classes
<Defusal>
it is certainly not the first time
<Defusal>
this is probably the only thing in ruby i still don't understand
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<Defusal>
lianj, after trying to make a minimal test case and then testing again in the actually app it seems to not happen
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<Defusal>
so i guess it could have been my dodgy internet not syncing properly/fast enough
<Defusal>
must have been unlucky that it happened for both the test i did before
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<lianj>
huh?
<apeiros_>
Defusal: I don't see how prepended :: doesn't make sense to you. Say you have something like Braille::String, you can't reference String within Braille unless you have something to express "top-level". and :: does that.
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<apeiros_>
Defusal: alternatively you'd just have a language where you have to fully qualify every constant all the time. I myself wouldn't like that.
<lianj>
right :: is no magic
<Defusal>
apeiros_, i obviously wasn't clear. i didn't say i don't understand its use. in certain cases i have been forced to use it where it should not be necessary.
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<apeiros_>
Defusal: I highly doubt that :)
<Defusal>
but i will wait until i come across such a case before i bring it up again
<lianj>
:)
<apeiros_>
Defusal: don't forget those nice things that are autoload and const_missing.
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<apeiros_>
and assuming you came across the issues in rails, it was most likely its stupid autoloading (which uses const_missing)
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<Defusal>
i do my own modular loading, i do not use autoload nor do i use rails
<Defusal>
const_missing would be useful if it were not restricted to the top level namespace
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<apeiros_>
Defusal: it isn't
<apeiros_>
(restricted to toplevel)
<Defusal>
it doesn't work anywhere else
<Defusal>
due to the way ruby constants are looked up
<apeiros_>
no idea why you think it was.
<apeiros_>
of course it does.
<Defusal>
apeiros_, show me an example of where it can be used in a nested namespace
<Defusal>
please :)
<apeiros_>
sorry Defusal, but rails pretty much disproves what you're saying.
<apeiros_>
gotta catch the train, so can't test it, but:
<Defusal>
heh
<apeiros_>
module Foo; def self.const_missing(*n); const_set(n, "You were looking for #{n}"); end; end
<apeiros_>
Foo::Bar
<Defusal>
oh right
<Defusal>
i was almost right
<apeiros_>
urgs
<apeiros_>
-*
<Defusal>
apeiros_, it cannot be used in a nested namespace without a fully qualified namespace
<apeiros_>
ok, tested.
<apeiros_>
module Foo; def self.const_missing(n); const_set(n, "You were looking for #{n}"); end; end
<apeiros_>
works
<Defusal>
which makes it useless for the only use case i ever wanted to use it for
<apeiros_>
I'm quite sure you're wrong on that too
<Defusal>
module Foo; def self.const_missing(n); const_set(n, "You were looking for #{n}"); end; Bar; end
<apeiros_>
but you'd have to make a proper example
<Defusal>
Bar will not work.
<apeiros_>
and I have to go now…
<apeiros_>
cya
<Defusal>
i am 100% sure of this
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<Defusal>
it is just the way ruby looks up constants
<Defusal>
and if anyone would like to prove me wrong, be my guest ;)
<Defusal>
oh actually, i just realized that is using const_set
<Defusal>
i'd actually have to figure out if i can make that work in my use case
<Defusal>
you'd usually return the value from const_missing, i never thought of setting the const at that point
<lianj>
why do that stuff anyway ;)
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<Defusal>
to not have to say SomeModulesModels::ModelName from inside SomeModule
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* lianj
scratches head
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<Defusal>
lianj, in a modular platform where modules could have models that have the same name, 'User' is far better than having to use SomeModuleNamesModels::User
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<Defusal>
here is a somewhat interesting quirk
<Defusal>
maybe someone knows the reasoning behind it
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<Defusal>
valid: log "Killing instance" if log
<Defusal>
valid: log(:green, "Killing instance") if log
<Defusal>
invalid: log :green, "Killing instance" if log
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<Defusal>
oh gawd, nevermind me, i don't even want to know how that bool variables name became "log"
<injekt>
log(:green ("kidding instance" if log))
<JustinCampbell>
;)
<Defusal>
but it is an interesting error never the less
<Defusal>
because its valid with ( )
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<matled>
Defusal: I don't get an error with that
<Defusal>
matled, log was a method arg as well as a method
<matled>
alias :log :puts; log :green, "Killing instance" if log
<matled>
that code works fine here
<Defusal>
alias :log :puts; def foo(log); log :green, "Killing instance" if log end
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<Defusal>
:P
<banisterfiend>
injekt: i thought you abandoned irc ;)
<apeiros_>
Defusal: still 100% sure? :)
<Defusal>
i havn't seen indeterminate in years
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<Defusal>
apeiros_, i realized after you left that you were setting the actual constant in const_missing, not just returning a value
<apeiros_>
it works the same without
<Defusal>
but i would need to test to make sure method_missing is ever called
<Defusal>
it wasn't iirc
<apeiros_>
and: ruby-1.9.3:003:0>> module Foo; Bar; end # => "You were looking for Bar"
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<apeiros_>
const_missing, not method_missing
<apeiros_>
what does not work is if you have a toplevel Bar
<Defusal>
n/method_/const_
<apeiros_>
then const_missing will (of course) not be triggered
<Defusal>
*s/
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<Defusal>
been a long day, too much coffee
<apeiros_>
^^
<apeiros_>
anyway, const_missing works everywhere and for non-fully-qualified constants too.
<Defusal>
hmm, i wonder if that was an issue
<Defusal>
i'll do a little testing when i get a chance
<apeiros_>
you can always use self::Bar (in: module Foo; self::Bar; end) to enforce the namespace without fully qualifying it literally
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<apeiros_>
that'll force const_missing, even if a toplevel const exists
<apeiros_>
it'll work differently with subclassing, though
<Defusal>
ohhhh
<Defusal>
i remember the limitation now!
<Defusal>
const_missing does not work when using class_eval
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<Defusal>
which is why i cannot use it
<apeiros_>
it does. you just have to be aware of class_eval's constant lookup rule
<Defusal>
hang on, let me see if i can find the article i finally found when i couldnt get it working at the time
<apeiros_>
which differs from normal class Foo; end. and that difference is unrelated to const_missing
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<Defusal>
basically, the way constant lookups work in ruby, constants are not looked up when using instance/class_eval
<Defusal>
so you cannot use const_missing in a DSL
<apeiros_>
class_eval's const lookup is lexically scoped
<Defusal>
yes
<Defusal>
which is why i cannot use it
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<Defusal>
oh well, took long enough to recall the details, but it doesnt change the fact that it is useless for my DSL
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<apeiros_>
Defusal: ok. but as said, that problem is unrelated to const_missing.
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* apeiros_
wonders if there's a dynamic way to change constant lookup context…
<Defusal>
i did mention earlier before you quit that it is due to the way ruby does constant look ups
<apeiros_>
reminds me that I once wanted to write a universal_eval
<Defusal>
i never said it was const_missings fault
<Defusal>
it is just not possible
<apeiros_>
Defusal: well, your phrasing was like "const_missing only works on toplevel". and that's - as proven - wrong ;-)
<Defusal>
sure, its been a while, and i have done a ridiculous amount of stuff since then, so please excuse my memory
<Defusal>
i do hope that it will be possible one day though
<Defusal>
not having to use SomeModulesModels::User for the User model belonging to a module would be great
<apeiros_>
you can make it work
<apeiros_>
it'd be ugly as fuck, though.
<apeiros_>
gimme a minute
<Defusal>
more ugly than having to use "SomeModulesModels::User" instead of "User"?
<Defusal>
:P
<apeiros_>
depends on your mileage
<Defusal>
yeah, my DSL aims to minimize implementation code, so it would be worth it in this case
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<apeiros_>
hrmpf, unexpected resistance! evil!
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<apeiros_>
Defusal: ok, typing with your hands full of tomato sauce is not a good idea
<apeiros_>
anyway, my idea to trick it doesn't work :(
<apeiros_>
would need universal_eval. man, it'd be awesome. universal_eval lvars: binding, ivars: obj, cvars: klass, constants: mod
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<Defusal>
apeiros_, hehe, yeah i thought as much
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<Defusal>
hopefully there will be a universal_eval one day
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<Defusal>
apeiros_, when i eventually finish the project i am currently working on i will open source it, maybe you and/or some other people will have some suggestions about it
<Defusal>
and im sure some people will think of some uses for it
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<zzak>
what is $/ on windows/
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<zzak>
\r?
<zzak>
imperator ping?
<Defusal>
zzak: \r\n
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<zzak>
thanks
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<znowi>
Defusal: what is the project?
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<Defusal>
znouza: an asynchronous DRb interface that provides some useful ways for building distributed interfaces, like being able to call methods (such as registering callbacks) on the return/yield of a method before it has returned
<Defusal>
*DRb-like interface
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<Defusal>
imperator, if he meant $ in regex it's $...
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<Defusal>
$ doesn't change on different platforms afaik, at least not on windows and *nix
<Defusal>
but \n on windows is \r\n
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<heftig>
only externally
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<heftig>
if you open a file in text mode, it gets transparently converted
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<heftig>
that's why $/ is still \n and not \r\n
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<imperator>
erikh, ping
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<rue>
Eww
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<felipebalbi>
hi, I'm using (abusing) ruby unit test framework to run some tests on a series of boards I have attached to my pc through serial
<felipebalbi>
basically I want the same test classes to be used on multiple instances of my Board class
<felipebalbi>
the reason is that different instances of Board will be writing/reading to/from different tty ports
<felipebalbi>
is there an easy way to do that ?
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<drbrain>
felipebalbi: you have multiple Board classes you want to run tests in?
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<drbrain>
felipebalbi: one strategy is to have a GenericBoardTest and different SpecificBoardTest classes that inherit from it to provide custom setup/tests
<drbrain>
felipebalbi: another is to put your tests in a module and include them in the SpecificBoard classes
<drbrain>
I'd use include if boards have overlapping feature sets you want to test
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<apeiros_>
whitequark: howdy
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<apeiros_>
whitequark: say, do you happen to know if there are useful benchmarks for pl/sql? :)
<erikh>
heh
<erikh>
... you're serious, aren't you
<apeiros_>
erikh: learning pl/sql
<drbrain>
ged: ping
<erikh>
I'm sorry
<apeiros_>
I wouldn't have dreamed doing that…
<erikh>
that's right, you guys are an oracle shop right?
<apeiros_>
and I'm seriously disappointed. and that even while I had very very low expectations…
<ged>
drbrain: Hi.
<imperator>
erikh, you the person to ask test.rubygems.org questions?
<drbrain>
ged: looking at your RDoc patch to add extend support
<apeiros_>
I wouldn't call use an oracle shop. but we do use oracle. we will migrate to postgres eventually, though. but it'll probably take something between 3 and 10 years…
<drbrain>
there's a mention of a possible_bug test case, but it doesn't seem to be included
<drbrain>
at least, not in the full diff
<imperator>
apeiros_, is this for oracle? i think toad has some tools
<apeiros_>
erikh: oracles regex engine passes out at a mere 500 chars… that wasn't enough to even do a naive international area code detection…
<ged>
One sec, refreshing my memory.
<apeiros_>
imperator: oh, I meant pl/sql vs. other languages
<imperator>
pl/sql is different per vendor
<apeiros_>
o0
<apeiros_>
there's different oracle vendors?
<imperator>
do you mean "oracle pl/sql" when you say "pl/sql"?
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<apeiros_>
I wasn't aware that there are other pl/sql's
<apeiros_>
yes, ora pl/sql
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<apeiros_>
I mean I know that postgres has something that comes close to pl/sql, but I was under the impression that they call it pg/sql
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<imperator>
oh, maybe i just interpret "pl/sql" to be a generic term when perhaps it isn't
<ged>
drbrain: Ah, the possible_bug testcase was from the comments for 'include' documentation, but since 'extend' uses the same codeobject code, I just assumed it applied to extend as well.
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<apeiros_>
imperator: well, no idea really. I never paid attention. you may very well be correct…
<drbrain>
ged: ok, thanks!
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<erikh>
imperator: yes
<drbrain>
ged: looks like you forgot to call update_includes in ClassModule#complete, but I'll patch it up
<erikh>
imperator: can you email me? erik@hollensbe.org
<erikh>
pretty busy atm
<drbrain>
err, update_extends
<imperator>
apeiros_, anyway if you want to bench/profile/debug oracle pl/sql then i recommend toad
<apeiros_>
imperator: ok, duly noted. I hope to never get into that situation and escape to postgres first
<ged>
drbrain: update_extends you mean?
<drbrain>
ged: yeah
<ged>
drbrain: Right, okay. Thanks!
<imperator>
apeiros_, i haven't checked in a while, but toad may support pg by now; i'm pretty sure it supports mysql
<drbrain>
ged: no wonder, I have no tests for #complete! How could you know? :D
<ged>
drbrain: Does it otherwise look okay?
<ged>
Hehe.
<drbrain>
ged: yup
<ged>
Excellent. :)
<drbrain>
I just merged it and am wiring up this one little thing
<imperator>
apeiros_, i actually don't know what's out there for postgres, i should look
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<zenspider>
rawr
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<imperator>
zenspider, merge ma patch!
<zenspider>
which?
<imperator>
inline
<zenspider>
do windows compilers really not have -o ?
<zenspider>
because that seems ludicrous
<workmad3>
zenspider: mingw probably does
<imperator>
-o are optimization flags with msvc
<imperator>
workmad3, yes, it uses gcc
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<workmad3>
imperator: :)
<zenspider>
wait. if they didn't have -o... why hasn't anyone mentioned it before. luis uses/used this. the current windows code are his patches
<imperator>
he's assuming mingw
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<zenspider>
so your build process actually has to CD into the directory you want to build it in? that's ... wow
<zenspider>
why in the FUCK do you work on this platform imperator? you're a smart guy and you've never came off as a masochist to me
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<imperator>
i'm a rebel
<imperator>
rebelling against the tyranny of mingw!
<zenspider>
by supporting the majority platform... uh huh
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<imperator>
i guess i didn't think it was a big deal
<zenspider>
well... I can't accept that first block o' diff
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<imperator>
actually, you can specify the output locations of specific files, but not like -o afaik
<drbrain>
imperator: THAT'S WHAT THEY WANT YOU TO THINK
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<imperator>
i are sheeple
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<zenspider>
wait. n/m. you fixed that. tho... ugh
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<imperator>
oh, do you want cleaner commits?
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<zenspider>
file, line = $1, $2 if caller[1] =~ /(.*?):(\d+)/
<zenspider>
nah. I'm just fussing
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<zenspider>
you removed the linker flags... but not LDSHARED?
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<imperator>
ld shared is "cl -nologo -LD"
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<imperator>
cl is the compiler, -nologo just shuts down some otherwise verbose output, and -LD says "create .dll"
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<felipebalbi>
drbrain: thanks, that's a good idea ;-)
<zenspider>
does flag order matter? you moved CCDLFLAGS and LDFLAGS to the end
<imperator>
why is it set that way? dunno, i just deal with what is
<augustl>
hi folks. Currently doing `pkey = OpenSSL::PKey::RSA.new(File.read("path/to/key.pub")); pkey.verify(OpenSSL::Digest::SHA256.new, [signature].pack("H*"), data)`. In other words, `verify` wants to hash the signature for me, but my signature is already is hashed
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<imperator>
zenspider, yes, the linker flags have to come after the "-link" option, that's why they were moved
<augustl>
annoying to have to turn it into binary first
<augustl>
err, confusing "hash" and "hex" there a bit, but you get the point
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<imperator>
zenspider, c'mon now, be fair, you've got some code for screwy, old osx stuff in there too :-P
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<zenspider>
clearly tagged as such
<zenspider>
but... those "screwy" flags were still 10x more developer friendly than your platform (of any age)
<imperator>
well, it's not big thing if you'd rather not mess around with this, i've got my fork out there if anyone ever needs it
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<petercooper>
so really people should just pay me to sit my ass down in one place and not move <g>
<deryl>
haha
<petercooper>
or is that basically a career at microsoft..?
<deryl>
careful, or you might end up with a burning van in the front lobby (ala Greece)
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<deryl>
not working for MS will at least save you that hassle (some not so happy people drove a burning van through the MS HQ in Greece the other day)
* petercooper
is surprised to discover he is closer to Athens than NYC is to LA
<petercooper>
(by quite some margin too)
<deryl>
thats interesting. didn't realize either. would have thought the distance would be greater
<petercooper>
Europe is teeny weeny
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<deryl>
yeah definitely not a Canada :)
<petercooper>
Russia, OTOH, is not, as both Hitler and Napoleon will admit
<deryl>
lol
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<deryl>
think both of them will admit, the russians unwillingness to get out the way made the road just a wee bit longer too ;)
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<deryl>
i got an awesome fiance. but I'll be damned if she knows how to identify which chat box she's pasting huge swaths of text to (person-wise). She's chatting with remote lab partners, and keeps pasting *me* these absolutely huge chunks of texts from her thesis hehe
<deryl>
ahh not her thesis, she's working on a debate for her remote class. *sigh*
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<hahuang65>
How do I do an STDIN.gets without it stalling waiting for input? I'd like it to just try to grab something and move on if there's nothing. (I have an endless loop just waiting for input)