<fowl>
epitron, i was just looking at that, is that comic sans
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<epitron>
i think so :)
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<nowledge>
Hello, does anyone know where to connect the IRC for SciRuby
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<nowledge>
hello
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<scepticulous>
is there already a usable ruby implementation to calculate sqare-roots of bigintegers (300 - 400 digits) ?
<wallerdev>
probably more likely to find it in python :|
<scepticulous>
jepp, python has gmpy2, but, i am not going to do it in python ;)
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<Senjai>
scepticulous: I would look into BigDecimal
<Senjai>
scepticulous: Not sure if thats a solution or not
<scepticulous>
Senjai: i did, but unfortunatelly i think there is some issue. i calculated A = BigDecimal(bitnumber).sqrt(2).to_f.ceil **2 and it was smaller than N.. but, due to ceil it should be bigger
<scepticulous>
bitnumber should be "bignumber"
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<certainty>
scepticulous: doing crypto that early in the morning? :D
<scepticulous>
certainty: jepp, i thought, this way i could use all my cognitive resources ;)
<certainty>
sounds reasonable
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<scepticulous>
certainty: it seams as if my algorithm is not correct. python gmpy2 behaves just as ruby bigdecimal
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<certainty>
apeiros: i wonder how objective that text on slashdot is, but it's good that something happens no matter what direction it's gona take in the and
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<certainty>
erm end
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<certainty>
scepticulous: still not fond of applying newton's method? Or is that not feasable?
<scepticulous>
certainty: i'am still trying to get around it ;)
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<scepticulous>
certainty: something is different now ^^ ( i dont know why... lets see )
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<certainty>
scepticulous: does it work or is it just differently wrong?
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<scepticulous>
certainty: dont know yet. at least raising the root to the power of 2 is no longer smaller than the initial value
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<scepticulous>
looks good => p*q == N is true
<scepticulous>
certainty: wow, i solved, but that wasnt the real task. it was just like the pre-condition to start working on the real equations
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<certainty>
scepticulous: great. What are you working on?
<scepticulous>
homework. i have to factor some large primes ^^
<scepticulous>
in cases of N where p and q are not generated independently
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<certainty>
scepticulous: you mean p and q depend on each other somehow?
<scepticulous>
certainty: jepp
<certainty>
due to an error in the PRNG?
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<scepticulous>
certainty: maybe, or due to an idiot not implementing crypt correctly ( maybe for performance. finding large primes is somewhat slow )
<scepticulous>
certainty: irc should have latex support ^^
<certainty>
scepticulous: it has. just throw it in. We can copy and paste then :) .. Also I believe there are pastebins that support LaTeX
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<scepticulous>
certainty: i just thought it would be nice. I dont wanna show anybody anything ^^
<certainty>
it's a pitty. I like science ;)
<certainty>
anyway, bbl
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<fowl>
and here i thought i heard every buzzword there was to hear
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<whitequark>
whether the matching code is generated once or at every startup doesn't make any difference, except for slightly higher loading time
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<whitequark>
(superlinear complexity) if your parser backtracks, it's easy to construct an input that will make it arbitrarily slow. it's a DoS attack; the resources spent by attacker and you are asymmetrical
<whitequark>
(it's also not too hard to hit accidentally)
<whitequark>
if your parser backtracks and memoizes, you'll get linear time complexity, but also linear space, i.e. it will eat a shitton of memory
<whitequark>
and as yorickpeterse's LALR(1) parser already eats a shitton of memory... I guess that is not welcome
<whitequark>
no, memoization means that the parser will have to keep a live reference to all that while parsing the entire input
<whitequark>
thus it won't be collected.
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<whitequark>
(also, treetop and parslet are basically same thing, whereas ragel works on a lower level)
<fowl>
so tell me why something being slow in ruby is a bad thing, and if slowness is bad why not use a faster language
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<yorickpeterse>
whitequark: the buffering bits (marking start/stop) is what I had before, but it was not ideal so I got rid of it
<yorickpeterse>
both performance wise but also code wise
<yorickpeterse>
e.g. eventually I want to be able to move away from fcall to fnext/fbreak so I can interrupt the lexer
<yorickpeterse>
Marking start/stop positions doesn't prevent that, but not having it would be nice
<whitequark>
yorickpeterse: well, then just chop off the <-- and -->, they're constant-size
<whitequark>
I mean, add & subtract 3 to/from indexes.
<yorickpeterse>
fowl: because I want my stuff parsed in less than 10 days
<whitequark>
if you had fragments of unknown size, you'd have to mark start/stop positions; there's no way around it
<fowl>
and ruby is what you pick.. for speed.. lol
<yorickpeterse>
fowl: good troll
<fowl>
ive done better
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<astroo->
hello people
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<astroo->
i have a free project for all and for now is in ruby on rails, can i talk about?
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<whitequark>
#rubyonrails
<astroo->
ok thanks but the project can be build by more languages
<whitequark>
I'm not sure what you mean by that, but you can talk about it if you want.
<astroo->
ok thanks
<astroo->
my project is like a complement of the wikipedia with chat and information of the day, will be the "home" of all people, if you want to help private me please
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