dxbydt

78 ms·

721.
by dxbydt 14y ago
Dude, thanks for that! I really enjoyed the closed form solution, though there is absolutely no way I could have come up with that under time-pressure in a codesprint. My solution was rather trivial: The base case is 2 bit numbers, which ar
722.
by dxbydt 14y ago
fizzbuzz: http://i.imgur.com/QkLdz.png
723.
by dxbydt 14y ago
i solved a problem featured on the yc company interviewstreet.com codesprint. the problem: Count the number of one-bits from 0 to 2^n - 1, for n from 1 to 20. my solution: http://i.imgur.com/hUxt0.png when you run the solution: Num
724.
by dxbydt 14y ago
> most customers want products, not research "I think that it's extraordinarily important that we in computer science keep fun in computing. When it started out, it was an awful lot of fun. Of course, the paying customers got shafted ev
725.
by dxbydt 14y ago
fwiw, an opposite take, from a decade ago. at my cs pgm, the assistant professors were supposed to make a presentation on day 1 so the grad students could make an informed decision which prof to work with, which subjects to sign up for. the
726.
by dxbydt 14y ago
to gauge marginal positive externalities, invert the principal component & see what remains. as an example - suppose you wake up tomorrow and google search stops working. never mind why - some random bug impossible to figure out, so it
727.
by dxbydt 14y ago
Google page 179 "Hedgehogging" by Barton Biggs. There's one whole chapter in that book that's an indictment of Meeker, Blodget, Quattrone, Glassman ( the Dow 36000 guy ) and the rest of the folks who supplied the oxygen for the previous bub
728.
by dxbydt 14y ago
For the sake of the yc brand if not for anything else, its better to put some numbers out there on what would be a reasonable stake & salary for joining a yc startup as an early employee. val (stake,salary) = f( valuation,employe
729.
by dxbydt 14y ago
In Indian high schools, you are supposed to memorize a ton of "useless" shit like atomic weights of 50+ elements in the periodic table, logs upto 20, exponentials, factorials, avogardo constant & tons of physics constants like g and spe
730.
by dxbydt 14y ago
This is super interesting but I am really curious about its performance assuming they dont just bruteforce it to exhaust all combinationss. Tons of portfolio optimization problems can be specified very succinctly just like above but the act
731.
by dxbydt 14y ago
i read the article twice. something in it really hit home with me. i have an offer from a prof at the local univ to pursue a math phd, and i might do so in the fall. my employer is ok with it, so i get to keep my job as well. however, its a
732.
by dxbydt 14y ago
Its called a "slice", not "substring" - but your solution is the simplest to understand and the shortest to code up in Scala (using slice on lit and List.tabulate). The multiplier is much smaller than 15. If input list is n, I think 30+15*c
733.
by dxbydt 14y ago
Got a dozen solutions to inverse fizzbuzz so far, atleast two of which are O(n). Got some disturbing emails - a recruiter plans to use inverse fizzbuzz at his next interview! Dear God what monster have I unleashed...programmer community, pl
734.
by dxbydt 14y ago
Amazingly bad article, riddled with inaccuracies. Is it because the stat/math has to be toned down so much becaudse otherwise the average Forbes reader can't grok the content ? First he says, "mean and standard deviation define a normal dis
735.
by dxbydt 14y ago
Dude. I cleared it with him before I posted it. "Very funny (and an interesting post). Go ahead! also definitely let me know when it's "public" i'd like to tweet it out" - Dan Shipper.
736.
by dxbydt 14y ago
Memes are fun. I have a whole series of posts planned around Shipper if this one takes off. Shipper takes on contravariance. A Ship in a Minkowski space. Shipper and the options monster. A suboptimal algorithm to Ship Shipper around the sev
737.
Inverse Fizzbuzz(jasq.org)
167 points by dxbydt 14y ago|56 comments
738.
by dxbydt 15y ago
Yeah but he doesn't have to do straight puts. He ca do a synthetic short. The June 9 puts are a dollar, as are the 11 call. So you sell the 11 call & buy the 9 put with the proceeds. Essentially you pay absolutely nothing. On June 12, i
739.
by dxbydt 15y ago
The failure of J2ME has nothing to do with your particular preference for non-Java UIs. J2ME was a creature of the early 2000s. JSR-88 ( the J2ME spec ) was a done deal by early 2003. Implementations & maintenance releases rolled out ov
740.
by dxbydt 15y ago
Like it or not, this particular hiring filter seems to have caught on bigtime. The only downside to it is that there are people like myself who love to take a stab at solving puzzles regardless of whether they actually want the job or not.
741.
by dxbydt 15y ago
>Actors and STM are great thought experiments but real-world production stuff tends to always circumvent them for the java.util.concurrent stuff. Its a mixed picture, if you want to be honest. There are places like bofa where I've pushe
742.
by dxbydt 15y ago
> Java's original purpose was to run in machines like automatic coffee pots and TV "set top boxes from my time at sun, i remember speeches by Gosling that included microwaves and refrigerators ( i vaguely recall an example of the fridg
743.
by dxbydt 15y ago
That bias is very much justified, I'd say. scala> (1 to 10).par.foreach(x=>print(x*x+",")) 4,9,1,49,36,16,81,25,64,100, Let me know how you'd parallelize the above in Java, how many lines of code it'll take, what sy
744.
by dxbydt 15y ago
The initial condition is assigned to you randomly, from the closed interval [1,1000]. Suppose there were [1,k] spots. You are assigned an intial value from [1,k] and you then have to reach 0 before time t=k. Here's my code to solve the gene
745.
by dxbydt 15y ago
I believe the right answer is about 2.5% (0.0247) Here's some imperative scala: object particle { def main(args:Array[String]) = { val simulations = args(0).toInt val rng = new util.Random val reache
746.
by dxbydt 15y ago
uh, nope. xyz => 1 sits on seat x, 2 on seat y, 3 on seat z So the only possibilities are: 123: 1 sits on seat 1, 2 on seat 2, 3 on seat 3 213: 1 sits on seat 2, 2 on seat 1, 3 on seat 3 231: 1 sits on seat 2,
747.
by dxbydt 15y ago
Its 50%. For 3 passengers the seating possibilities are {123,213,231,321}, so 3 gets to sit on seat 3 50% of the time. For 4 passengers the seating possibilities are {1234,2134,2314,2341,2431,3241,3214,4231}, so 4 gets to sit on seat 4 50%
748.
by dxbydt 15y ago
With zero knowledge of statistics, here's how to think about it - Wilson wants to construct some score. That score can be as low as 0 and as high as 1. So he wants some interval [x,y]. The center of that interval would obviously be c = (x+y
749.
by dxbydt 15y ago
>What human can understand it? Lets start with Wilson's midpoint, since that's just high school math. def mid(upvotes:Int, downvotes:Int) = { val total = upvotes+downvotes+0.0 val up = upvotes/total val hal
750.
by dxbydt 15y ago
If the default behavior of a program is to throw an AcquiredException after a few iterations, I wouldn't call it an Exception in the first place. imho, the real exception here is the monetizeException.

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