Search found 5516 matches

by Xanthir
Thu Mar 27, 2008 6:15 pm UTC
Forum: Mathematics
Topic: Why do people dislike maths so much?
Replies: 258
Views: 25827

Re: Why do people dislike maths so much?

Random sidenote: The One Roll Engine is *really* cool.
by Xanthir
Thu Mar 27, 2008 3:40 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9848
Views: 1733848

Re: Coding: Fleeting Thoughts

Any possibility of long-distance working? I've built up quite a bit of php and mysql experience, but I'm down South and wouldn't want to move.
by Xanthir
Thu Mar 27, 2008 3:38 pm UTC
Forum: Science
Topic: Entropy/Randomness in Nature
Replies: 9
Views: 2275

Re: Entropy/Randomness in Nature

Afaik, Snoof is correct. The Strong interaction is what keeps quarks together, but it only does so when its symmetry breaks at low energy levels (low being a relative term here, as last I heard the theoretical particle accelerator needed to reach the appropriate energy levels to see reunification wo...
by Xanthir
Thu Mar 27, 2008 3:29 pm UTC
Forum: Science
Topic: Biology is not "just Applied Chemistry"
Replies: 66
Views: 11060

Re: Evolution and Behavior as Emergent Properties of Biology

I know there have been posts/topics about biology being emergent vs just applied chemistry, but I wanted to bring these up specifically. I don't really see how evolution can be considered just applied chemistry. I mean, sure, the genetic basis is, but what about population genetics? And what about ...
by Xanthir
Thu Mar 27, 2008 2:44 am UTC
Forum: Gaming
Topic: Fun with Portal Guns
Replies: 233
Views: 15531

Re: Fun with Portal Guns

Even more specifically, here.
by Xanthir
Wed Mar 26, 2008 10:22 pm UTC
Forum: Mathematics
Topic: Math bloopers heard in math classes
Replies: 252
Views: 30402

Re: Math bloopers heard in math classes

I find yakk's argument convincing.
by Xanthir
Wed Mar 26, 2008 10:19 pm UTC
Forum: Religious Wars
Topic: Bug tracking system
Replies: 5
Views: 2340

Re: Bug tracking system

I've had fine experience with bugzilla, but not with any of the others, so my opinion isn't worth much on this.
by Xanthir
Wed Mar 26, 2008 10:15 pm UTC
Forum: Computer Science
Topic: Ternary C extensions
Replies: 20
Views: 3831

Re: Ternary C extensions

Hmm. I'm assuming you're using a form of ternary logic where -1 = FALSE, 1 = TRUE, and 0 = UNKNOWN. I wouldn't use if/else at all, actually. That verbage reeks of binary logic. Now, if/else should *exist*, certainly, because plenty of times you won't *need* a full trivalent boolean and just want a g...
by Xanthir
Wed Mar 26, 2008 9:57 pm UTC
Forum: Coding
Topic: The future of the Model-View-Controller architecture
Replies: 17
Views: 3137

Re: The future of the Model-View-Controller architecture

You're making some bad assumptions, which are coloring your views. The file on the server isn't the view, it's the controller. Essentially, it's a function called by apache. It returns a bytestream, which apache then sends to the client. The *view* is what the user sees when the browser renders the ...
by Xanthir
Wed Mar 26, 2008 7:37 pm UTC
Forum: Coding
Topic: Big O notation
Replies: 16
Views: 2966

Re: Big O notation

I stress it because it's correct by the definitions I learned. O(n 2 ), all by itself, really does mean worst-case n 2 performance. If we're using one of the other senses we need to say so explicitly, or ensure that it's implicit through context. It is true, though, that many times people mix worst-...
by Xanthir
Wed Mar 26, 2008 7:32 pm UTC
Forum: Coding
Topic: Bordered 2-D arrays?
Replies: 14
Views: 1474

Re: Bordered 2-D arrays?

An array would work, using the even indexes for data and the odds for borders, but you'd be wasting any odd/odd indexes (as they'd be 'corners'). A 2d linked list would also work, without the problem of wasting corners. However, this obviously has the access issues of a linked list, which may or may...
by Xanthir
Wed Mar 26, 2008 5:53 pm UTC
Forum: Coding
Topic: Big O notation
Replies: 16
Views: 2966

Re: Big O notation

Hmm. I'm not finding these explanations very satisfactory. They're either too simplistic or too complex. Let me take a crack at it. Big O notation is a way of expressing the worst-case running time of an algorithm. Another way of thinking about it is that it expresses how the running time grows as t...
by Xanthir
Tue Mar 25, 2008 11:02 pm UTC
Forum: Gaming
Topic: Fun with Portal Guns
Replies: 233
Views: 15531

Re: Fun with Portal Guns

Anyway, if you think about it, in an infinite drop system there's no ground beneath you since there's nothing through the portal but more portal. In which case there is no gravity when you are properly orientated inside the infinite drop system. This rationalizes portals to obey the conservation of...
by Xanthir
Tue Mar 25, 2008 10:58 pm UTC
Forum: Coding
Topic: Mouse movement and clicking
Replies: 10
Views: 1749

Re: Mouse movement and clicking

You using Windows? AutoHotKey'll do it for you. It does pretty much anything you could ever want in terms of controlling your computer for you.
by Xanthir
Tue Mar 25, 2008 10:41 pm UTC
Forum: Science
Topic: is the moon slowing us down?
Replies: 32
Views: 2578

Re: is the moon slowing us down?

If i understand it correctly, it has to do with high tide. If you imagine a bulge of water pointed at the moon, that bulge of water stays motionless, and it is higher than the water farther to the west. as the earth spins, it is slowed down by landmass dragging through that bulge of water. I think?...
by Xanthir
Tue Mar 25, 2008 7:07 pm UTC
Forum: Mathematics
Topic: TNT(not the explosive)
Replies: 40
Views: 9518

Re: TNT(not the explosive)

but being a power of 2 implies that all factors are 2, and thus all numbers which are a factor of b would not only have to be even, but only have factors of 2. Incorrect. You're thinking that it's doing a prime factor decomposition. It's merely finding the proper factors. The factors of 16, frex, a...
by Xanthir
Tue Mar 25, 2008 6:57 pm UTC
Forum: Logic Puzzles
Topic: Three gods - Truth-teller/Liar/Random
Replies: 9
Views: 5097

Re: Three gods - Truth-teller/Liar/Random

That's near enough the same solution that I came up with: Firstly ask the question to each of them, "are you the random one?" this will always get either 2 yes's and a no, or 2 no's and a yes 'cos the liar will always reply yes and the truth-teller will always reply no, with t...
by Xanthir
Tue Mar 25, 2008 6:54 pm UTC
Forum: Religious Wars
Topic: Track Pads vs Track Ball vs Mouse
Replies: 49
Views: 18142

Re: Track Pads vs Track Ball vs Mouse

Have you checked through all the config variables associated with it? Why does it work in FF and not IE? *Windows-tarded* I have an extension (Drag & Drop Scrolling) for FF that makes it happen. I don't have a similar one for IE. It is possible that one exists, though. Yes, within my trackball ...
by Xanthir
Tue Mar 25, 2008 6:14 pm UTC
Forum: Science
Topic: is the moon slowing us down?
Replies: 32
Views: 2578

Re: is the moon slowing us down?

You see, teh funny is that it was implied that biblical literalism is true.
by Xanthir
Tue Mar 25, 2008 6:13 pm UTC
Forum: Religious Wars
Topic: Track Pads vs Track Ball vs Mouse
Replies: 49
Views: 18142

Re: Track Pads vs Track Ball vs Mouse

I've gotten quite good with my trackball, which I originally started using because of wrist problems. It doesn't do everything I wanted, though. I use Drag Scrolling in FF, but then I get frustrated when it doesn't work elsewhere (especially when I flip into IE for a bit, as my instinct is that inte...
by Xanthir
Tue Mar 25, 2008 6:00 pm UTC
Forum: Mathematics
Topic: TNT(not the explosive)
Replies: 40
Views: 9518

Re: TNT(not the explosive)

Woo, thread necromancy! Nope, doesn't work. Remember, the expression must hold for EVERY a. For b=6, you can take a=3 and c=1 to get (3x2)=6, but it then fails the second part of the expression as 3 is not even. So, the expression as a whole fails for b=6. Basically, the first part of the expression...
by Xanthir
Tue Mar 25, 2008 5:31 pm UTC
Forum: Gaming
Topic: Portal! WILD MASS GUESSING AND THEORIZING AND BULLSHIT!
Replies: 423
Views: 69390

Re: Portal Secrets and Storylines? - ***spoiler warning***

I've been reading a *lot* of Portal stuff the last few days, with a *lot* of speculations on what's going on. This is my best guess at what happened, culled and refined from a number of separate pieces of theory. Pre-2000: Events play out as specified in the fiction at aperturescience.com, with the ...
by Xanthir
Tue Mar 25, 2008 3:29 pm UTC
Forum: Logic Puzzles
Topic: Pi litres
Replies: 17
Views: 3351

Re: Pi litres

Even given infinite time, there is really no true way to do it, as there is no value that represents exactly pi liters without approximating at some point in the process. I would even question the assumption that there is a specific "value" of pi, given that it goes on forever and ever. Y...
by Xanthir
Tue Mar 25, 2008 3:15 pm UTC
Forum: Mathematics
Topic: Amusing answers to tests
Replies: 393
Views: 54307

Re: Amusing answers to tests

I'm not looking terribly forward to getting back the coursework that concluded with this: "I do not believe that there is general method for determining how large the samples of a population with a given distribution (and no other data) need to be so that their distribution appears to be norma...
by Xanthir
Tue Mar 25, 2008 12:57 am UTC
Forum: Logic Puzzles
Topic: Three gods - Truth-teller/Liar/Random
Replies: 9
Views: 5097

Re: Three gods - Truth-teller/Liar/Random

Just to be absolutely clear on the 'random' god:
If asked a question about which both the truth and a lie would be the same answer, will he give that answer? That is, does he choose uniformly randomly between truth and lies or between yes and no?
by Xanthir
Tue Mar 25, 2008 12:54 am UTC
Forum: Science
Topic: Error analysis
Replies: 4
Views: 1017

Re: Error analysis

All you need to do is decide at what level (in terms of stdevs) you consider something 'significant'. 3 stdevs is fairly normal, as (assuming your measurements follow a normal distribution) only about 99.7% of measurements will be outside of that range (this would define 'significant' in most contex...
by Xanthir
Tue Mar 25, 2008 12:43 am UTC
Forum: Coding
Topic: The future of the Model-View-Controller architecture
Replies: 17
Views: 3137

Re: The future of the Model-View-Controller architecture

All right. MVC is really quite simple. You merely separate your data (model) from the presentation (view) from the logic (controller). The exact details are far from important, and in fact this pattern is implemented in many different ways. FRP is, as I said, essentially a way to implicitly place tr...
by Xanthir
Mon Mar 24, 2008 11:52 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9848
Views: 1733848

Re: Coding: Fleeting Thoughts

Without any testing whatsoever, I'm guessing it's similar to the distinction that Lisp makes between functions and special forms. Perhaps control structures require the parentheses delimiters for some reason. Why does it make this distinction? Who knows? I don't think there's any reason to remove th...
by Xanthir
Mon Mar 24, 2008 2:01 pm UTC
Forum: Coding
Topic: The future of the Model-View-Controller architecture
Replies: 17
Views: 3137

Re: The future of the Model-View-Controller architecture

I choose to exploit the open-endedness of my comment to say that this is included in the "higher-level languages" category, as my initial googling seems to show that frp is essentially just automagically adding triggers to every input that reevaluate the functions that use that input on a ...
by Xanthir
Mon Mar 24, 2008 1:33 pm UTC
Forum: Science
Topic: is the moon slowing us down?
Replies: 32
Views: 2578

Re: is the moon slowing us down?

Assuming astronomical trends to be linear and then extrapolating backwards to ridiculous results makes Cosmic Jesus cry.
by Xanthir
Mon Mar 24, 2008 12:53 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9848
Views: 1733848

Re: Coding: Fleeting Thoughts

Sometimes I wish someone would write quick reference cards for different languages syntaxes. It's quite annoying to have a language that you know, but don't write often enough to do the syntax by reflex 100% of the time. For example, I am primarily a Java and C# programmer, and I could write those ...
by Xanthir
Mon Mar 24, 2008 12:41 pm UTC
Forum: Coding
Topic: Game of life AI
Replies: 10
Views: 4148

Re: Game of life AI

I'll just suggest what I always do* when I have a game where the computer can play against itself: use the minimax algorithm with alpha-beta pruning to a moderate depth. For the board evaluation algorithm, use a neural network, trained via a genetic algorithm. That is, spawn random neural networks,...
by Xanthir
Sun Mar 23, 2008 9:18 pm UTC
Forum: Coding
Topic: The future of the Model-View-Controller architecture
Replies: 17
Views: 3137

Re: The future of the Model-View-Controller architecture

I doubt anything substantially different will ever emerge. MVC is basically just "Keep stuff separate so you can maintain it, jackass!" Where we apply the separation obviously will change as higher-level languages emerge (aided by smarter tools which do more automatic code generation), but...
by Xanthir
Sun Mar 23, 2008 9:14 pm UTC
Forum: Coding
Topic: Game of life AI
Replies: 10
Views: 4148

Re: Game of life AI

I'll just suggest what I always do* when I have a game where the computer can play against itself: use the minimax algorithm with alpha-beta pruning to a moderate depth. For the board evaluation algorithm, use a neural network, trained via a genetic algorithm. That is, spawn random neural networks, ...
by Xanthir
Sun Mar 23, 2008 9:08 pm UTC
Forum: Coding
Topic: I'm going to cry now. (Worst code EVAR)
Replies: 59
Views: 9591

Re: I'm going to cry now.

Is the original coder still there? If so, punch him in the face. Break his nose, if possible. He fucking deserves it, that filthy piece of trash. Any rational judge will rule it self-defense, as in you're defending yourself and innocent people from being subjected to further atrocities from the man....
by Xanthir
Sat Mar 22, 2008 7:51 pm UTC
Forum: Mathematics
Topic: Open Problems That Are Easy to Explain
Replies: 22
Views: 2797

Re: Open Problems That Are Easy to Explain

Like btilly, I really like Ramsey's Theorem when I want a simple explanation of what number theory is like and how insanely difficult even 'simple' problems can be. The quote from Erdős (in the Wikipedia article) is also hilarious. When explaining it, I usually go with a 'party' metaphor, where peop...
by Xanthir
Fri Mar 21, 2008 8:12 pm UTC
Forum: Language/Linguistics
Topic: Little editing/grammar mistakes that drive you up the wall
Replies: 784
Views: 98246

Re: Little editing mistakes that drive you up the wall

I agree with the comment about misplaced aspostrophes. I can't stand them. Particularly incorrect use of 'its'/'it's', that one really gets to me. While I understand the distinction and generally obey it in writing, I'm trying to make myself consciously *not* obey it. Seriously, it's a ridiculous l...
by Xanthir
Fri Mar 21, 2008 8:10 pm UTC
Forum: Language/Linguistics
Topic: Reverse Dictionary
Replies: 33
Views: 7225

Re: Reverse Dictionary

My brains seem to say that "rare" is the correct word there.
by Xanthir
Fri Mar 21, 2008 8:08 pm UTC
Forum: Logic Puzzles
Topic: Pi litres
Replies: 17
Views: 3351

Re: Pi litres

Heh, cool. That can be used to get an arbitrary approximation of *any* number, assuming you know its trinary expansion.
by Xanthir
Fri Mar 21, 2008 5:43 pm UTC
Forum: Mathematics
Topic: Standard Deviation and test rescaling
Replies: 4
Views: 1160

Re: Standard Deviation

That's precisely what happens. There's no way to guarantee that the raw scores will fit a certain set of parameters. Instead, they rescale the scores so that they do. It's exactly the same as normalizing the scores (setting the mean to 0 and the sd to 1).

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