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User: RackinFrackin

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Comments · 276

  1. Re:Add and truncate on Rounding Algorithms · · Score: 1

    I thought it was pretty slick too. I think that one of my professors mentioned it to me when I was in college.

  2. Add and truncate on Rounding Algorithms · · Score: 1, Flamebait

    When I need to implement rounding, I add .5 and then truncate. I believe (perhaps naively) that this is efficient because of the lack of branching.

  3. Re:Not just physicists or engineers use trig.... on Trigonometry Redefined without Sines And Cosines · · Score: 1

    if you're dealing with 500000 tons of something a hundred millionth of a pound is [not] going to matter.

    In any practical case I can think of, this is true.

    and in the real world 10000000 + 0.00000001, might as well be 10000000.

    That's a huge jump to make. These two quantities are not equal, and shouldn't be treated as such. Suppose that you have the molecular mass of a compound, but you're off by a factor of 10^(-15) (roughly the same error as your example). If you use this value to calculate the mass of a few moles of the compound, you're going to run into some serious error.

  4. Re:Yes, on Trigonometry Redefined without Sines And Cosines · · Score: 1

    I teach my students this one:

    Some Old Hippy
    Comes Around Here
    Tripping On Acid.

  5. Re:Just a thought on Nintendo Revolution Controller Revealed · · Score: 1

    That's an interesting idea, but I don't think it could replace a joystick/gamepad because the momentum of the ball would make it hard to control in games that require fast movement. The toy plane doesn't have that problem because it constrains the ball to one axis.

    I think it would make a good specialty controller for certain games where you control a character's balance or tilt a surface to make a ball roll around.

  6. Re:Beginning of a B-Movie? on UK Scientists to Create Embryo From Two Women · · Score: 1

    That would make a good B-movie. The setup is different, but much of the plot would be similar to Phoenix The Warrior.

    Shoot me for knowing this.

  7. Re:If you can automate, should you be grading? on Tools for Automated Grading? · · Score: 1

    That's allowed all the time today, and with good reason. The primary reason that math homework is given isn't so that it can be graded. It's to give the students some guided practice using the concepts that they'll be required to know.

  8. Miltope on Durable Laptop Suggestions for the Desert? · · Score: 1

    These guys build rugged computers, but I don't know if they sell to individuals.

  9. Re:Why does /. even link to this? on Top 8 Reasons HCI is in its Stone Age · · Score: 2, Funny

    Ray Charles could deliver it quicker.

  10. Re:Heh on U.S. Moves to Kill Leap Seconds · · Score: 1

    It's not true. The calendar was modified in 1972 when the first leap second was added.

  11. Re:It is wrong on Japanese Develop 'Female' Android · · Score: 1

    "Before Repliee Q1, Professor Ishiguro developed Repliee R1 which had the appearance of a five-year-old Japanese girl."

    Perhaps he was inspired by the show Small Wonder

  12. Re:Total BS on Thousands and Thousands of Hours of PVR TV · · Score: 1

    Butthead: "hey beavis...i heard that pretty soon, they're gonna have, like, 500 channels.That's gonna be cool."

    Beavis: "really? that would be cool."

    Butthead: "you know what would be really cool, though? if like, one of the channels didn't suck."

  13. Re:Tell me again now, why buy a PowerBook? on New Apples Next Week · · Score: 1

    Don't forget the Powerbook's better keyboard.

  14. Re:My fondest memory... on What Are Your Favorite Computing Memories? · · Score: 1

    When I was in college, we did the auditory equivalent of this. We'd write this simple BASIC program something like this:

    10 for a=1 to 256
    20 sound a,1
    30 next
    40 goto 10

    a would be the frequency of the note played. We'd get 7 or 8 computers doing this out of phase with each other and then leave the lab.

  15. Re:Control key placement on What Mac OS X Could Learn From Windows · · Score: 1

    That's interesting. I use my thumb for the command key, but I've never thought about it before, but it makes a lot of sense for the main special key to be thumb-activated.

    It allows you to easily use command-tab and command-backtick easily with thumb+pinky, while cut, copy, paste, and undo are still easy using the thumb and index, bird, or ring finger. It also makes things like command-shift-s easy to do with one hand.

    I guess Windows makes use of this with the Alt key for application switching.

  16. Re:Not During Tests, Though on $99 Linux Handheld with WiFi for Instant Messaging · · Score: 1

    What's to stop the students from using an ad-hoc network?

  17. Re:Diagramming Sentences on Improving Education? · · Score: 1

    I went to public school in Alabama, and we diagrammed sentences quite a bit in the 9th grade (1989). My English teacher that year gave us an intense semester of rigid grammar. Much of it seemed pointless at the time, but in retrospect it was very beneficial.

    When I look back, I see sentence-diagramming as being no different from any other string-parsing procedure. (For instance, the subject-verb-object sentence can be seen as three tokens. The subject and object can be a single-word token (i.e. a noun) or a multi-word token (such as a gerund phrase or infinitive phrase)).

    With all the parallels between grammar and formal languages/theory of compilers, I'm surprised that grammar is regarded as little as it is among CS people.

  18. Re:Wow! What a question to ask on Slashdot... on Hackers, Spelling, and Grammar? · · Score: 1

    C isn't useless--it does the work of both s and k, so I say get rid of s and k instead. That way we still have the ch sound. Sure, we lose sh, but we can use t to get that sound, like in "ratio".

  19. Re:"we" won? on Linux Chess Supercomputer Overpowers Grandmaster · · Score: 2

    I'm unfamiliar with the expert opinions, but if most or all of the grandmasters belive that the outcome is a draw then I'd believe that they are probably right. However, mathematically speaking, if it hasn't been proven then we can't claim one way or the other--we can only make a conjecture.

  20. Re:"we" won? on Linux Chess Supercomputer Overpowers Grandmaster · · Score: 2

    Chess is a drawn game by default.

    This is not known to be the case. Because we do not know the optimal strategy for playing chess, we can't know the outcome of a game between two perfect players.

    A "perfect" player could not beat you unless you made a mistake.

    If two perfect players always draw their game, then this is true; however, if the game favors white, then there's nothing that black can do--even if he knows the optimal strategy--to win the game.

  21. -1: Wrong on Apple Powerbook and iBook Battery Recall · · Score: 2, Informative

    Apple's page (the one linked in the post) clearly states that the recall is for the 15 inch aluminum Powerbook only.

    Copied directly from Apple's main page:

    Important Safety Recall -- Rechargeable Batteries for 12-inch iBook G4, 12-inch and 15-inch PowerBook G4

  22. Re:Fine until they take the subway on Tracking Sex Offenders via GPS for Life · · Score: 1

    Is Tri-Rail completely above ground?

  23. Re:everyone is an apple fan at some point. on Windows Journalist Takes On Tiger · · Score: 1

    I agree with your point, but you're making a very common error--confusing converse with inverse.

    The conditional statement you assert is "if the hardware and OS are tied together, then things work well." P -> Q

    The converse of this would be "if things work well, then the hardware and OS are tied together." Q -> P

    The inverse of the original statement would be "If the hardware and the OS are not tied together, then thing do not work well." ~P -> ~Q

  24. Re:The Plane capture on Satellite Easter Eggs · · Score: 1

    Here's another picture where you can see what appears to be multiple images of the same plane. Well, actually in this picture you can only see it once, but if you scroll east you can see it five more times, each one progressively higher.

    It could be five different planes, but I doubt it.

  25. Re:Running out of cat names... on Apple Announces Tiger Release Date · · Score: 2, Funny

    I'm ready for OS X Liger. It's pretty much my favorite OS.