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  • Are there programming languages that allow you to do set arithmetic on types?

    - by Will Brown
    Out of curiosity, are there languages that allow you to do set arithmetic on types to create new types? Something like: interface A { void a(); void b(); } interface B { void b(); void c(); } interface C = A & B; // has b() interface D = A | B; // has a(), b() and c() interface E = (A & B) ^ B; // has c() I know that in some languages these ideas can be expressed (i.e., Java has List<Comparable & Serializable> for the union of the interfaces) but I've never heard of a language that supports type arithmetic. Thanks!

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  • Pong Collision Help in C# w/ XNA

    - by Ramses Brown
    Edit: My goal is to have it function like this: Ball hits 1st Quarter = rebounds higher (aka Y++) Ball hits 2nd Quarter = rebounds higher (using random value) Ball hits 3rd Quarter = rebounds lower (using random value) Ball hits 4th Quarter = rebounds lower (aka Y--) I'm currently using Rectangle Collision for my collision detection, and it's worked. Now I wish to expand it. Instead of it simply detecting whether or not the paddle/ball intersect, I want to make it so that it can determine what section of the paddle gets hit. I wanted it in 4 parts, with each having a different reaction to impact. My first thought is to base it on the Ball's Y position compared to the Paddle's Y position. But since I want it in 4 parts, I don't know how to do that. So it's essentially be if (ball.Y > Paddle.Y) { PaddleSection1 == true; } Except modified so that instead of being top half/bottom half, it's 1st Quarter, etc.

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  • Cocos2d/Cocos2d-x Attaching an arrow (sprite) to another body sprite (person)

    - by Satchmo Brown
    I am trying to set up a simple bow and arrow game. When the arrow hits the enemy body, the arrow's body is deleted and the arrow sprite continues to update, keeping the position correct in relation to the enemy it hit. Picture an arrow sticking into a body and that body still rotating and moving. My problem is that the rotation is completely wrong when the enemy rotates. I know how to do this in 3d with matrix transformation but I can't seem to figure it out in 2d with Cocos. Here is my method. I save offset at which the arrow hit the enemy. Every frame, I make the rotation of the sprite match the rotation of the enemy. Then, I apply the offset I took initially which is where the arrow hit the enemy. When they rotate, they rotate about their respective anchors and I am wondering if I need to set the anchor of the arrow to the center of the sprite. Does anyone know of an easy way to do this. If not, I will try to create an algorithm where the anchor is set to the offset divided by the width and height of the sprite image hopefully giving me the correct anchor values. Then I assume I need to reposition the sprite. Does anyone have a simpler way to do this?

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  • Can I import an existing member data used in old ASP to a new ASP.NET membership database? [closed]

    - by Rick Brown
    I have an old website that I designed and still maintain using old ASP that has a membership database (MS-SQL) that I built from scratch. It is a very simple database that has all the user information in one table (including login info and personal info) and then details and other odds and ends in other tables. It is WAY past time to upgrade this to .NET, especially since I need to add a Paypal payment system into it as soon as I can. I've designed several other sites with membership in .NET, but they have all been from scratch. Is there an easy way to transition from the old ASP site to a new .NET membership database without losing the data? There are hundreds of users with thousands of records relating to those users that I'd rather not lose, if possible. Any ideas on a relatively painless way to do this?

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  • How to wrap console utils in webserver

    - by Alex Brown
    I have a big dataset (100Mbs/day) and a bunch of console a TCL/TK tools to view it - I want to turn it into a web app that I can build, and others can maintain. In long: my group runs simulations yielding 100s of Mbs of data daily, in multiple (mostly but not only) text forms. We have a bunch of scripts and tools, mostly old school 1990's style stuff requiring a 5-button mouse, as well as lots of ad-hoc scripts that engineers build out of frustration every month or so. These produces UIs, graphs, spreadsheets (various sizes), logs, event histories etc. I want to replace (or at least supplement) the xwindows / console style UI with a web-based one, so I need the following properties: pleasant to program can wrap existing command-line tools in separate views (I don't need to scrape GUIs or anything) as I port logic from the existing scripts I can create a modularised and pleasant codebase to replace it I can attach a web-ui to navigate between views - each view is likely to contain keys which might make sense to view in another I am new to building systems that have logic on the back-end and front-end of a web-server. from that point of view, they do this: backend wraps old-school executables, constructs calls into them and them takes the output and wraps it up, niceifies it and delivers it to the web client. For instance the tool might generate a number of indexed images (per invocation) which I might deliver all at once or on-demand. May (probably) need to to heavy stats on some sources. frontend provides navigation connecting multiple views, performs requests from one view for data from another (or self to self), etc. Probably will have some views with a lot of interactivity. Can people please point me towards viable solutions for this? I know it's a bit of an open question so as answers come in I hope to refine the spec until we have a good match. I guess I expect to see answers like "RoR!" "beans!" "Scala!" but please give an indication of why those are a good fit; I know nothing! I got bumped off SO for asking an open-ended question, so sorry if its OT here too (let me know). I take the policy that I use the best/closest matched language for a project but most of my team are extremely low level (ie pipeline stages and CDyn) so I don't have the peer group to know where to start.

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  • Does not documenting code result in job security? [closed]

    - by Barry Brown
    Possible Duplicate: Should you write good documentation and clean code to increase the “Bus Factor”? I often ask young programmers why they are not documenting their code. Their responses, perhaps jokingly, frequently include "job security." I hear this from experienced professionals, too. And not just in programming; network engineers and system administrators widely subscribe to this belief. Can you really ensure job security by holding the details of your work in your head rather than on paper (or in files)? What's your experience?

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  • /usr/share/zoneinfo when does the system time actually change?

    - by Steven Brown
    Please correct me if I am wrong here.... When I change my system clock this changes the file /usr/share/zoneinfo immediately, HOWEVER, the actual system time doesn't change until the next reboot because /etc/localtime then re-reads /usr/share/zoneinfo? I have seen behaviour similar to the above, whereby /usr/share/zoneinfo/ was accessed but the system time did not change until after the system had rebooted

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  • User login cycles

    - by Doug Brown
    Just install 12.04-64bit and while I can login using the guest login, I cannot with my user login: it just cycles back to the login screen. I have performed the sequence of apt-get update/upgrade and install of the nvidia-current driver, but got back that it was already in use. The password appears to be recognized, as wrong one results in an error. Have also tried switching to the 2D Unity, without other results.

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  • Trick Ubuntu into resolving a domain name locally

    - by Matthew Brown
    I have an Ubuntu box that I use for all sorts of things. One thing I really want to do is redirect a sub domain to a local script. For example thisbit.example.com should actually show the content from localhost/~USER/FAKE.thisbit.example.com/ which is a folder that Apache is running for me which contains a very simple PHP script which implements an offline version of a server script that I am testing against. But example.com should continue to behave normally as should notthisbit.example.com etc. Ideally I need to be able to switch from testing to live with minimal fuss when the time comes.

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  • Finding the displacment of a robot [closed]

    - by Jordan Brown
    I'm building a quadruped (4 legs 3 DOF) for my major work in electronics at high school. I need to know the displacement of the robot and I can't use an encoding wheel. I've done my research and I found a system where I use an accelerometer, gyroscope and a magnetometer to determine the displacement but I'm not sure how to code it. I'm using Arduino and will use compatible sensors. I would like to be able to implement something similar to this video which demonstrates the principles evaluated in this paper. I don't need to map the data on a screen, just be able to read its displacement from its last recorded position. EG. (Read Position) --- (Do "stuff") --- (Read Position) --- (Calculate displacement caused by "stuff")

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  • How do I add Different Screens to my C#/XNA Game?

    - by Ramses Brown
    I'm working on a Pong clone in XNA. Gameplay-wise, I have it where I want it to be. I want to add a title screen and some other screens to it like a menu, as well as a screen for the Winning/Losing results. I've tried the Game State Management Example on the App Hub site, but It's very complicated and I haven't been able to make sense of it. Is there a simpler way? I'm hoping for a solution that can be used in other projects too. Plus I'd like to know how to actually create menu items (basically, how do I display the different options on it, and highlight them, etc).

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  • Where can I find SPF record information for Network Solution hosted email?

    - by Steve Brown
    I have a client who has their e-mail hosted with Network Solutions and some of the e-mails they are sending are going to spam. I've searched Google for information on network solutions and SPF records but all the results have to do with "how to set up an SPF record" - which I understand how to do. The problem is that I can't find any information about what SPF records to use for network solutions hosted e-mail. I even tried lookup up spf records on networksolutions.com but it appears there are none. Where can I find SPF record information for Network Solution hosted email?

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  • secure boot windows 8 issues it hates ubuntu :(

    - by Steven Brown
    im running into issues with windows 8. ok so i disabled secure boot from my laptop. i tell it to launch from my USB with ubuntu installed on it and it wont boot. just simply light my screen and darken it. iv google the fire out of this and no use so im asking for help. im useing ubuntu 13.04. more details: well i have tryed to boot another OS (zorin) and it hates it too. i dont know why my secure boot wont shut off. if it helps i have a HP 2000.

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  • Should I be running VM's(Virtual Box) for development on the same hdd as my os or a external usb (2.0) HDD or usb (2.0) flash drive

    - by J. Brown
    I have a mac book pro (7200 rpm / 8GB ram) and I like the idea of virtualized development environments as I like to experiment with different technologies and don't like to have environmental cross contamination. I would like to know for the vm's I run (rarely 2 at time..almost always 1 vm at a time) should the virtual hdd be on my laptops native hdd or some external form (usb hdd, usb flash, or since i have mac express card based sad ?). I don't mind maxing out my ram to 16GB if thats a better option to have in the mix. Thank you

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  • Software or Photoshop plugins for professional photo album design

    - by Iain Fraser
    I am a graphic designer (among other things) and I'm used to doing magazine advertisements, brochures, posters and that sort of thing. Recently I was approached by a photographer who wants a graphic designer to produce wedding albums for him. I have already done a couple for him but I'm finding it hard to work by just arranging my layouts in Photoshop alone. It's very time consuming, but quite repetitive - especially when you're dealing with common page layouts. I know a lot of photographers use album design software to speed up the process a bit. What's the industry standard in terms of album design software?

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  • Upgrading ATI Catalyst drivers fails

    - by Iain
    I'm trying to upgrade my ATI HD 5770 graphics card drivers, as they keep crashing, but the upgrade keeps failing half way through. I have tried the full driver package and the drivers-only package. 10-5_vista64_win7_64_dd_ccc_enu.exe 10-5_vista64_win7_64_dd.exe I'm on Windows 7 Home Premium 64 bit. How can I upgrade?

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  • setting the PATH for Git (not for me)

    - by Iain
    Hi, I'm running OSX 10.6.5 with Git 1.7.1 I have git installed in a non-standard location (though that really should be the standard on a mac;-) in /Library/Frameworks/Git.framework. My own PATH is set fine, git works fine, until... I set up a pre-commit hook with a Ruby script: $ git commit -m "added some Yard documentation" .git/hooks/pre-commit: line 1: #!/usr/bin/env: No such file or directory The pre-commit.sample runs ok, so it appears that git can't find /usr/bin/env, or much else as I've tried shebanging it directly to ruby etc. Just /bin/sh is ok. So, where does Git get it's PATH? because it's not using mine or this wouldn't be happening. And more to the point, how do I get it to see /usr/bin/env ? I've tested the ruby script already, it works. Just to add: $ cat /etc/paths /usr/bin /bin /usr/sbin /sbin /usr/local/bin $ cat /etc/paths.d/git /Library/Frameworks/Git.framework/Programs The first few lines of the Ruby script (which runs via ./pre-commit or ruby pre-commit) #!/usr/bin/env ruby -wKU class String def expand_path File.expand_path self end def parent_dir File.dirname self.expand_path end end

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  • non-interactive ssh sudo... prompts for the password in plain text

    - by Iain
    I'm running some non-interactive ssh commands. The ssh authentication is taken care of fine through the ssh agent, but if I run a command that requires sudo then the password prompt in my terminal is plain text. For example: ssh remotemachine "sudo -u www mkdir -p /path/to/new/folder" will prompt me for the password in plain text. Does anyone know how I can get it to use the normal secure prompt or that I can pass the password via a switch? (as then I can set up a secure prompt on this side before I send the command) Any help is much appreciated.

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  • All MySQL Databases lost overnight

    - by Iain
    After a call from a customer to say that his website is down, I find that MySQL on our RackSpace Cloud Windows 2008 server was not running. I restarted MySQL but got the 'Access denied for user' error in the browser for all websites with MySQL database. When I look in MySql Server 5.5/data there are no folders other than mysql and performance_schema. It appears all the databases and data have been wiped. Does anyone know what might have happened and where the data has gone? To top that I just found this server is missing from our backup service. ps appears to be after windows update at 4:01 this morning.

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  • custom Progress Dialog in android?

    - by androidbase Praveen
    i follow the step in the customdialog example in the documentation. but get htis exception . any idea? 04-03 18:50:28.787: VERBOSE/Bru_Press_Tab(750): Exception in Tabsjava.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.brown/com.example.brown.Bru_Press_MostRecent}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content

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  • Flex: replace all spaces with comma

    - by Treby
    im new with regexp, so can i ask for some assistance Using string.replace function what code that can replace spaces with comma Input:The quick brown fox jumps over the lazy dog. Output:The,quick,brown,fox,jumps,over,the,lazy dog. Thanks

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