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  • Today's $10 Deal from APress - Next-Generation Business Intelligence Software with Silverlight 3

    - by TATWORTH
    Today's $10 deal from Apress is " Next-Generation Business Intelligence Software with Silverlight 3 Business intelligence (BI) software is the code and tools that allow you to view different components of a business using a single visual platform, making comprehending mountains of data easier. BI is everywhere. Applications that include reports, analytics, statistics, and historical and predictive modeling are all examples of BI applications. Currently, we are in the second generation of BI software, called BI 2.0. This generation is focused on writing BI software that is predictive, adaptive, simple, and interactive. Next-Generation Business Intelligence Software with Rich Internet Applications brings you up to speed with the latest BI concepts."

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  • Formatting Google Search Result [closed]

    - by user5775
    Possible Duplicate: What are the most important things I need to do to encourage Google Sitelinks? Hello, I am new to search engine optimization. I am working on customizing how my results appear in Google as best as possible. I have learned about the meta tags to customize the text summary. However, I have some hierarchical parts to my website. When a result appears related to the "tip-of-the-iceberg", I would like to show links related to the "child" pages. For instance, if you Google "Walmart" you will see the following links listed with the result: Electronics TV & Video Departments Furniture Toys Girls Living Room Computers Is there any way that I can help Google determine which links to show and the text to display for these child links on my site? Or is this something that Google automatically generates? thanks!

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  • Passing variable from SharePoint to external website

    - by TechDaddyK
    My company has a SharePoint site that is administered by the IT department (versus the Web Developer... go figure!). We have partnered with a vendor that has built a site for our staff to order customized stationery, etc. I need to create a link on the SharePoint site that will take the user to the external site but identify them individually. The vendor is suggesting this format: https://www.VENDORSITE.com/UI/Profile.hcf?id=a02b8106-4115-47cd-bca7-ce4dd447ef89&username=<user name>&password=<password>&name1=<first name>&name2=<last name>&email=<email> Here's the problem: I don't know how to pass that info, or even a single variable, from the SharePoint site to the external site. I would appreciate ANY suggestions.

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  • How do you explain commented-out code to a non-programmer? [closed]

    - by whirlwin
    What is the quickest and most comprehensible way to explain to a non-programmer what commented-out code is? When I mentioned it in a conversation to non-programmers, they seemed lost. Such people could for instance be graphical designers, when working on the same team to make an application. Typically I would need to mention what I will be/currently am working with during an update meeting. At first I thought about substituting commented-out with unused code. While it is true to some degree, it is also very ambiguous. If you are wondering, I am working with legacy code with commented-out code. This leads to my question: "how do you explain commented-out code to a non-programmer?"

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  • Dynamically rewrite URLs upon the user's selection - is it possible?

    - by jitzo
    In my PHP based web application, there's a form that generates a URL according to the user's selection. The form has 7 different fields, each one of them affects the final URL, none of them is mandatory. The final URL can be: /field1/user_setting_of_field1/field3/user_setting_of_field3/field6/user_setting_of_field6/ or just: /field4/user_setting_of_field4 these URLs should be rewritten to- /results.php?field1=user_setting_of_field1&field3=user_setting_of_field3&field6=user_setting_of_field6 and: /results.php?field4=user_setting_of_field4 Is it possible to create a single rewrite rule that will cover these variations? I'd hate to create different rewrite rule for every possible scenario, it'll take forever... I'm currently developing the app on a Windows machine with IIS 7.5, but will eventually deploy it to an Apache server. Is it possible in both? I currently need to solve it for the IIS environment, and later on for Apache.

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  • How to cross-compile programs for the Raspberry Pi with gcc?

    - by InkBlend
    I am fond of using gcc to compile small little C and C++ programs on my main computer. However, I also have a Raspberry Pi, and, being a 700-MHz single-core computer, I would prefer to not have to do my development work on it every time I want to create a binary for it. How (for I know that there's a way) do I cross-compile my program for the Raspberry Pi using my x86 laptop? And is there a way that I may compile C(++) programs on the Pi but produce an x86 binary? If it's any help, "The SoC is a Broadcom BCM2835. This contains an ARM1176JZFS, with floating point..." (according to the official Raspberry Pi FAQ).

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  • Increasing efficiency of N-Body gravity simulation

    - by Postman
    I'm making a space exploration type game, it will have many planets and other objects that will all have realistic gravity. I currently have a system in place that works, but if the number of planets goes above 70, the FPS decreases an practically exponential rates. I'm making it in C# and XNA. My guess is that I should be able to do gravity calculations between 100 objects without this kind of strain, so clearly my method is not as efficient as it should be. I have two files, Gravity.cs and EntityEngine.cs. Gravity manages JUST the gravity calculations, EntityEngine creates an instance of Gravity and runs it, along with other entity related methods. EntityEngine.cs public void Update() { foreach (KeyValuePair<string, Entity> e in Entities) { e.Value.Update(); } gravity.Update(); } (Only relevant piece of code from EntityEngine, self explanatory. When an instance of Gravity is made in entityEngine, it passes itself (this) into it, so that gravity can have access to entityEngine.Entities (a dictionary of all planet objects)) Gravity.cs namespace ExplorationEngine { public class Gravity { private EntityEngine entityEngine; private Vector2 Force; private Vector2 VecForce; private float distance; private float mult; public Gravity(EntityEngine e) { entityEngine = e; } public void Update() { //First loop foreach (KeyValuePair<string, Entity> e in entityEngine.Entities) { //Reset the force vector Force = new Vector2(); //Second loop foreach (KeyValuePair<string, Entity> e2 in entityEngine.Entities) { //Make sure the second value is not the current value from the first loop if (e2.Value != e.Value ) { //Find the distance between the two objects. Because Fg = G * ((M1 * M2) / r^2), using Vector2.Distance() and then squaring it //is pointless and inefficient because distance uses a sqrt, squaring the result simple cancels that sqrt. distance = Vector2.DistanceSquared(e2.Value.Position, e.Value.Position); //This makes sure that two planets do not attract eachother if they are touching, completely unnecessary when I add collision, //For now it just makes it so that the planets are not glitchy, performance is not significantly improved by removing this IF if (Math.Sqrt(distance) > (e.Value.Texture.Width / 2 + e2.Value.Texture.Width / 2)) { //Calculate the magnitude of Fg (I'm using my own gravitational constant (G) for the sake of time (I know it's 1 at the moment, but I've been changing it) mult = 1.0f * ((e.Value.Mass * e2.Value.Mass) / distance); //Calculate the direction of the force, simply subtracting the positions and normalizing works, this fixes diagonal vectors //from having a larger value, and basically makes VecForce a direction. VecForce = e2.Value.Position - e.Value.Position; VecForce.Normalize(); //Add the vector for each planet in the second loop to a force var. Force = Vector2.Add(Force, VecForce * mult); //I have tried Force += VecForce * mult, and have not noticed much of an increase in speed. } } } //Add that force to the first loop's planet's position (later on I'll instead add to acceleration, to account for inertia) e.Value.Position += Force; } } } } I have used various tips (about gravity optimizing, not threading) from THIS question (that I made yesterday). I've made this gravity method (Gravity.Update) as efficient as I know how to make it. This O(N^2) algorithm still seems to be eating up all of my CPU power though. Here is a LINK (google drive, go to File download, keep .Exe with the content folder, you will need XNA Framework 4.0 Redist. if you don't already have it) to the current version of my game. Left click makes a planet, right click removes the last planet. Mouse moves the camera, scroll wheel zooms in and out. Watch the FPS and Planet Count to see what I mean about performance issues past 70 planets. (ALL 70 planets must be moving, I've had 100 stationary planets and only 5 or so moving ones while still having 300 fps, the issue arises when 70+ are moving around) After 70 planets are made, performance tanks exponentially. With < 70 planets, I get 330 fps (I have it capped at 300). At 90 planets, the FPS is about 2, more than that and it sticks around at 0 FPS. Strangely enough, when all planets are stationary, the FPS climbs back up to around 300, but as soon as something moves, it goes right back down to what it was, I have no systems in place to make this happen, it just does. I considered multithreading, but that previous question I asked taught me a thing or two, and I see now that that's not a viable option. I've also thought maybe I could do the calculations on my GPU instead, though I don't think it should be necessary. I also do not know how to do this, it is not a simple concept and I want to avoid it unless someone knows a really noob friendly simple way to do it that will work for an n-body gravity calculation. (I have an NVidia gtx 660) Lastly I've considered using a quadtree type system. (Barnes Hut simulation) I've been told (in the previous question) that this is a good method that is commonly used, and it seems logical and straightforward, however the implementation is way over my head and I haven't found a good tutorial for C# yet that explains it in a way I can understand, or uses code I can eventually figure out. So my question is this: How can I make my gravity method more efficient, allowing me to use more than 100 objects (I can render 1000 planets with constant 300+ FPS without gravity calculations), and if I can't do much to improve performance (including some kind of quadtree system), could I use my GPU to do the calculations?

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  • Can we grant sudo to an already opened application?

    - by james
    So, can we grant sudo to an already opened application ? I wish to first open an application as normal user and incase if i need root permissions on it i wish to grant su without restarting the application.. I tried opening an application and then type "sudo appname" in terminal, but that opens a new app window retaining normal user permissions on old app window. Say, i want to check and edit /etc/apt/sources.list . I open a filemanager and go to the path and click on sources.list which opens a text editor with that file in view. If i feel i need to edit that, then i want to grant sudo to that instance of text editor rather than opening a new root text editor and browsing the entire path.

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  • Is it time to deprecate synchronized, wait and notify?

    - by OldCurmudgeon
    Is there a single scenario (other than compatibility with ancient JVMs) where using synchronized is preferable to using a Lock? Can anyone justify using wait or notify over the newer systems? Is there any algorithm that must use one of them in its implementation? I see a previous questions that touched on this matter but I would like to take this a little further and actually deprecate them. There are far too many traps and pitfalls and caveats with them that have been ironed out with the new facilities. I just feel it may soon be time to mark them obsolete.

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  • Should package structure closely resemble class hierarchy?

    - by Panzercrisis
    Pretty simple question. Should package structure closely resemble class hierarchy? If so, how closely? Why or why not? For instance, let's say you've got class A and class B, plus class AFactory and class BFactory. You put class A and class B in the package com.something.elements, and you put AFactory and BFactory in com.something.elements.factories. AFactory and BFactory would be further down the hierarchy package-wise, but they'd be further up class-wise. Is this sort of thing a good idea or a bad idea?

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  • Search for the Content You Don't Want to Miss

    - by Oracle OpenWorld Blog Team
    by Meg Ehman The Oracle OpenWorld 2013 content catalog is now live—more accessible than ever with all you need to know about sessions, speakers, demos, labs, user groups, exhibitors, and more. This year, for the first time, you’ll find all Oracle conference content in a single catalog. You can browse the entire catalog at one time, or filter your search by conference, product, session, speaker, or other keywords.  If you find a session you think friends or colleagues would like to attend, share it with them through Facebook or Twitter. Start checking out Oracle OpenWorld content now to make sure you know how to plan your week at the conference. Then when Schedule Builder goes live in early August you’ll be ready to sign up quickly to have the best chance for getting into all of the great sessions you want to.   Search Content Catalog NowLearn More about Oracle OpenWorldRegister for Oracle OpenWorld

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  • Avoiding "double" subscriptions

    - by john smith
    I am working on a website that requires a bit of marketing; let me explain. This website is offering a single, say, iTunes 50$ voucher to a lucky winner. To be entered in the draw, you need to invite (and has to join) at least one friend to the website. Pretty straightforward. Now, of course it would be easy for anyone to just create a fake account and invite that account so, I was thinking of some other way to somehow find out of possible cheating. I was thinking of an IP check on the newly subscribed (invited) user, and if there is the same IP logged in the last 24 hours, and if that's the case, investigate more about it. But I was thinking that maybe there is a more clever way around this issue. Has anyone ever though about this? What other solutions did you try? Thanks in advance.

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  • Data architecture for event log metrics?

    - by elliot42
    My service has a large ongoing number of user events, and we would like to do things like "count occurrence of event type T since date D." We are trying to make two basic decisions: What to store? Storing every event vs. only storing aggregates (Event log style) log every event and count them later, vs. (Time-series style) store a single aggregated "count of event E for date D" for every day Where to store the data In a relational database (particularly MySQL) In a non-relational (NoSQL) database In flat log files (collected centrally over the network via syslog-ng) What is standard practice / where can I read more about comparing the different types of systems? Additional details: The total event stream is large, potentially hundreds of thousands of entries per day But our current need is only to count certain types of events within it We don't necessarily need real-time access to the raw data or aggregation results IMHO, "log all events to files, crawl them at a later time to filter and aggregate the stream" is a pretty standard UNIX Way, but my Rails-y compatriots seem to think that nothing is real unless it's in MySQL.

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  • css - use universal '*' selector vs. html or body selector?

    - by Michael Durrant
    Applying styles to the body tag will be applied to the whole page, so body { font-family: Verdana } will be applied to the whole page. This could also be done with * {font-family: Verdana} which would apply to all elements and so would seem to have the same effect. I understand the principle that in the first instance the style is being applied to one tag, body for the whole page whereas in the second example the font is being applied against each individual html elements. What I am asking is what is the practical difference in doing that, what are the implications and what is a reason, situation or best practice that leads to using one over another. One side-effect is certainly speed (+1 Rob). I am most interested in the actual reason to choose one over the other in terms of functionality.

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  • Visual Studio Editor Choosing System

    This document gives an overview of how the Visual Studio editor choosing system works, and as an example discusses the XML Editors choosing system.  Visual Studio has the ability to associate multiple editors with a single a file extension.  For instance, .xaml files have multiple editor implementations associated with them. This raises the question of how Visual Studio chooses a specific editor implementation when asked to open a file. his document gives an overview of how the Visual Studio...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Visual Studio Editor Choosing System

    This document gives an overview of how the Visual Studio editor choosing system works, and as an example discusses the XML Editors choosing system.  Visual Studio has the ability to associate multiple editors with a single a file extension.  For instance, .xaml files have multiple editor implementations associated with them. This raises the question of how Visual Studio chooses a specific editor implementation when asked to open a file. his document gives an overview of how the Visual Studio...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Is it relevant to warn about truncating real constants to 32 bits?

    - by zneak
    I'm toying around with LLVM and looking at what it would take to make yet another strongly-typed language, and now that I'm around the syntax, I've noticed that it seems to be a pet peeve of strongly typed language to warn people that their constants won't fit inside a float: // both in Java and C# float foo = 3.2; // error: implicitly truncating a double into a float // or something along these lines Why doesn't this work in Java and C#? I know it's easy to add the f after the 3.2, but is it really doing anything useful? Must I really be that aware that I'm using single-precision reals instead of double-precision reals? Maybe I'm just missing something (which, basically, is why I'm asking). Note that float foo = [const] is not the same thing as float foo = [double variable], where requiring the cast seems normal to me.

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  • FTP won't open a connection to client

    - by Ben
    I am running Windows server 2008 on Ubuntu server 12.04.1 via devstack and I am trying to download a file from an ftp server using the windows command line ftp client. When I run the ftp get command I get the following error message: 500 I won't open a connection to 10.0.0.2 (only to XX.XX.XX.XX) 425 No data connection 10.0.0.2 is the internal IP address of the instance, whereas XX.XX.XX.XX is the external address. Is there anyway to make the ftp client use the external address for the data connection, or alternatively have the client establish the connection? Thanks

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  • Can I copy large files faster without using the file cache?

    - by Veazer
    After adding the preload package, my applications seem to speed up but if I copy a large file, the file cache grows by more than double the size of the file. By transferring a single 3-4 GB virtualbox image or video file to an external drive, this huge cache seems to remove all the preloaded applications from memory, leading to increased load times and general performance drops. Is there a way to copy large, multi-gigabyte files without caching them (i.e. bypassing the file cache)? Or a way to whitelist or blacklist specific folders from being cached?

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  • How often do you use google, to answer programming relatated questions? [closed]

    - by Mercfh
    I hope this isn't too subjective, but it is programming related and Im curious. Alot of times I feel.......dumb for lack of a better word when I have to look something up. Alot of times I forget all the specificity of a language and have to look up something like "Doing XXX in C++" for instance, or something along the lines of that. How often do you guys as Programmers both Professionally and On your own have to use google to look up something. Or do most people just kind of remember these things. I guess what Im really asking is, do you often have to use google or other web-search sites to remember how to do what is seemingly "simple" things with languages but you've just forgotten? Please tell me im not the ONLY one.

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  • HTML5 - check if font has loaded

    - by espais
    At present I load my font for my game in with @font-face For instance: @font-face { font-family: 'Orbitron'; src: url('res/orbitron-medium.ttf'); } and then reference it throughout my JS implementation as such: ctx.font = "12pt Orbitron"; where ctx is my 2d context from the canvas. However, I notice a certain lag time while the font is downloaded to the user. Is there a way I can use a default font until it is loaded in? Edit - I'll expand the question, because I hadn't taken the first comment into account. What would the proper method of handling this be in the case that a user has disabled custom fonts?

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  • clone() only partially doable; how to react?

    - by hllnll
    Suppose we have a class-hierarchy whose base class B requires a clone() method to be defined in its derivations. Whilst this works perfectly for most of them there is this one derivation X that holds an optional reference to a resource/object that can only be referenced from one instance of X. Whilst the rest of X can be cloned without problems this reference would have to be set to null/nil/nullptr. What is the correct way to handle this situation? X::clone() could throw an UncloneableException. Though this would be correct, it is not satisfying. Set the reference to null/nil/nullptr and leave no notice of it. The user of X has to know about Xs "particularities". Require derivations of B to define B::nearestClone(): the user of B has to be aware that the return value might not be a 1:1 clone. Something else?

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  • How can I locate the frames of a spritesheet PNG based on this PLIST data?

    - by kitsune
    Someone asked me to reskin a certain game. Now he only sent me the whole sprite PNG and PLIST files of the sprites. He instructed me to rename each sprite with the same name corresponding to each original sprite. The problem is, he gave me the whole sprite sheet instead of each individual sprite and the PLIST. Now yes, I can read the PNG filenames from the PLIST, but I cannot rename the reskin sprites I did because I'm not sure which sprite is boy_gun_3_3.png; there are multiple guns, I don't know which is which. Is there a way to extract individual accurately named individual PNG files from the single sprite sheet using the PLIST?

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  • Best practice, or generally best way to set up web-hosting server, permissions, etc. [closed]

    - by Jagot
    Hi, I'm about to set up a server upon which a friend and I will be hosting web sites, and I'll be using Debian. I've set up a LAMP solution many times just to using for local testing purposes, but never for actual production use. I was wondering what are the best practices are in terms of setting the server up, in reference specifically to accessing the web root directory. A couple of the options I have seen: Set up a single user account on the server for us both to use and use a virtual host to point to the somewhere in the home directory, e.g. /home/webdev/www. Set each of us up a user account, and grant permissions in some way to /var/www (What would be the best way? Set up a new group?) I want to get this right when I first set this up as there won't be any going back for a while once our first site is up and running. Appreciate any guidance in advance.

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  • Feed Reader Fix

    - by Geertjan
    In the FeedReader sample (available in the New Projects window), there's this piece of code: private static Feed getFeed(Node node) { InstanceCookie ck = node.getLookup().lookup(InstanceCookie.class); if (ck == null) { throw new IllegalStateException("Bogus file in feeds folder: " + node.getLookup().lookup(FileObject.class)); } try { return (Feed) ck.instanceCreate(); } catch (ClassNotFoundException ex) { Exceptions.printStackTrace(ex); } catch (IOException ex) { Exceptions.printStackTrace(ex); } return null; } Since 7.1, for some reason, the above doesn't work. What does work, and is simpler, is this, instead of the above: private static Feed getFeed(Node node) { Feed f = FileUtil.getConfigObject("RssFeeds/sample.instance", Feed.class); if (f == null) { throw new IllegalStateException("Bogus file in feeds folder: " + node.getLookup().lookup(FileObject.class)); } return f; } So, the code needs to be fixed in the sample.

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