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• "Programming error" exceptions - Is my approach sound?

  - by Medo42

  I am currently trying to improve my use of exceptions, and found the important distinction between exceptions that signify programming errors (e.g. someone passed null as argument, or called a method on an object after it was disposed) and those that signify a failure in the operation that is not the caller's fault (e.g. an I/O exception). As far as I understand, it makes little sense for an immediate caller to actually handle programming error exceptions, he should instead assure that the preconditions are met. Only "outer" exception handlers at task boundaries should catch them, so they can keep the system running if a task fails. In order to ensure that client code can cleanly catch "failure" exceptions without catching error exceptions by mistake, I create my own exception classes for all failure exceptions now, and document them in the methods that throw them. I would make them checked exceptions in Java. Now I have a few questions: Before, I tried to document all exceptions that a method could throw, but that sometimes creates an unwiedly list that needs to be documented in every method up the call chain until you can show that the error won't happen. Instead, I document the preconditions in the summary / parameter descriptions and don't even mention what happens if they are not met. The idea is that people should not try to catch these exceptions explicitly anyway, so there is no need to document their types. Would you agree that this is enough? Going further, do you think all preconditions even need to be documented for every method? For example, calling methods in IDisposable objects after calling Dispose is an error, but since IDisposable is such a widely used interface, can I just assume a programmer will know this? A similar case is with reference type parameters where passing null makes no conceivable sense: Should I document "non-null" anyway? IMO, documentation should only cover things that are not obvious, but I am not sure where "obvious" ends.

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• How to organize music files?

  - by newbie

  I'm trying to re-organize my music files. I copied them from my iPod before it died, so they have funky names, like DGEDH.mp3. I tried using a Windows utility to rename them from their ID3 tags, but it didn't work very well--it created a bunch of folders (one for each album in theory, but more like 7 or 8 in reality) and renamed the files with non-English characters. Most of the files are MP3s, but there's at least one or two other file types as well. I'd like to copy them to a new folder and try a Ubuntu utility to rename and re-organize them. In Windows, this would be straightforward--I'd use the Search function (with no file name specified) to list all of the files in the main folder and its subfolders, then drag and drop them to the new folder. What's the easiest way to accomplish the same thing in Ubuntu? The GUI search doesn't seem to accept wildcard characters, and I don't remember all of the file types I have, so it's not as simple as searching for "mp3". Many thanks!

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• Best practices for App Idea ownership and shares

  - by JOG

  I am developing apps on my sparetime. I am the sole developer, and two non-programmer friends of mine provide vision, content, algorithms and ideas. We always agree happily on all the features, todos and prioritizations. But naturally, coding it is the biggest part. When selling, we agree on splitting profit equally, that is 33% each. But version 1.0 naturally does not sell much. And I go on to try to make the app more viral. This includes tons of stuff where the others are of little help. Examples: Adding support for sharing, facebook connect, gameifying, letting users add content, home page, support, maintenance, server services to make it easier for to update content. The list is long. Suddenly I will be doing 100% of a lot of work but only "own" a third of the income. My friends may either "fade out" of the project after 1.0, or they continue to contribute, but with less value and I would rather exchange them for more programmers or graphic designers. The effort they made to version 1.0 is worth a lot to the app and I realize I would have never done it without them. But I am doing all the work in the end. It is hard to negotiate about splitting 90, 5, 5 instead of 33% each, because the idea is still theirs. How to solve this? What are the best practices to regard the ownership of the app? What kind of agreements could I make that make it beneficial and motivational for me to continue developing the app?

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• What packages can i use to unroll a complete store with customer service?

  - by acidzombie24

  I havent bought the server yet (possible VPS) but i am thinking about using linux with apache and mono for asp.net support. I don't know much about this. What packages can i use together to have a store with customer support? What i like is 1) A store to purchase one item (its digital). More may be possible but they are likely to be addons which need the first item. 2) Have the the store send messages to my app which will generate registration key and deliver the digital item. 3) Create an account for that customer on a support site used for tickets 4) A Forum. I'd like a private forum for customers and may want their account to be disabled when their product license has expired. 5) A mailing list. I like non customers be able to subscribe to a list and i'd like to know if any customers are on it so i can send different emails to each if desired. Are there packages that make any of these easy? I dont mind writing glue code if i need to but i havent tried any stores, mailing list, ticket system but have installed a forum once long ago. My mail server will likely be through google apps.

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• Designing a flexible tile-based engine

  - by Vee

  I'm trying to create a flexible tile-based game engine to make all sorts of non-realtime puzzle games, just as Bejeweled, Civilization, Sokoban, and so on. The first approach I had was to have a 2D array of Tile objects, and then have classes inheriting from Tile that represented the game objects. Unfortunately that way I couldn't stack more game elements on the same Tile without having a 3D array. Then I did something different: I still had the 2D array of Tile objects, but every Tile object contained a List where I put and different entities. This worked fine until 20 minutes ago, when I realized that it's too expensive to do many things, look at this example: I have a Wall entity. Every update I have to check the 8 adjacent Tiles, then check all of the entities in the Tile's List, check if any of those entities is a Wall, then finally draw the correct sprite. (This is done to draw walls that are next to each other seamlessly) The only solution I see now is having a 3D array, with many layers, that could suit every situation. But that way I can't stack two entities that share the same layer on the same tile. Whenever I want to do that I have to create a new layer. Is there a better solution? What would you do?

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• Session serialization in JavaEE environment

  - by Ionut

  Please consider the following scenario: We are working on a JavaEE project for which the scalability starts to become an issue. Up until now, we were able to scale up but this is no longer an option. Therefore we need to consider scaling out and preparing the App for a clustered environment. Our main concern right now is serializing the user sessions. Sadly, we did not consider from the beginning the issue and we are encountering the following excetion: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.apache.catalina.session.StandardSessionFacade I did some research and this exception is thrown because there are objects stored on the session which does not implement the Serializable interface. Considering that all over the app there are quite a few custom objects which are stored on the session without implementing this interface, it would require a lot of tedious work and dedication to fix all these classes declaration. We will fix all this declarations but the main concern is that, in the future, there may be a developer which will add a non Serializable object on the session and break the session serialization & replication over multiple nodes. As a quick overview of the project, we are developing using a home grown framework based on Struts 1 with the Servlet 3.0 API. This means that at this point, we are using the standard session.getAttribute() and session.setAttribute() to work with the session and the session handling is scattered all over the code base. Besides updating the classes of the objects stored on session and making sure that they implement the Serializable interface, what other measures of precaution should we take in order to ensure a reliable Session replication capability on the Application layer? I know it is a little bit late to consider this but what would be the best practice in this case? Furthermore, are there any other issues we should consider regarding this transition? Thank you in advance!

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• Working with Reporting Services Filters–Part 5: OR Logic

  - by smisner

  When you combine multiple filters, Reporting Services uses AND logic. Once upon a time, there was actually a drop-down list for selecting AND or OR between filters which was very confusing to people because often it was grayed out. Now that selection is gone, but no matter. It wouldn’t help us solve the problem that I want to describe today. As with many problems, Reporting Services gives us more than one way to apply OR logic in a filter. If I want a filter to include this value OR that value for the same field, one approach is to set up the filter is to use the IN operator as I explained in Part 1 of this series. But what if I want to base the filter on two different fields? I  need a different solution. Using the AdventureWorksDW2008R2 database, I have a report that lists product sales: Let’s say that I want to filter this report to show only products that are Bikes (a category) OR products for which sales were greater than $1,000 in a year. If I set up the filter like this: Expression Data Type Operator Value [Category] Text = Bikes [SalesAmount]   > 1000 Then AND logic is used which means that both conditions must be true. That’s not the result I want. Instead, I need to set up the filter like this: Expression Data Type Operator Value =Fields!EnglishProductCategoryName.Value = "Bikes" OR Fields!SalesAmount.Value > 1000 Boolean = =True The OR logic needs to be part of the expression so that it can return a Boolean value that we test against the Value. Notice that I have used =True rather than True for the value. The filtered report appears below. Any non-bike product appears only if the total sales exceed $1,000, whereas Bikes appear regardless of sales. (You can’t see it in this screenshot, but Mountain-400-W Silver, 38 has sales of $923 in 2007 but gets included because it is in the Bikes category.)

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• Making an advertising server ads from different ad networks

  - by John

  In India there are many ad-networks(other than Adsense) who pay per acquisition or per lead. So Javascript ad code is not required(as fraud clicks don't matter as long as one converts). So an ad network will have many companies and each company will have many banner sizes for ads. Also suddenly any ad may be stopped just because company's target has met. Which is a common nuisance since if we don't remove those url's then that company will get conversions for free. I've a dozen sites and removing the ads are difficult every now and then. Also CPA based ads may not convert at all. That means I'll need to remove non-performing ads regularly. I've gone through: How can I show multiple ad networks on my site? . I've also visited DFP solution but without Adsense they wouldn't let me open account. I want to make an ad server wherein I'll feed new ads (banner image + link for click). I want to maintain categories there like ( shoes, phones, books etc). So if an ad is paused - i'll simply remove/pause the ad there while other ads in the category keep running. Also changing ad code within sites will no more be required. For example - let me have an ad category "clothing" where I can add ads from different companies. So if one of my site requests an ad from there it'll randomly select an ad in this category and return it to site for display. Removing/adding ads within this category will not affect the site requesting those ads. Any idea how to implement it?

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• the OpenJDK group at Oracle is growing

  - by john.rose

  p.p1 {margin: 0.0px 0.0px 12.0px 0.0px; font: 12.0px Times} span.s1 {text-decoration: underline ; color: #0000ee} The OpenJDK software development team at Oracle is hiring. To get an idea of what we’re looking for, go to the Oracle recruitment portal and enter the Keywords “Java Platform Group” and the Location Keywords “Santa Clara”.  (We are a global engineering group based in Santa Clara.)  It’s pretty obvious what we are working on; just dive into a public OpenJDK repository or OpenJDK mailing list. Here is a typical job description from the current crop of requisitions: The Java Platform group is looking for an experienced, passionate and highly-motivated Software Engineer to join our world class development effort. Our team is responsible for delivering the Java Virtual Machine that is used by millions of developers. We are looking for a development engineer with a strong technical background and thorough understanding of the Java Virtual Machine, Java execution runtime, classloading, garbage collection, JIT compiler, serviceability and a desire to drive innovations. As a member of the software engineering division, you will take an active role in the definition and evolution of standard practices and procedures. You will be responsible for defining and developing software for tasks associated with the developing, designing and debugging of software applications or operating systems. Work is non-routine and very complex, involving the application of advanced technical/business skills in area of specialization. Leading contributor individually and as a team member, providing direction and mentoring to others. BS or MS degree or equivalent experience relevant to functional area. 7 years of software engineering or related experience.

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• Ranking drop after using reverse proxy for blog subdirectory and robots.txt for old blog subdomain

  - by user40387

  We have a 3Dcart store and a WordPress blog hosted on a separate server. Originally, we had a CNAME set up to point the blog to http://blog.example.com/. However, in our attempt to boost link-based and traffic-based authority on the main site, we've opted to do a reverse proxy to http://www.example.com/blog/. It’s been about two months since we finished the reverse proxy migration. It appears that everything is technically working as intended, including some robots and sitemap changes; the new URLs are even generating some traffic, as indicated on Google Analytics. While Google has been indexing the new URL locations, they’re ranking very poorly, even for non-competitive, long-tail keywords. Meanwhile, the old subdomain URLs are still ranking mostly as well as they used to (even though they aren’t showing meta titles and descriptions due to being blocked by robots.txt). Our working theory is that Google has an old index of the subdomain URLs, and is considering the new URLs to be duplicate content, since it’s being told not to crawl the subdomain and therefore can’t see the rel canonicals we have in place. To resolve this, we’ve updated the subdomain’s robot.txt to no longer block crawling and indexing. Theoretically, seeing the canonical tag on the subdomain pages will resolve any perceived duplicate content issues. In the meantime, we were wondering if anyone would have any other ideas. We are very concerned that we’ll be losing valuable traffic, as we’re entering our on season at the moment.

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• Can't connect to hidden network with BCM4313

  - by poomerang

  The wireless works fine with all the other wi-fi nets I have tried, the only problem is with this hidden network. I should add it's the only hidden network I've tried, so I am not sure if the problem is it being hidden or somethings else, but I've checked the settings of NetworkManager against another Ubuntu system (which can connect) and they appear to be the same, passphrase included. The network is using WPA2 Personal with AES encryption, I don't know how to check this setting but I believe it's the usual for WPA2, and therefore usually not a problem. Also, I can connect through ethernet, which should exclude any blacklisting of my device, I believe. I usually use brcmsmac drivers, I've tried also STA but the result is the same. I've also tried the suggestion from Unable to connect to hidden SSID with no luck output of lspci -v is 03:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) Subsystem: Askey Computer Corp. Device 7175 Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at d4000000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: brcmsmac Kernel modules: bcma, brcmsmac

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• CodePlex Daily Summary for Tuesday, May 20, 2014

  CodePlex Daily Summary for Tuesday, May 20, 2014Popular ReleasesEdiFabric: Release 3.1: Fixed parse tree generation for the latest validation schemasCompare .NET Objects: Version 2.03.0.0: Support for System.Drawing.Font type New Option to Ignore Unknown Object TypesQuickMon: Version 3.11: This release adds some major changes to the core monitoring engine. 1. Polling overrides: Each collector entry can specify a minimum time updating is allowed for it and dependent collector entries. 2. Polling frequency sliding: Additional to polling overrides a collector entry can specify 'sliding' polling frequency if the state remains the same. This means the frequency slows down reducing overhead of polling on a stagnant resource. 3. The monitor pack has an overriding frequency. If used...Family Tree Analyzer: Version 3.7.2.3-beta2: Small beta test to determine issue with Lost Cousins facts with census with no country.AST - a tool for exploring windows kernel: Ast-0.2.20140519-win8.1x86: symbol form, supports any symbol query like dt/x command in windbg symbol form, supports loading pdb file pe form, visualizer of pe info (dos/optional header, sections, directories, import/export table)Mini SQL Query: Mini SQL Query (1.0.72.457): Apologies for the previous update! FK issue fixed and also a template data cache issue.Endomondo Export: First Release: This is the first release, it might be buggy, so I'll eventually try to improve it over time. I did it quick and dirty as I didn't have much spare time to develop it, but again it works for me. ;-) If I see people use it and there are reasonable requests I might add more stuff to it. Hope you guys like it!FileTable Services for Lightswitch: FileTable Services for Lightswitch 1.0.0: 19 MAY 2014 v.1.0.0 Initial releaseWordMat: WordMat v. 1.06: Check WordMat.blogspot.com for a complete description of new features.Visual F# Tools: Daily Builds Preview 05-16-2014: This preview is released for use under a proprietary license.Wsus Package Publisher: Release v1.3.1405.17: Add Russian translation (thanks to VSharmanov) Fix a bug that make WPP to crash if the user click on "Connect/Reload" while the Report Tab is loading. Enhance the way WPP store the password for remote computers command.MoreTerra (Terraria World Viewer): More Terra 1.12.9: =========== = Compatibility = =========== Updated to account for new format 1.2.4.1 =========== = Issues = =========== all items have not been added. Some colors for new tiles may be off. I wanted to get this out so people have a usable program.LINQ to Twitter: LINQ to Twitter v3.0.3: Supports .NET 4.5x, Windows Phone 8.x, Windows 8.x, Windows Azure, Xamarin.Android, and Xamarin.iOS. New features include Status/Lookup, Mute APIs, and bug fixes. 100% Twitter API v1.1 coverage, Async, Portable Class Library (PCL).ConEmu - Windows console with tabs: ConEmu 140519 [Alpha]: ConEmu - developer build x86 and x64 versions. Written in C++, no additional packages required. Run "ConEmu.exe" or "ConEmu64.exe". Some useful information you may found: http://superuser.com/questions/tagged/conemu http://code.google.com/p/conemu-maximus5/wiki/ConEmuFAQ http://code.google.com/p/conemu-maximus5/wiki/TableOfContents If you want to use ConEmu in portable mode, just create empty "ConEmu.xml" file near to "ConEmu.exe" CS-Script for Notepad++ (C# intellisense and code execution): Release v1.0.26.0: Added access to the Release Notes during 'Check for Updates...'' Debug panels Added support for generic types members Members are grouped into 'Raw View' and 'Non-Public members' categories Implemented dedicated (array-like) view for Lists and Dictionaries http://download-codeplex.sec.s-msft.com/Download?ProjectName=csscriptnpp&DownloadId=846498ClosedXML - The easy way to OpenXML: ClosedXML 0.70.0: A lot of fixes. See history.SFDL.NET: SFDL.NET (2.2.9.2): Changelog: Neues Icon Xup.in CnL Plugin BugfixSEToolbox: SEToolbox 01.030.008 Release 1: Fixed cube editor failing to apply color to cubes. Added to cube editor, replace cube dialog, and Build Percent dialog. Corrected for hidden asteroid ore, allowing rare ore to show when importing an asteroid, or converting a 3d model to an asteroid (still appears to be limitations on rare ore in small asteroids). Allowed ore selection to Asteroid file import. (Can copy/import and convert existing asteroid to another ore). Added progress bars to common long running operations. Fixed ...Better Robocopy GUI: Command Line GUI for Robocopy: Better Robocopy GUI had become the primary plugin in Command Line GUI built on .NET 4TFS Planning and Disaster Recovery Avoidance Guide: v1.4.BETA - TFS, DR and Azure IaaS Planning Guides: Welcome to the TFS Planning and DR Avoidance Guidance What is new? A new crisper, more compact style, which is easier to consume on multiple devices without sacrificing any content. Also included are the new TFS on Azure IaaS guide and supplementary guides. Note Capacity planning workbook and posters are included in the Everything Zip package. Quality-Bar Detail Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review ...New ProjectsBizTalk Port Info Query Tool: This tool is capable of retrieving BizTalk send and receive port information, through which can be searched.C5_StyleCopped: The C5 project while an excellent set of collections suffers from being very non StyleCop compliant.Channel 9 RSS Reader (Universal / WinPhone 8): Channel 9 RSS Reader Code Share Sample- A simple RSS reader app for the Channel 9 RSS feed sharing code across 3 apps.CRM Web API Yelp Example: Sample Visual Studio 2013 project that provides an example of how you could use Web API and Microsoft Azure to integrate with Yelp.ERP Accounting System: ERP Accounting SystemEssIL: Essential classes written in CIL.FileTable Services for Lightswitch: Integrates SQL Server 2012 and later FileTable functionality with Lightswitch rapid application development tools. Works with ALL types of Lightswitch clients.freeasyDMS: A free and easy to use DMS for everyone. Without any cloud restrictions. All information about added Documents are stored lokaly at XML files.FreelancerCreateReport: Freelancer_CreateReportInstituto Superior de Ciencias Comerciales: esta es una pruebaMVC Blogger: Under TestingMVC Bootstrap Timepicker: ASP.NET MVC html helper for Bootstrap 3 time picker. This helper makes it easy to use a time picker with the bootstrap look 'n feel in your web site.NextGen: NextGen FrameworkPlato 2D Framework: Plato Windows Runtime App canvas oriented MVVM framework.Promotion Planner Pro: Trade Promotion Management and Analytic suitSharePoint Managed Metadata List Filter: This managed metadata list filter webpart provides the ability to filter multiple list view webparts that contain the same Managed metadata site column on the sSurfwave: A Windows Store (Windows Runtime) library that provides multi-touch tracking and normalized interpretation capabilities.Torrent Description Generator: A simple WPF application to generate a robust torrent description for movies in text or bbcode. Includes file info, thumbs, imdb/RT links and poster.Trang's Project: Qu?n lý thông tin khách hàng trong ho?t d?ng vay v?nWebSniffer: A bot written in C# to play a hangman game and intelligently make decisions about what to pick next.WorldBankBBS: BBS Package designed for use with ASCII, ANSI and PETSCII (Commodore) users. All resources are shared between differing clients. WPF Password Generator with Prism 5 and Moq (2014): This is a WPF reference implementation for developing an MVVM application that uses Prism (5) and Moq.????-????【??】????????: ??????????????,??????????????????,?????????????。?????????,????????????。 ?????-?????【??】?????????: ?????????????????,????,????,?????????.?????,?????!?????,?????????、??、??! ??????-??????【??】??????????: ????????????,???????,??????。??????????,????,????,?????,????????????。 ??????-??????【??】??????????: ???????????????、???????,?????????,???????????????。?????????????,???????。 ??????-??????【??】??????????: ?????????????????,???????????????????????????,????:????,????,????,?????。 ??????-??????【??】??????????: ????????????????,?????????????? ??。??????????、????、????、?????????? ???????。 ??????-??????【??】??????????: ??????????????????,???、???!???????,????????????????,????????????,???! ??????-??????【??】??????????: ???????????????,????,???????、???????????,???????????,????,?????,???????。 ??????-??????【??】??????????: ????????????????????????,?????????,??????????,????????,?????! ??????-??????【??】??????????: ?????????????,????????,??????????????,?????????,????,????,??????。 ??????-??????【??】??????????: ??????????????、?????????,?????????,????,????????,????????????????! ??????-??????【??】??????????: ?????????????:??????、????、????、????、????、??????、??????，???????! ??????-??????【??】??????????: ????????????????、?????,????????????????????,????,????,??????。 ??????-??????【??】??????????: ????????????????，???????、???????????，????????、????、????、??????、????????。 ??????-??????【??】??????????: ???????????????????????????,???????????????????????,???????。 ??????-??????【??】??????????: ???????????????、????、????、??????、????、???????,?????,?????????! ??????-??????【??】??????????: ??????????????????、????、??????、????????,????????????,???????????！ ??????-??????【??】??????????: ????????????????????,?????????????????????,?????,????,???????. ??????-??????【??】??????????: ???????????????、???????,?????????,???????????????,?????????????。 ??????-??????【??】??????????: ????????????、??、???????????,??????,????????,??????????????????...????。 ??????-??????【??】??????????: ????????????????，?????????/?,,???????????,??????????????! ??????-??????【??】??????????: ??????????,????????????????????????,???????????????,?????????????！ ??????-??????【??】??????????: ??????????,????????,?????,???,???????????,???????????,?????,??????！ ??????-??????【??】??????????: ???????????????????????????、??????????????,??????????????。 ??????-??????【??】??????????: ?????????????????"????,????"???,????????????????????????,??????????????。 ??????-??????【??】??????????: ?????????????????,????:????,????,????,??????,?????,???????????????! ??????-??????【??】??????????: ??????????????????????????,???????????,????????,?????????????????????。 ??????-??????【??】??????????: ???????????、????、????、??????、????、????????,????????、?????????,?????。 ??????-??????【??】??????????: ?????????????????,?????????????。????????????,???????,???????,?????,?????。 ??????-??????【??】??????????: ????????????????,?????????、??、??、????,??????????,?????????????！ ??????-??????【??】??????????: ???????????、????、????、??????????,???,?????,???????????????. ??????-??????【??】??????????: ??????????????????????,?????, ... ????????????,????,????,?????,???????。 ??????-??????【??】??????????: ????????????????????????、??????,????、?????、????， ?????????，?????????????！ ??????-??????【??】??????????: ????????,??????,?????????????????????,???????????????????????。 ??????-??????【??】??????????: ?????????????????????、????、????、??????、???????,??????、??????。 ??????-??????【??】??????????: ???????【.????.????.????.????.】??【??】:、??、??、??、??、??、??、??、??、??、??、?????。 ??????-??????【??】??????????: ??????????????????,????,??.??.??.??.??.??.??.???，????，???????! ??????-??????【??】??????????: ????????????????????、????????、????????、????????、???????,????????????。 ??????-??????【??】??????????: ????????????????????,?????,???????,???????????,??????! ??????-??????【??】??????????: ???????????、??????、????、?????、?????!????,????????????????!????。 ??????-??????【??】??????????: ??????,??,????????。 ... ??????????????????、??????????????????... ???????-???????【??】???????????: ???????????????????????????,???????????????,????????????????！ ???????-???????【??】???????????: ???????????????:????,????,????,???????,????????,??????:????????,?????! ???????-???????【??】???????????: ???????,?????????,?????????????。?????????????,?????????,???????。 ??????-??????【??】??????????: ????????????????,???????、???????????,????????,????,?????????,??????,??????! ??????-??????【??】??????????: ?????????????????,????????????,?????????????????,??????,????????! ??????-??????【??】??????????: ??????????????????,???????、????、????、??????、???????,??????,???????????。 ??????-??????【??】??????????: ?????????????,??,??,??,??? ?,??,,??,??,??,??,??,??,????????,??????！ ??????-??????【??】??????????: ????????????????????????????:???????,??????,????,????,????,?????！ ??????-??????【??】??????????: ???????????????????,????,????,????,???????,?????,?????.??????。 ??????-??????【??】??????????: ????????????????????,?????????????,???????????.????????????,????????????! ??????-??????【??】??????????: ??????????????????,??:??????,????,????,????,?????,??????????????. ??????-??????【??】??????????: ?????????????????,???????????????。?????????????,???????,?????????。 ??????-??????【??】??????????: ?????????????,????(??)????????，??????，????，???，????，???????! ??????-??????【??】??????????: ??????????????,?????????????,?????????????,??????,????,????,??????????！ ??????-??????【??】??????????: ????????????????,????????,????:???????,??????,????,????,?????,?????,??????! ??????-??????【??】??????????: ?????????????????????,????,????,??????????。???????????????,??,??,??????????,??????... ??????-??????【??】??????????: ?????????????????,??????????????、???????、???????、???????、?????！ ??????-??????【??】??????????: ???????????,?????????????? ??。????????、????、????、?????????? ???????。 ??????-??????【??】??????????: ????????????、?????、?????、?????、?????、????,???????????,?????,??????！ ??????-??????【??】??????????: ?????????????、?????、?????、????、?????,??????????。????????????????! ??????-??????【??】??????????: ??????????????????,????????????,?????、??、????,?????,??????！ ??????-??????【??】??????????: ?????????????????,???????????????。???????????,??????:????、????、???????！ ??????-??????【??】??????????: ??????????????,?????????????,????,?????????,?????????????,?????,?????! ??????-??????【??】??????????: ??????????????????,???????????,??????????????,??????????，??????????????！

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• 250 k 404 & 410 errors in Webmaster Tools. Bad backlinks?

  - by Natália

  Our webmaster tools account is showing 250.000 errors related with weird links from other sites. These URLs are comming mostly from non existent sites or are being generated directly by our website. Here some examples of these urls: oursite.com/&q=videos+caseros+sexo+pornos+gratis&sa=X&ei=R638T8eTO8WphAfF2vG8Bg&ved=0CCAQFjAC%2F%2Fpage%2F2%2Fpage%2F3%2Fpage%2F4%2Fpage%2F3%2Fpage%2F4%2Fpage%2F3%2Fpage%2F4%2Fpage%2F5%2Fpage%2F4/page/3 Our site is a popular spanish adult site, yet we don´t have keywords which are being mentioned in this url. Apparently this link comes from our site. Some more examples: oursite.com/&q=losmejoresvideosporno&sa=X&ei=U__8T-BnqK7RBdjmhYsH&ved=0CBUQFjAA%2F%2Fpage%2F2%2Fpage%2F3%2Fpage%2F2%2Fpage%2F3%2Fpage%2F2%2Fpage%2F3%2Fpage%2F4%2Fpage%2F3%2Fpage%2F2%2Fpage%2F3/page/4 Once again: not our queries, not out urls. oursite/tag/tetonas We think that it might be other site, which is having a policy of extremely bad SEO based on other sites branding and keywords usage: thirdsite/buscador/tetonas-oursite The question is: if other sites are generating these urls, how can we prevent this? Why the tag is being generated if no link was added to the other site? What should we do with these errors? 301? 410 gone? I have read all similar Q&A here but none of them seems to solve our problem. It is not likely to be a bad ad (Inspected them all). Maybe some all content which google decided to recrawl suddenly? Maybe third parties bad SEO policy? Maybe all of them? Any help will be higly appreciated,

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• Chainloading GRUB2 from BURG

  - by WindowsEscapist

  I have an old PC with Puppy Linux in addition to Ubuntu and Windows XP. THis creates a LOT of menu entries (all of which I would like to keep): Ubuntu 10.04 Ubuntu Recovery Mode Memtest x86 Memtest Serial Windows XP Pro Precise Puppy Linux Precise Puppy TORAM Puppy 4.3.1 Puppy 4.3.1 TORAM Plop Boot Manager (for booting to USB, PC doesn't have BIOS option). Now, in my fancy shiny laptop I've gotten really attached to BURG, and would like a setup where I have a Windows icon, an Ubuntu icon, and an arrow that chainloads GRUB2 so that I can boot from USB or run Puppy if need be (all these entries will obviously not fit into the BURG theme I use, Lightness). The problem is, GRUB2 can't install the the beginning of a partition like it used to be able to (I am reluctant to specify andything with --force at the end), at least, without warning that warn: This is a BAD idea!. So I'm kind of at a loss here. I can't see how the folding option would work, because all of those other options would have the same icon once I unfolded (Lightness is non-text-based). If I do embed GRUB using grub-install /dev/sdax --force, how do I chainload it with BURG? Is there another way?

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• Bounding volume hierarchy - linked nodes (linear model)

  - by teodron

  The scenario A chain of points: (Pi)i=0,N where Pi is linked to its direct neighbours (Pi-1 and Pi+1). The goal: perform efficient collision detection between any two, non-adjacent links: (PiPi+1) vs. (PjPj+1). The question: it's highly recommended in all works treating this subject of collision detection to use a broad phase and to implement it via a bounding volume hierarchy. For a chain made out of Pi nodes, it can look like this: I imagine the big blue sphere to contain all links, the green half of them, the reds a quarter and so on (the picture is not accurate, but it's there to help understand the question). What I do not understand is: How can such a hierarchy speed up computations between segments collision pairs if one has to update it for a deformable linear object such as a chain/wire/etc. each frame? More clearly, what is the actual principle of collision detection broad phases in this particular case/ how can it work when the actual computation of bounding spheres is in itself a time consuming task and has to be done (since the geometry changes) in each frame update? I think I am missing a key point - if we look at the picture where the chain is in a spiral pose, we see that most spheres are already contained within half of others or do intersect them.. it's odd if this is the way it should work.

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• Basics of Website development [closed]

  - by user975234

  I have read this post: What should every programmer know about web development? but I have some more questions... I will be developing a content related website very soon and I am confused about some technology stuff. I am thinking about developing the site using ruby on rails. So when I'll be buying hosting, do I need to ask for something special? Like for example, we need to specify what kind of hosting we need, windows or linux. So for ruby on rails do I need some extra facilities from the hosting provider? Is ruby on rails a good choice for a large content related website? This may be a bit stupid but how do I choose my backend, scripting languages etc? Thing is I am really new to website development. And the flow of making websites is not clear. Any links will be helpful. EDIT: I know this question has been voted as non constructive. But if any one still has some precise knowledge about how the flow of website development goes, please comment your views.. That will be helpful!

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• What do I need to know to design a language and write a interpreter for it?

  - by alFReD NSH

  I know this question has been asked and even there are thousands of books and articles about it. But the problem is that there are too many, and I don't know are they good enough, I have to design a language and write a interpreter for it. The base language is javascript (using nodejs) but it's ok if the compiler was written in another language that I can use from node. I had done a research about compiler compilers in JS, there is jison (Bison implementaion in JS), waxeye, peg.js. I decided to give jison a try, due to the popularity and its being used by coffee script, so it should be able to cover my language too. The grammar definition syntax is similar to bison. But when I tried read the bison manual it seemed very hard to understand for me. And I think it's because I don't know a lot of things about what I'm doing. Like I don't what is formal language theory. I am experienced in Javascript (I'm more talented in JS than most average programmers). And also know basic C and C++ (not much experience but can write a working code for basic things). I haven't had any formal education, so I may not be familiar with some software engineering and computer science principles. Though everyday I try to grasp a lot of articles and improve. So I'm asking if you know any good book or article that can help me. Please also write why the resource you're suggesting is good. --update-- The language I'm trying to create, is not really complicated. All it has is expressions (with or without units), comparisons and logical operators. There are no functions, loops, ... The goal is to create a language that non-programmers can easily learn. And to write customized validations and calculations.

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• Low graphic mode after switching to fglrx drivers

  - by MrKenkadze27

  I have another problem on my laptop after trying to fix another issue. So, because of this issue, I wanted to switch to fglrx to fix it and after restart, I got this screen: I went back to terminal and I got rid of this problem by "purge"-ing the fglrx driver and removing it, going back to problem number one. I tried lot of methods to fix this such as this ones but they ether switched back to open-source drivers or didn't helped at all. So would anyone like to help? maybe give some commends to try? My Laptop has 2 GPU, AMD Radeon HD 7650M and Intel(R) HD Graphics 4000. AMD is running always making my laptop too hot. Here's one of the Xorg.5.log file paste, I am sure it will be useful finding my problem. Thanks! Please make answer easy to understand as I am not an expert, this problem is keeping me from being one. Also the AMD driver which can be downloaded from their site doesn't install, it says non compatible graphics card but Ubuntu Software Updater sure installs it.

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• How do you motivate peers to become better developers?

  - by Brian Rasmussen

  In my experience there seems to be two kinds of developers (if we simplify matters a great deal of course). On the one hand we have the developers, who may do a perfectly acceptable job, but who do not really care about the computer science part of their craft. They usually know few languages / technologies and are happy to let things stay that way. For whatever reason, they don't try to improve their computer science skills unless this is required in their current position. On the other hand, we have the geeks or the pragmatic programmers if you subscribe to that idea. They play around with other languages and technologies and usually have knowledge about several topics outside the technical domain of their current job. I would like to see more developers, who are enthusiastic about software development. If you share this point of view, what do you do to push your peers in that direction? Edit: follow-up question inspired by one of the answers: As non-managers, should we really care about this? And why/why not?

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• Cannot install Ubuntu on an Acer Aspire One 756

  - by Byron807

  I have used Ubuntu before, in virtual machines, but today I decided to make the leap and I bought a netbook to install Ubuntu as a "real" OS alongside Windows. The netbook I bought is an Acer Aspire One 756, with a 64-bit Intel processor, 4GB RAM, and Windows 8 as the default OS. I have now encountered several obstacles that actually prevent me from installing Ubuntu 12.10. Here are all the things I have tried so far: Used a live CD, in combination with a USB DVD drive. (I should point out that the Aspire One does not have an optical drive.) The computer does not boot in Ubuntu; the drive keeps spinning, but nothing happens, even though I changed the boot order in the BIOS. Used a USB drive created via the tool available on pendrivelinux.com. Again, I've made changes to the BIOS to make sure the computer tries to boot from USB before using the built-in HDD. The results vary in this case: sometimes, the computer keeps rebooting like crazy until I remove the USB drive, at which point the computer boots into Windows 8, as expected. If I use a different USB drive, I get an error message that says that the USB drive has been blocked due to "the current security policy". Tried to install Ubuntu via Wubi. The program appears to install something, but at some point during the installation process, I get a non-specified error message and nothing else happens. I am not sure if these are known issues; in any case, searching the forum has not yielded any results, so I thought I should simply describe my problem here in the hope that this question has not been answered before. I would greatly appreciate any help with this annoying problem. Of course, if anything is unclear, do not hesitate to ask for further details.

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• Precision loss when transforming from cartesian to isometric

  - by Justin Skiles

  My goal is to display a tile map in isometric projection. This tile map has 25 tiles across and 25 tiles down. Each tile is 32x32. See below for how I'm accomplishing this. World Space World Space to Screen Space Rotation (45 degrees) Using a 2D rotation matrix, I use the following: double rotation = Math.PI / 4; double rotatedX = ((tileWorldX * Math.Cos(rotation)) - ((tileWorldY * Math.Sin(rotation))); double rotatedY = ((tileWorldX * Math.Sin(rotation)) + (tileWorldY * Math.Cos(rotation))); World Space to Screen Space Scale (Y-axis reduced by 50%) Here I simply scale down the Y value by a factor of 0.5. Problem And it works, kind of. There are some tiny 1px-2px gaps between some of the tiles when rendering. I think there's some precision loss somewhere, or I'm not understanding how to get these tiles to fit together perfectly. I'm not truncating or converting my values to non-decimal types until I absolutely have to (when I pass to the render method, which only takes integers). I'm not sure how to guarantee pixel perfect rendering precision when I'm rotating and scaling on a level of higher precision. Any advice? Do I need to supply for information?

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• NHibernate Tools: Visual NHibernate

  - by Ricardo Peres

  You probably know that I’m a big fan of Slyce Software’s Visual NHibernate. To me, it is the best tool for generating your entities and mappings from an existing database (it also allows you to go the other way, but I honestly have never used it that way). What I like most about it: Great support: folks at Slyce always listen to your suggestions, give you feedback in a timely manner, and I was even lucky enough to have some of my suggestions implemented! The templating engine, which is very powerful, and more user-friendly than, for example, MyGeneration’s; one of the included templates is Sharp Architecture; Advanced model validations: it even warns you about having lazy properties declared in non-lazy entities; Integration with NHibernate Validator and generation of validation rules automatically based on the database, or on user-defined model settings; The designer: they opted for not displaying all entities in a single screen, which I think was a good decision; has support for all inheritance strategies (table per class hierarchy, table per class, table per concrete class); Generation of FluentNHibernate mappings as well as hbm.xml. I could name others, but… why don’t you see for yourself? There is a demo version available for downloading. By the way, I am in no way related to Slyce, I just happen to like their software!

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• Rankings dropping after small URL-change WITH 301-redirect

  - by David

  Two weeks ago, we attempted to make the URLs of ca. 12 pages more search-engine friendly. We changed three things. 1. Make URLs more SEF from: /????-????/brandname.html (meaning: /aircon-price/daikin.html to: /????-brandnameinenglish-brandnameinthai.html We set up 301-redirects from the old to the new URLs. You can find an example and the link to our page here: http://bit.ly/XRoTOK There are no direct external links to the old URLs. 2. Added text to img-links from homepage to brand-pages Before those changes, we only linked to those brands with a picture, so we added some text under the picture. You can see that here, in the left submenu: http://bit.ly/XRpfoF 3. Minor changes to Title, h1-Tags, Meta Description, etc. Only minor changes, to better match the on-site optimization with targeted keywords. For example, before we used full brand names, after we used what was really searched for: from: Mitsubishi Electric Mr. Slim to: ???? Mitsubishi (means: Aircon Mitsubishi) Three days after these changes, we noticed a heavy drop (80% loss in non-paid search traffic) in rankings and traffic for those pages, and also for all pages which are sub-categorized. Rankings for all keywords not affected by the changes stayed the same. Any ideas, what happened, and how we can regain our old rankings? What we already did, was submitting a new sitemap. Help much appreciated. Best regards, David

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• What's the best way to learn/increase problem-solving skills?

  - by tucaz

  Hi all! I'm not sure this is the right place to ask this question, neither if this is the right way to ask this question but I hope you help me if it is not. I work as a programmer since I was 15 (will be 24 next week) so learning programming logic was somehow natural during the course of my career and I think that it helped me to get pretty good problem-solving. One thing none of us (programmers) can deny is that programming logic helps us in a lot of fields outside computer programming. So I'd say it is a very valuable resource that one should learn. My girlfriend is not a programmer and graduated in college on a non related course (Foreign Relations) because she didn't know what to study back then. As the years passed she discovered that she liked Logistics and started to work with it almost two years ago. However, since she does not have a technical background (not even basic Math) she is really having a hard time with it. She is already trying to catch up with Math, but even simple questions/brain-teasers are hard to her. For example, trying to find the missing numbers of this sequence: 0, 1, 1, 2, 3, 5, 8, _, _, 34 and so on. We know that this is Fibonacci but if we didn't we would probably be able to get to the correct answer just by "guessing" (using our acquired problem-solving skills). I'm not sure if problem-solving skills or logic are the correct name for it, but this is what I mean: quick solve problems, brain-teasers, find patterns, have a "sharp" mind. So, the question is: what is the best way for someone to learn this kind of skills without being a programmer (or studying algorithms and such)? If you say it is a book, could you please recommend one? Thanks a lot!

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• Modelling work-flow plus interaction with a database - quick and accessible options

  - by cjmUK

  I'm wanting to model a (proposed) manufacturing line, with specific emphasis on interaction with a traceability database. That is, various process engineers have already mapped the manufacturing process - I'm only interested in the various stations along the line that have to talk to the DB. The intended audience is a mixture of project managers, engineers and IT people - the purpose is to identify: points at which the line interacts with the DB (perhaps going so far as indicating the Store Procs called at each point, perhaps even which parameters are passed.) the communication source (PC/Handheld device/PLC) the communication medium (wireless/fibre/copper) control flow (if leak test fails, unit is diverted to repair station) Basically, the model will be used as a focus different groups on outstanding tasks; for example, I'm interested in the DB and any front-end app needed, process engineers need to be thinking about the workflow and liaising with the PLC suppliers, the other IT guys need to make sure we have the hardware and comms in place. Obviously I could just improvise in Visio, but I was wondering if there was a particular modelling technique that might particularly suit my needs or my audience. I'm thinking of a visual model with supporting documentation (as little as possible, as much as is necessary). Clearly, I don't want something that will take me ages to (effectively) learn, nor one that will alienate non-technical members of the project team. So far I've had brief looks at BPMN, EPC Diagrams, standard Flow Diagrams... and I've forgotten most of what I used to know about UML... And I'm not against picking and mixing... as long as it is quick, clear and effective. Conclusion: In the end, I opted for a quasi-workflow/dataflow diagram. I mapped out the parts of the manufacturing process that interact with the traceability DB, and indicated in a significantly-simplified form, the data flows and DB activity. Alongside which, I have a supporting document which outlines each process, the data being transacted for each process (a 'data dictionary' of sorts) and details of hardware and connectivity required. I can't decide whether is a product of genius or a crime against established software development practices, but I do think that is will hit the mark for this particular audience.

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