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  • HTG Explains: Why Do So Many Apps Want to Send Usage Statistics, and Should I Let Them?

    - by Chris Hoffman
    Many programs want to send usage statistics, error logs, and crash reports — data about how you use the application and what problems occurred — to their servers. Some people disable these options, but should you? We’ll look at the exact types of data applications want to send, what developers do with it, whether any sensitive personal data is being passed along, and the advantages and disadvantages to enabling these options.    

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  • Gone in 60 Seconds: An Insecure Database is an Easy Target

    - by Troy Kitch
    According to the recent Verizon Data Breach Investigations Report, 98% of breached data originates from database servers and nearly half are compromised in less than a minute! Almost all victims are not even aware of a breach until a third party notifies them and nearly all breaches could have been avoided through the use of basic controls. Join us for this November 28th webcast to learn more about the evolving threats to databases that have resulted in over 1 billion stolen records. Also, hear how organizations can mitigate risks by adopting a defense-in-depth strategy that focuses on basic controls to secure data at the source - the database. There's no turning back the clock on stolen data, but you can put in place controls to ensure your organization won't be the next headline. Note, this webcast will be recorded for on-demand access after November 28th. 

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  • Search multiple tables

    - by gilden
    I have developed a web application that is used mainly for archiving all sorts of textual material (documents, references to articles, books, magazines etc.). There can be any given number of archive tables in my system, each with its own schema. The schema can be changed by a moderator through the application (imagine something similar to a really dumbed down version of phpMyAdmin). Users can search for anything from all of the tables. By using FULLTEXT indexes together with substring searching (fields which do not support FULLTEXT indexing) the script inserts the results of a search to a single table and by ordering these results by the similarity measure I can fairly easily return the paginated results. However, this approach has a few problems: substring searching can only count exact results the 50% rule applies to all tables separately and thus, mysql may not return important matches or too naively discards common words. is quite expensive in terms of query numbers and execution time (not an issue right now as there's not a lot of data yet in the tables). normalized data is not even searched for (I have different tables for categories, languages and file attatchments). My planned solution Create a single table having columns similar to id, table_id, row_id, data Every time a new row is created/modified/deleted in any of the data tables this central table also gets updated with the data column containing a concatenation of all the fields in a row. I could then create a single index for Sphinx and use it for doing searches instead. Are there any more efficient solutions or best practises how to approach this? Thanks.

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  • Why OpenDialog.py don't work on Jotty application

    - by venerable13
    I'm a Python beginner, I installed quickly, I wrote a "quickly tutorial" in terminal and I did all the steps before at: "However, the application is not complete. There are a few things left for you to do:" All the next steps aren't finished yet because when I use open dialog and select one of the files saved, the content of the file isn't showed on "textview1", Why? Only is deleted the content written. Before if was used without dialog works great. SaveDialog.py work great. -def on_mnu_new_activate(self, widget, data=None) don't work neither. -If I use the bold lines by the others don't work. ###def open_file(self, widget, data=None): def on_mnu_open_activate(self, widget, data=None): ###def save_file(self, widget, data=None): def on_mnu_save_activate(self, widget, data=None): To view the code, go to the link above, unrar the archive, install "quickly" if you don't have it yet, place inside on jotty directory, then put "quickly run", "quickly edit", "quickly design", depending what do you want to do. Code - problematic code with OpenDialog implemented. Code-part1 - works OK, but without OpenDialog. I need principally that OpenDialog function work great.

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  • Solutions for iOS collaborative sync (iCloud CoreData, CouchDB)?

    - by mluisbrown
    I'm developing an iOS app where one of the features will be allowing users to share and collaborate on data (e.g. lists). From everything I've read and based on the way that iCloud CoreData sync works I assume that it would not be a good fit for the following reasons, but I wanted to make sure I wasn't missing anything, as I'd prefer not to use a 3rd party syncing solution if at all possible: iCloud sync of any kind (CoreData, Document or Key / Value pairs) can only ever be between devices that use the same iCloud account, so it's designed for a single user syncing data over multiple devices. Any kind of collaborative sync (several people editing the same document / list) simultaneously would be limited to everyone have the same iCloud account. Cases of people sharing the same iCloud account is usually limited to, for example, husband and wife or similar close relationships for a small number of people. iCloud Core Data sync is for ensuring that each sync'd device has the same data. It doesn't seem to allow syncing just a subset of the data, so scenarios in which each user has their own documents and is only sharing / collaborating on a subset of them are not supported. And I'm not even mentioning the well document problems with iCloud CoreData syncing which may or may not have been resolved with iOS 7. Given the above, it would seem that CouchDB (with TouchDB) would be a better option, as it seems to support everything I need. What other options are there that people can recommend?

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  • How can I tweak this A* search pathfinding algorithm to handle different terrain movement values?

    - by user422318
    I'm creating a 2D map-based action game with similar interaction design as Diablo II. In other words, the player clicks around a map to move their player. I just finished player movement and am moving on to pathfinding. In the game, enemies should charge the player's character. There are also five different terrain types that give different movement bonuses. I want the AI to take advantage of these terrain bonuses as they try to reach the player. I was told to check out the A* search algorithm (http://en.wikipedia.org/wiki/A*_search_algorithm). I'm doing this game in HTML5 and JavaScript, and found a version in JavaScript: http://www.briangrinstead.com/blog/astar-search-algorithm-in-javascript I'm trying to figure out how to tweak it though. Below are my ideas about what I need to change. What else do I need to worry about? When I create a graph, I will need to initialize the 2D array I pass in passed on with a traversal of a map that corresponds to the different terrain types. in graph.js: "GraphNodeType" definition needs to be modified to handle the 5 terrain types. There will be no walls. in astar.js: The g and h scoring will need to be modified. How should I do this? in astar.js: isWall() should probably be removed. My game doesn't have walls. in astar.js: I'm not sure what this is. I think it indicates a node that isn't valid to be processed. When would this happen, though? At a high level, how do I change this algorithm from "oh, is there a wall there?" to "will this terrain get me to the player faster than the terrain around me?" Because of time, I'm also debating reusing my Bresenham algorithm for the enemies. Unfortunately, the different terrain movement bonuses won't be used by the AI, which will make the game suck. :/ I'd really like to have this in for the prototype, but I'm not a developer by trade nor am I a computer scientist. :D If you know of any code that does what I'm looking for, please share! Sanity check tips for this are also appreciated.

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  • Bind to Collection Objects with Silverlight 3

    In this third part of the series we will continue to discuss Silverlight 3 data binding. This time however we ll cover more complex topics such as how to bind to collection objects. The fourth and fifth parts will cover how to deal with the validation during data binding not to mention the possible data conversion .... Test Drive the Next Wave of Productivity Find Microsoft Office 2010 and SharePoint 2010 trials, demos, videos, and more.

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  • What simple offline GUI database should I use for this application?

    - by gcc
    I am looking an open source application. Application should have : * database support ( create two or three table ) * GUI ( what I have created should be seen ) Example : Assume that I have created a table ; X_table : | A | B | C | D | After creating table, I am loading data | A | B | C | D | | 1 | 11 | b | f | - | 3 | 12 | a | o | - data | 4 | 13 | r | o | - When I am opening application not for loading data, I want see data in graphical interface. Are there any open source application which have above feature ? Application can be so simple, * no internet connection * support only one database * static table creation ( once created never changed ) Application can be run Ubuntu 12.04 and/or Windows. In other words, I am wanting database viewer and editor. EDIT: I should load pdf file, image etc. or give path of the file to the application. This link can be reference to my question . ( Interface should be like this, just a list )

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  • How do you interpret `strace` on an apache process returning `restart_syscall`?

    - by indiehacker
    We restart an apache server every day because RAM usage reaches its limit. Though of value See this serverfault answer, I dont think lowering the MaxClients in the apache configuration is a solution to the unknown root problem. Can you make sense out of the below data? Below is an extract of what $top with M returns: 20839 www-data 20 0 1008m 359m 22m S 4 4.8 1:52.61 apache2 20844 www-data 20 0 1008m 358m 22m S 1 4.8 1:51.85 apache2 20842 www-data 20 0 1008m 356m 22m S 1 4.8 1:54.60 apache2 20845 www-data 20 0 944m 353m 22m S 0 4.7 1:51.80 apache2 and then investigating a single process with $sudo strace -p 20839 returns only this one line, which is cryptic, for me: restart_syscall(<... resuming interrupted call ...> <unfinished ...> Any insights? Thanks.

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  • Virtual Technology Summit Series

    - by CassandraClark-OTN
    The Oracle Technology Network (OTN) is excited to invite you to our first Virtual Technology Summit Series.   Learn first hand from Oracle ACEs, Java Champions, and Oracle product experts, as they share their insight and expertise on using Oracle technologies to meet today’s IT challenges. We are offering three chances to watch and interact with Oracle and community experts.  Register Now by clicking one of the links below! Americas - Wednesday July 9th - 9am to 1pm PT / 12pm to 4pm  ET / 1 to 5 pm BRT EMEA – Thursday July 10th / 9am to 1pm BST / 10am – 2pm CET / 12pm to 4pm MSK / GST APAC English – July 16th / IST – 10:00am / SG – 12:30pm / AEST – 2:30pm ??These interactive, online events offer four technical tracks, each with a unique focus on specific tools, technologies, and tips in these focus areas: Java - Big Trends and Technologies - Java lets you mine Big Data, build robust apps with HTML5, JavaScript and Java EE, and expand into the Internet of Things. Experts will present and you’ll be able to chat with them live online. Don’t miss out on this great opportunity to learn from some of the best minds in the Java community. Systems – OS Tips and Tricks for Sysadmins – Learn first hand how to configure Oracle Linux to run Oracle Database 11g and 12c, how to use the latest networking capabilities in Oracle Solaris 11, and how to troubleshoot networking problems in Unix and Linux systems. Database - Mastering Oracle Database Management & Development Techniques – Oracle ACEs and product team experts will present advanced features and management methods that will help you master your Oracle Database capabilities and drive greater performance, agility and manageability of your IT implementation. This track will build upon your skills with data management, migration, and performance. Middleware - The Architecture of Analytics: Big Time Big Data and Business Intelligence – This track will present a solution architect’s perspective on how business intelligence products in Oracle’s Fusion Middleware family and beyond fit into an effective big data architecture, and present insight and expertise from Oracle ACEs specializing in business Intelligence to help you meet your big data business intelligence challenges.

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  • What&rsquo;s Wrong With This Code (#25)

    The goal: create an extension method that will make it easy to create FormCollection objects. The method is a helper for unit testing ASP.NET MVC code. public static FormCollection ToFormCollection(this object data) { var namesAndValues = data.GetType() .GetProperties() .WhereValueIsNotDefaultValue(data) .ToNameValueCollection(data); return new FormCollection(namesAndValues); } The extension method itself relies on a couple private extension...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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  • Outbound Traffic Logging on ASA 5520 possible?

    - by j2k4j
    Taking a look at the ASDM (6.4) for my ASA 5520, I get a nice summary of the traffic status, with items like "interface traffic usage", and "connections per second". This works well, but only shows the data for the last 5-6 minutes or so. Recently, I've been asked whether it's possible to pull up this same type of traffic data for a particular time in the past. (Such as: Find the traffic usage for a 3 minute period from date xx:xx:xx @ time xx:xx:xx) I've noticed that my ASA 5520 is logging the warning, errors, etc that it is processing. But traffic data is not logged (yet) according to my search through the ASA. Is logging the traffic data amounts (as wondered above) actually a possibility? Is there any way to find out the past data for traffic and such values? Thanks!

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  • How is this "interface"-like structure/pattern called?

    - by Sebastian Negraszus
    Let's assume we have an XmlDoc class that contains basic functionality for dealing with an XML data structure and saving/loading data to/from a file. Now we have several subclasses, A, B and C. They all inherit from XmlDoc and add component-specific methods for setting and getting lots of data. They are like "interfaces" but also add an implementation for the signatures. Finally, we have an ABCDoc class that joins all the "interfaces" via virtual multiple inheritence and adds some ABCDoc-specific stuff, such as using XMLDoc-methods to set an appropriate doc type. We may also have an ADoc class for only saving A data. How is this pattern called? "Interface" is not really the right word since interfaces usually do not contain an implementation. Bonus points for C++ code conventions.

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  • How to morph from a programmer noob to a guru?

    - by didxga
    I have been a programmer for two years, and i am getting hard to level up my skill especially working at legacy code maintenance right now. I think working hard is not enough to elevate my skill, because there are ton of opensource around us, the preoject i have been involved are all mixture of opensources --- from front end to back end from presentation tier to business logic tier. My work is just gluing all these together or something fewer complex which is to collect data from UI to logic module then retrieve the data processed and put it to UI. Sometime there is a need to add some simple logic(like assembling the data to a form that fit business logic interface) while transport data. Could you please give me any suggestion what should i do on the side to improve my skill? Thanks!

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  • Approach to Authenticate Clients to TCP Server

    - by dab
    I'm writing a Server/Client application where clients will connect to the server. What I want to do, is make sure that the client connecting to the server is actually using my protocol and I can "trust" the data being sent from the client to the server. What I thought about doing is creating a sort of hash on the client's machine that follows a particular algorithm. What I did in a previous version was took their IP address, the client version, and a few other attributes of the client and sent it as a calculated hash to the server, who then took their IP, and the version of the protocol the client claimed to be using, and calculated that number to see if they matched. This works ok until you get clients that connect from within a router environment where their internal IP is different from their external IP. My fix for this was to pass the client's internal IP used to calculate this hash with the authentication protocol. My fear is this approach is not secure enough. Since I'm passing the data used to create the "auth hash". Here's an example of what I'm talking about: Client IP: 192.168.1.10, Version: 2.4.5.2 hash = 2*4*5*1 * (1+9+2) * (1+6+8) * (1) * (1+0) Client Connects to Server client sends: auth hash ip version Server calculates that info, and accepts or denies the hash. Before I go and come up with another algorithm to prove a client can provide data a server (or use this existing algorithm), I was wondering if there are any existing, proven, and secure systems out there for generating a hash that both sides can generate with general knowledge. The server won't know about the client until the very first connection is established. The protocol's intent is to manage a network of clients who will be contributing data to the server periodically. New clients will be added simply by connecting the client to the server and "registering" with the server. So a client connects to the server for the first time, and registers their info (mac address or some other kind of unique computer identifier), then when they connect again, the server will recognize that client as a previous person and associate them with their data in the database.

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  • Returning a flexible datatype from a C++ function

    - by GavinH
    I'm developing for a legacy C++ application which uses ODBC for it's data access. Coming from a C# background, I really miss the ADO style of data access. I'm writing a wrapper (because we can't actually use ADO) to make our data access less painful. This means no char arrays, no manual text blob streaming, and no declaritive column binding. I'm struggling with how to store / return data values. In C# at least, you can declare an object and cast it to whatever (as long as the type is convertable). My current C++ solution is to use boost::any to store the data value in a custom DataColumnValue object. This class has conversion and assignment operators to the various types used in our app (more than 10). There's a bit of complexity here because if you store an int in the boost::any and try to boost::any_cast<long> you get a boost::bad_any_cast. Client objects shouldn't have to know how the value is stored internally. Does anyone have any experience trying to store / return values whose types are only known at runtime? Is there a better / cleaner way?

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  • C++ strongly typed typedef

    - by Kian
    I've been trying to think of a way of declaring strongly typed typedefs, to catch a certain class of bugs in the compilation stage. It's often the case that I'll typedef an int into several types of ids, or a vector to position or velocity: typedef int EntityID; typedef int ModelID; typedef Vector3 Position; typedef Vector3 Velocity; This can make the intent of code more clear, but after a long night of coding one might make silly mistakes like comparing different kinds of ids, or adding a position to a velocity perhaps. EntityID eID; ModelID mID; if ( eID == mID ) // <- Compiler sees nothing wrong { /*bug*/ } Position p; Velocity v; Position newP = p + v; // bug, meant p + v*s but compiler sees nothing wrong Unfortunately, suggestions I've found for strongly typed typedefs include using boost, which at least for me isn't a possibility (I do have c++11 at least). So after a bit of thinking, I came upon this idea, and wanted to run it by someone. First, you declare the base type as a template. The template parameter isn't used for anything in the definition, however: template < typename T > class IDType { unsigned int m_id; public: IDType( unsigned int const& i_id ): m_id {i_id} {}; friend bool operator==<T>( IDType<T> const& i_lhs, IDType<T> const& i_rhs ); }; Friend functions actually need to be forward declared before the class definition, which requires a forward declaration of the template class. We then define all the members for the base type, just remembering that it's a template class. Finally, when we want to use it, we typedef it as: class EntityT; typedef IDType<EntityT> EntityID; class ModelT; typedef IDType<ModelT> ModelID; The types are now entirely separate. Functions that take an EntityID will throw a compiler error if you try to feed them a ModelID instead, for example. Aside from having to declare the base types as templates, with the issues that entails, it's also fairly compact. I was hoping anyone had comments or critiques about this idea? One issue that came to mind while writing this, in the case of positions and velocities for example, would be that I can't convert between types as freely as before. Where before multiplying a vector by a scalar would give another vector, so I could do: typedef float Time; typedef Vector3 Position; typedef Vector3 Velocity; Time t = 1.0f; Position p = { 0.0f }; Velocity v = { 1.0f, 0.0f, 0.0f }; Position newP = p + v*t; With my strongly typed typedef I'd have to tell the compiler that multypling a Velocity by a Time results in a Position. class TimeT; typedef Float<TimeT> Time; class PositionT; typedef Vector3<PositionT> Position; class VelocityT; typedef Vector3<VelocityT> Velocity; Time t = 1.0f; Position p = { 0.0f }; Velocity v = { 1.0f, 0.0f, 0.0f }; Position newP = p + v*t; // Compiler error To solve this, I think I'd have to specialize every conversion explicitly, which can be kind of a bother. On the other hand, this limitation can help prevent other kinds of errors (say, multiplying a Velocity by a Distance, perhaps, which wouldn't make sense in this domain). So I'm torn, and wondering if people have any opinions on my original issue, or my approach to solving it.

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  • Windows Phone 7 Isolated Storage Explorer

    - by help.net
    WP7 Isolated Storage Explorer is a tool designed to help developers and testers interact with the isolated storage file for Silverlight Windows Phone 7 applications. The explorer can work both as a desktop application for testers or integrated in Visual Studio for developers. Whenever a WP7 application/project involves storing data locally the the device, it will be to the isolated storage file. A common difficulty is accessing the data for testing or rapidly restoring the application's data/state...(read more)

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  • Bluetooth push application

    - by Paul Kassey
    I am considering the technical viability of software that I want to write. Is there a way that I can push data to a phone (iPhone or Andriod) via Bluetooth without pairing with it? I want to be able to walk into a room and have a computer push data to my phone when I get a certain distance from it, or push data to any phone automatically when it comes within a certain distance to a Bluetooth-ready device?

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  • How do I restore a SQL Server database from last night's full backup and the active transaction log file?

    - by Dylan Beattie
    I have been told that it's good practise to keep your SQL Server data files and log files on physically separate disks, because it'll allow you to recover your data to the point of failure if the data drive fails. So... let's say that mydata.mdf is on drive D:, and my mydata_log.ldf is on drive E:, and it's 16:45, and drive D: has just died horribly. So - I have last night's full backup (mydata.bak). I have hourly transaction-log backups that will bring the data back up to 16:00... but that means I'll lose 45 minutes worth of updates. I still have mydata_log.ldf on the E: drive, which should contain EVERY transaction that was committed right up to the point where the drive failed. How do I go about recreating the database and restoring data from the backup file and the live transaction log, so I don't lose any updates? Is this possible?

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