Search Results

Search found 2584 results on 104 pages for 'purchase advise'.

Page 86/104 | < Previous Page | 82 83 84 85 86 87 88 89 90 91 92 93  | Next Page >

  • What do you need to know to be a world-class master software developer? [closed]

    - by glitch
    I wanted to bring up this question to you folks and see what you think, hopefully advise me on the matter: let's say you had 30 years of learning and practicing software development in front of you, how would you dedicate your time so that you'd get the biggest bang for your buck. What would you both learn and work on to be a world-class software developer that would make a large impact on the industry and leave behind a legacy? I think that most great developers end up being both broad generalists and specialists in one-two areas of interest. I'm thinking Bill Joy, John Carmack, Linus Torvalds, K&R and so on. I'm thinking that perhaps one approach would be to break things down by categories and establish a base minimum of "software development" greatness. I'm thinking: Operating Systems: completely internalize the core concepts of OS, perhaps gain a lot of familiarity with an OSS one such as Linux. Anything from memory management to device drivers has to be complete second nature. Programming Languages: this is one of those topics that imho has to be fully grokked even if it might take many years. I don't think there's quite anything like going through the process of developing your own compiler, understanding language design trade-offs and so on. Programming Language Pragmatics is one of my favorite books actually, I think you want to have that internalized back to back, and that's just the start. You could go significantly deeper, but I think it's time well spent, because it's such a crucial building block. As a subset of that, you want to really understand the different programming paradigms out there. Imperative, declarative, logic, functional and so on. Anything from assembly to LISP should be at the very least comfortable to write in. Contexts: I believe one should have experience working in different contexts to truly be able to appreciate the trade-offs that are being made every day. Embedded, web development, mobile development, UX development, distributed, cloud computing and so on. Hardware: I'm somewhat conflicted about this one. I think you want some understanding of computer architecture at a low level, but I feel like the concepts that will truly matter will be slightly higher level, such as CPU caching / memory hierarchy, ILP, and so on. Networking: we live in a completely network-dependent era. Having a good understanding of the OSI model, knowing how the Web works, how HTTP works and so on is pretty much a pre-requisite these days. Distributed systems: once again, everything's distributed these days, it's getting progressively harder to ignore this reality. Slightly related, perhaps add solid understanding of how browsers work to that, since the world seems to be moving so much to interfacing with everything through a browser. Tools: Have a really broad toolset that you're familiar with, one that continuously expands throughout the years. Communication: I think being a great writer, effective communicator and a phenomenal team player is pretty much a prerequisite for a lot of a software developer's greatness. It can't be overstated. Software engineering: understanding the process of building software, team dynamics, the requirements of the business-side, all the pitfalls. You want to deeply understand where what you're writing fits from the market perspective. The better you understand all of this, the more of your work will actually see the daylight. This is really just a starting list, I'm confident that there's a ton of other material that you need to master. As I mentioned, you most likely end up specializing in a bunch of these areas as you go along, but I was trying to come up with a baseline. Any thoughts, suggestions and words of wisdom from the grizzled veterans out there who would like to share their thoughts and experiences with this? I'd really love to know what you think!

    Read the article

  • How to introduce a computer illiterate 50-year old to programming [closed]

    - by sunday
    The other day my dad asked me a question that I would have never expected from him. "How can I learn C++?" My dad is turning 56 this year and computers are a distant concept for him. He doesn't know how to use a phone very well besides calling numbers (no speed dial or contacts); though he has started to learn computers a little better - to the point that he knows how to open the internet (in Windows) and browse around (and has successfully completed several job applications entirely on his own online, of which he was offered positions too). But still, these are too narrow-windowed experiences to mean much, really. While he may not have the background, my dad knows how to read. And I mean reading as a skill, not just an ability. He has little to no college education (financial problems, family, etc.) and was fortunate enough to finish high school, but still taught himself to become a master electrician and has been one for almost 30 years now. He did the same with guitar, learning to play at a very professional level and has been praised for his skill. In high school, he picked up a weight lifting book - and was the only person in his high school at the time to qualify officially as an "athlete" by national standards. In all cases, he just needed something to read. Something to teach him. He absorbs information like a sponge. I have no doubt in my dad's motivation or capability of doing this, so my general goal is simply: Get my dad into the world of computers, and get him on the road to programming. I strongly believe that once I get him through the fundamentals, his drive and reading skill will keep him going on this own. So I'm asking you all: where should I start with all this? And what are the best resources out there? Should I get him to start Linux instead of Windows? Is C++ a bad idea? Remember, he needs to (IMO) learn computers first, and then get that first grasp (the "Hello world" experience) of programming. For money's sake and at top preference, I'd like free online resources that he can read, but by all means any good suggestions in print or paid-for-online are welcome (that I could possibly look into later to purchase). And also, I intend to start him off with C++ (no Python, Java, etc.), because I know it the best and will be able to help him along the way with code. (I have minimal knowledge right now in other languages). Edit: I'm getting a lot of persistent suggestions to use Python. The only reason I wanted to do C++ is that I KNOW it and can be THERE when my dad needs help. My VERY FIRST exposure to programming ever was Java. I learned Java, and I got good at it. I open to other suggestions, but please provide an effective application of your suggestions. EDIT #2: I understand my approach/thinking/knowledge could be lacking here. I'm a sophomore level undergraduate CS major. If you don't agree with anything in my post, tell me why - give me ideas, information - that's why I'm asking in the first place. To narrow down my general goal to specific reachable goals.

    Read the article

  • Java and AppStore receipt verification

    - by user1672461
    I am trying to verify a payment receipt on server side. I am getting a {"status":21002, "exception":"java.lang.IllegalArgumentException"} in return Here is the code: private final static String _sandboxUriStr = "https://sandbox.itunes.apple.com/verifyReceipt"; public static void processPayment(final String receipt) throws SystemException { final BASE64Encoder encoder = new BASE64Encoder(); final String receiptData = encoder.encode(receipt.getBytes()); final String jsonData = "{\"receipt-data\" : \"" + receiptData + "\"}"; System.out.println(receipt); System.out.println(jsonData); try { final URL url = new URL(_productionUriStr); final HttpURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setDoOutput(true); final OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream()); wr.write(jsonData); wr.flush(); // Get the response final BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while ((line = rd.readLine()) != null) { System.out.println(line); } wr.close(); rd.close(); } catch (IOException e) { throw new SystemException("Error when trying to send request to '%s', %s", _sandboxUriStr, e.getMessage()); } } My receipt looks like this: {\n\t"signature" = "[exactly_1320_characters]";\n\t"purchase-info" = "[exactly_868_characters]";\n\t"environment" = "Sandbox";\n\t"pod" = "100";\n\t"signing-status" = "0";\n} Receipt data with a BASE64 encoded receipt looks like this: Blockquote {"receipt-data" : "[Block_of_chars_76x40+44=3084_chars_total]"} Does someone have an Idea, or sample code how can I get from receipt string to reply JSON, mentioned here: [http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/StoreKitGuide/VerifyingStoreReceipts/VerifyingStoreReceipts.html#//apple_ref/doc/uid/TP40008267-CH104-SW1]? Thank you

    Read the article

  • Subsonic : Can’t decide which property to consider the Key? foreign key issue.

    - by AJ
    Hi I am trying to select count of rows from a table which has foreign keys of two tables. The C# code threw the error mentioned below. So, I added a primary key column to the table (schema as follows) and regenerated the code. But still the same error is coming. Error : Can't decide which property to consider the Key - you can create one called 'ID' or mark one with SubSonicPrimaryKey attribute sqLite Table schema CREATE TABLE "AlbumDocuments" ("Id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "AlbumId" INTEGER NOT NULL CONSTRAINT fk_AlbumId REFERENCES Albums(Id) , "DocumentId" INTEGER NOT NULL CONSTRAINT fk_DocumentId REFERENCES Documents(Id)) C# code int selectAlbumDocumentsCount = new SubSonic.Query.Select() .From<DocSafeDB.DataLayer.AlbumDocumentsTable>() .Where(DocSafeDB.DataLayer.AlbumDocumentsTable.AlbumIdColumn).In(request.AlbumId) .Execute(); Not sure what I should be doing next as I can't do where against primary key because I don;t have that info. So my questions are: How do I select count of rows against foreign key column? Is primary key required in this scenario? I have several things but not sure why its not working. To me it looks like a very normal use case. Please advise. Thanks AJ

    Read the article

  • TreeGrid in GXT

    - by aTory
    Problem I'm trying to create an asynchronously updating TreeGrid in GXT but encountering issues. The first issue is that I believe the documentation is 'piss poor', at best.. therefore any chance of learning without using 'word of mouth' seems ridiculous. Instead of moaning any further, I shall inform you what I'd LIKE to do and then hopefully you can tell me if what i want is possible. Example knowledge of Football is recommended here I have a few Async services where: getLeagues() getTeams(League) getPlayers(League,Team) getPosition(League,Team,Player) I'd like to have a grid where once it renders, it makes a call to 'getLeagues', where by the server will respond with a bunch of leagues that are currently active on the server... these will be the 'root node' of the TreeGrid. Then, from here you can expand each league to show the teams, right down to the players and then their positions. I'd like to Create a TreeGrid which has a 'listener' on each node, waiting to asynchronously call the server on request and propogate the tree from here, however I'm not sure if this is possible. Can anybody advise? I'm finding all these Models, BaseTreeModels, TreeStores nauseating.

    Read the article

  • jQuery hiding a div on click outside

    - by Lee
    Hi All I would like to build a simple menu for each list element clicked on but hide this div once you click outside it. Here is some simple code which hopefully will make sense. $('.drillFolder').click(function(){ var id = $(this).attr('data-folder'); $(".drillDownFolder ul li > a").attr('data-id', id); $(".drillDownFolder").show(); }); $("body").click(function(e){ if(e.target.className !== "drillDownFolder") { $(".drillDownFolder").hide(); } }); //The hidden div <div class="drillDownFolder" style="display:none"> <ul> <li><a href="#" data-id="">Show Image</a></li> <li><a href="#" data-id="">Edit Image</a></li> </ul> </div> I know whats wrong as the menu is show via the .drillFolder links the body click is then hiding it straight away. How can I avoid this. Thank you if you can advise

    Read the article

  • hibernate validationQuery.. proper way to use it

    - by cometta
    sometime the connection from application to database will drop and i get SQLState: 08006 error Code: 17002. Below is my configuration for database pooling <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.use_sql_comments">true</prop> <prop key="hibernate.cglib.use_reflection_optimizer">true</prop> <!-- true ==start up slower, but performacen on runtime good--> <prop key="hibernate.hbm2ddl.auto">update</prop> <prop key="hibernate.c3p0.min_size">5</prop> <prop key="hibernate.c3p0.max_size">20</prop> <prop key="hibernate.c3p0.timeout">1800</prop> <prop key="hibernate.c3p0.max_statements">100</prop> <!-- c3p0's PreparedStatement cache. Zero means statement caching is turned off. --> Can anyone advise, should i use validationQuery, onBorrow.. and why need to use it? what other properties should i use to enhance stability of the connection from my application to oracle10g?

    Read the article

  • Question about using ServiceModelEx's "WCFLogbook" from "Programming WCF Services" book

    - by Bill
    I am attempting to compile/run a sample WCF application from Juval Lowy's website (author of Programming WCF Services & founder of IDesign). Of course the example application utilizes Juval's ServiceModelEx library and logs faults/errors to a "WCFLogbook" database. Unfortunately, when the sample app faults, I get the following new error: "Cannot open database "WCFLogbook" requested by the login. The login failed. Login failed for user 'Bill-PC\Bill'." I suspect the error occurs as a result of not finding the "WCFLogbook" database, which I believe still needs to be created. Included in the library source directory, there are two files -WCFLogbookDataSet.xsd and WCFLogbook.sql; which neither seem to be referenced anywhere within the library code. This leads me to beleive that the sql and xsd files are there to be used to create the database somehow in SQL. Could someone please advise me if I am going in the correct direction here and if whether these files can be used to create the database (and if so, how)?

    Read the article

  • Thread-safe data structures

    - by Inso Reiges
    Hello, I have to design a data structure that is to be used in a multi-threaded environment. The basic API is simple: insert element, remove element, retrieve element, check that element exists. The structure's implementation uses implicit locking to guarantee the atomicity of a single API call. After i implemented this it became apparent, that what i really need is atomicity across several API calls. For example if a caller needs to check the existence of an element before trying to insert it he can't do that atomically even if each single API call is atomic: if(!data_structure.exists(element)) { data_structure.insert(element); } The example is somewhat awkward, but the basic point is that we can't trust the result of exists call anymore after we return from atomic context (the generated assembly clearly shows a minor chance of context switch between the two calls). What i currently have in mind to solve this is exposing the lock through the data structure's public API. This way clients will have to explicitly lock things, but at least they won't have to create their own locks. Is there a better commonly-known solution to these kinds of problems? And as long as we're at it, can you advise some good literature on thread-safe design? Thank you.

    Read the article

  • IndexOutOfBoundsException when updating a contact in contact list - Blackberry

    - by Taha
    Software and Simulator version i am using Blackberry Smartphone simulator: 2.13.0.65 Blackberry software version 5.0.0_5.0.0.14 I am looking at modifying contacts. Below is the code snippet i am using. I am getting a IndexOutOfBounds Exception at line String wtel = blackBerryContact.getString(BlackBerryContact.TEL, supportedAttributes[i]); Can someone advise what is going wrong here. Following is the code snippet ..... // Load the addressbook and let the user choose from list of contact BlackBerryContactList contactList = (BlackBerryContactList) PIM.getInstance().openPIMList(PIM.CONTACT_LIST,PIM.READ_WRITE); PIMItem pimItem = contactList.choose(); BlackBerryContact blackBerryContact = (BlackBerryContact)pimItem; PIMList pimList = blackBerryContact.getPIMList(); // get the supported attributes for Contact.TEL int[] supportedAttributes = pimList.getSupportedAttributes(Contact.TEL); Dialog.alert("Supported Attributes "+supportedAttributes.length); // gives me 8 for (int i=0; i < supportedAttributes.length;i++){ if(blackBerryContact.ATTR_WORK == supportedAttributes[i]){ Dialog.alert("updating Work"); // This alert is shown Dialog.alert("is supported "+ pimList.isSupportedAttribute(BlackBerryContact.TEL, supportedAttributes[i])+" "+pimList.getAttributeLabel(supportedAttributes[i])); // shows true and work String wtel = blackBerryContact.getString(BlackBerryContact.TEL, supportedAttributes[i]); // I get a IndexOutOfBounds Exception here if(wtel != ""){ pimItem.removeValue(BlackBerryContact.TEL, supportedAttributes[i]); } pimItem.addString( Contact.TEL, BlackBerryContact.ATTR_WORK, number); // passing the number that has to be updated if(pimItem.isModified()) { pimItem.commit(); Dialog.alert("Updated Work Number"); } } } ..... I want to update all the supported attributes for Contact.TEL field http://www.blackberry.com/developers/docs/5.0.0api/net/rim/blackberry/api/pdap/BlackBerryContact.html Field Values Per Field Supported Attributes ----------------------------------------------------------------------------- Contact.TEL 8 Contact.ATTR_WORK, Contact.ATTR_HOME, Contact.ATTR_MOBILE, Contact.ATTR_PAGER, Contact.ATTR_FAX, Contact.ATTR_OTHER, Contact.ATTR_HOME2, Contact.ATTR_WORK2

    Read the article

  • want to add url links to .csv datafeed using python

    - by abs
    Hi all ive looked through the current related questions but have not managed to find anything similar to my needs. Im in the process of creating a affiliate store using zencart - now one of the issues is that zencart is not designed for redirects and affiliate stores but it can be done. I will be changing the store so it acts like a showcase store showing prices. There is a mod called easy populate which allows me to upload datafeeds. This is all well and good however my affiliate link will not be in each product. I can do it manually after uploading the data feed and going to each product and then adding it as an image with a redirect link - However when there are over 500 items its going to be a long repetitive and time consuming job. I have been told that I can add the links to the data feed before uploading it to zencart and this should be done using python. Ive been reading about python for several days now and feel im looking for the wrong things. I was wondering if someone could please advise the simplest way for me to get this done. I hope the question makes sense thanks abs

    Read the article

  • Drupal vs ExpressionEngine for any kind of project from simple commercial site to complex ecommerce

    - by artmania
    Hi friends... So far I've been using custom cms. lately I developed own cms with CodeIgniter, and I'm actually happy. But recently I take more design and front-end development works than deep development projects. I actually also prefer so... I have many things to do with custom cms, also some security issues, etc. I'm kind of tired of doing everyhing custom, also I want to give more time to my family... Recently I'm seriously considering to go for a ready cms, and develop custom plugins when project need sth specific. This cms should be very flexible to implement any layout. also secured (since i had some hack problems with my custom cms!) I googled so much about this. As a result 2 options: Drupal Expression Engine opensource or licensed matter is not an issue for me at all. I just consider to go for a cms that I can use for any kind of project from simple 4-5 pages company sites to complicated projects like hotels directory, ecommerce portals, etc... As I found out; EE is more userfriendly and doesnt hassle about implementing custom layout as much as Drupal does. Also EE use CodeIgniter that I'm familiar. on the other hand I found out that Drupal is 10000% flexible, we can do anything with that (requires good php knowledge), extremely powerful and has many plugins... So I can't decide!! I want to go for a cms that I will use for looooong years from now on with no problems to implement any kind of project. So which one do you recommend? Appreciate your helps! thanks a lot... Edited: http://expressionengine.com/ee2_sneak_preview/#cost this Commercial License $299.95 is for 1 setup? So I need to purchase new licence for each project? Nothing like I pay once, and use the cms for as many project as I want?

    Read the article

  • configuring local W3C validator on xampp - windows xp sp3

    - by Gabriel
    Hi I have no experience on perl. I am trying to configure the W3C validator on my localhost (win32). I have already followed all the instructions given by W3C @http://validator.w3.org/docs/install_win.html, but I am getting the following error: Can't locate loadable object for module Encode::HanExtra in @INC (@INC contains: C:/xampp/perl/lib C:/xampp/perl/site/lib .) at C:/xampp/validator-0.8.6/httpd/cgi-bin/check line 49 Compilation failed in require at C:/xampp/validator-0.8.6/httpd/cgi-bin/check line 49. BEGIN failed--compilation aborted at C:/xampp/validator-0.8.6/httpd/cgi-bin/check line 49. I'm running perl 5.10.1 on xampp and the following HandExtra Module http://cpansearch.perl.org/src/AUDREYT/Encode-HanExtra-0.23/lib/Encode/HanExtra.pm This is C:/xampp/validator-0.8.6/httpd/cgi-bin/check line 49 : use Encode::HanExtra qw(); # for some chinese character encodings if I document that line using # I get a similar message related to other object: Can't locate loadable object for module Sub::Name in @INC (@INC contains: C:/xampp/perl/lib C:/xampp/perl/site/lib .) at C:/xampp/perl/site/lib/Moose.pm line 12 This is Line 12 at Moose.pm : use Sub::Name 'subname'; I don't know how to proceed. I will appreciate any advise. Thanks

    Read the article

  • sudo port install arm-elf-gcc3 fails with "No defined site for tag: gcc…"

    - by Scott Bayes
    Am trying to get the ARM plugin for Eclipse (http://sourceforge.net/projects/gnuarmeclipse/) going on iMac i7, OS 10.6.3, Xcode 3.2.2 (don't want to upgrade during my project). The plugin needs (IIRC) arm-elf-gcc3, which needs darwinports for "easy" install. Of course, probably due to leftovers when I moved from old MacBook to iMac, Darwin ports 1.8.2 wouldn't install till I built 1.7.1 from source and installed it. darwinports 1.8.1 appears to have been properly installed, but sudo port install arm-elf-gcc3 led to 5-10 minutes of dependencies installs, then the following, produced with port -d (starting from last dependency completion for brevity): DEBUG: Found Dependency: receipt exists for gettext DEBUG: Executing org.macports.main (arm-elf-gcc3) --- Fetching arm-elf-gcc3 DEBUG: Executing org.macports.fetch (arm-elf-gcc3) --- gcc-3.4.6.tar.bz2 doesn't seem to exist in /opt/local/var/macports/distfiles/gcc Error: No defined site for tag: gcc, using master_sites Error: Target org.macports.fetch returned: can't read "host": no such variable DEBUG: Backtrace: can't read "host": no such variable while executing "info exists seen($host)" (procedure "sortsites" line 25) invoked from within "sortsites fetch_urls" (procedure "portfetch::fetchfiles" line 49) invoked from within "portfetch::fetchfiles" (procedure "portfetch::fetch_main" line 16) invoked from within "$procedure $targetname" Warning: the following items did not execute (for arm-elf-gcc3): org.macports.activate org.macports.fetch org.macports.extract org.macports.checksum org.macports.patch org.macports.configure org.macports.build org.macports.destroot org.macports.install Error: Status 1 encountered during processing. (sorry if that's a mess, neither blockquote nor code sample tags seem to properly display cut/pasted text from Terminal.app in preview window). Can anyone advise me on how to get around this (or how to build/install arm-elf-gcc3 from source if necessary)? None of the darwinports FAQs or forums mentioned arm-elf-gcc3 anywhere that I saw.

    Read the article

  • Binding a TreeView with ContextMenu in Xaml

    - by Michael Stoll
    I'm pretty new to Xaml and need some advise. A TreeView should be bound to a hierarchical object structure. The TreeView should have a context menu, which is specific for each object type. I've tried the following: <TreeView> <TreeView.Resources> <DataTemplate x:Key="RoomTemplate"> <TreeViewItem Header="{Binding Name}"> <TreeViewItem.ContextMenu> <ContextMenu> <MenuItem Header="Open" /> <MenuItem Header="Remove" /> </ContextMenu> </TreeViewItem.ContextMenu> </TreeViewItem> </DataTemplate> </TreeView.Resources> <TreeViewItem Header="{Binding Name}" Name="tviRoot" IsExpanded="True" > <TreeViewItem Header="Rooms" ItemsSource="{Binding Rooms}" ItemTemplate="{StaticResource RoomTemplate}"> <TreeViewItem.ContextMenu> <ContextMenu> <MenuItem Header="Add room"></MenuItem> </ContextMenu> </TreeViewItem.ContextMenu> </TreeViewItem> </TreeViewItem> But with this markup the behavior is as intended, but the child items (the rooms) are indented too much. Anyway all the bining samples I could find use TextBlock instead of TreeViewItem in the DataTemplate, but wonder how to integrate the ContextMenu there.

    Read the article

  • Quantis Quantum Random Number Generator (QRNG) - any reviews?

    - by Tim Post
    I am thinking about getting one of these (PCI) to set up an internal entropy pool similar to this service who incidentally brought us fun captcha challenges. Prior to lightening my wallet, I'm hoping to gather feedback from people who may be using this device. As there is no possible 'correct' answer, I am making this CW and tagging it as subjective. I'm undertaking a project to help write Monte Carlo simulations for a non profit that distributes mosquito nets in Malaria stricken areas. The idea is to model areas to determine the best place to distribute mosquito nets. During development, I expect to consume gigs if not more of the RNG output. We really need our own source. Is this device reliable? Does it have to be re-started often? Is its bandwidth really as advertised? It passes all tests, as far as randomness goes (i.e. NIST/DIEHARD). What I don't want is something in deadlock due to some ioctl in disk sleep that does nothing but radiate heat. This is not a spamvertisement, I'm helping out of pocket and I really, really want to know if such a large purchase will bear fruit. I can't afford to build a HRNG based on radioactive decay, this looks like the next best thing. Any comments are appreciated. I will earn zero rep for this, please do not vote to close. This is no different than questions regarding the utilization of some branded GPU for some odd purpose. Answers pointing to other solutions will be gladly accepted, I'm not married to this idea.

    Read the article

  • Newbie, deciding Python or Erlang

    - by Joe
    Hi Guys, I'm a Administrator (unix, Linux and some windows apps such as Exchange) by experience and have never worked on any programming language besides C# and scripting on Bash and lately on powershell. I'm starting out as a service provider and using multiple network/server monitoring tools based on open source (nagios, opennms etc) in order to monitor them. At this moment, being inspired by a design that I came up with, to do more than what is available with the open source at this time, I would like to start programming and test some of these ideas. The requirement is that a server software that captures a stream of data and store them in a database(CouchDB or MongoDB preferably) and the client side (agent installed on a server) would be sending this stream of data on a schedule of every 10 minutes or so. For these two core ideas, I have been reading about Python and Erlang besides ruby. I do plan to use either Amazon or Rackspace where the server platform would run. This gives me the scalability needed when we have more customers with many servers. For that reason alone, I thought Erlang was a better fit(I could be totally wrong, new to this game) and I understand that Erlang has limited support in some ways compared to Ruby or Python. But also I'm totally new to the programming realm of things and any advise would be appreciated grately. Jo

    Read the article

  • WCF NetTcpBinding Security - how does it work?

    - by RemotecUk
    Hi, encountered the following problems trying to work through the quagmire of settings in WCF... I created a WCF client server service using a NetTcp binding. I didn't make any changes to the security settings and when running on one machine it works very nicely. However, when I ran my client from another machine it complained that the server didnt like the security credentials that were sent. I understand now that NetTCP is "secured" by default and that my client would have been passing the wrong security details - namely the windows user name and password (or some form of domain authentication) to my server which as they are not running on the same domain it would not have liked. However, what I don't understand is as follows: I haven't specified any security in my binding - does the standard settings expect a windows user name or password to be sent? I don't have any certificate installed on my server - I understand that NetTCP bindings need some form of public private key to protect the credentials - yet this seemed to work when both client and server were on the same machine - how was the data getting encrypted? Or wants it as WCF knew it was on the same machine and encryption isn't needed? I have had to set my security mode on my client and server to "none" now and they connect nicely. However is there any way to encrypt my data without a certificate? Finally... what is the difference between Transport and Message security? To check my understanding (excuse the scenario!) message security is like if I sent a letter from person A to person B and I encode my hand writing to ensure that if anyone intercepts it they cannot read it? Transport Security is if I decide to have my letter sent by armed transport so that no one can get at it along the way? Is it possible to have any form of encryption in WCF without a certificate? My project is a private project and I dont want to purchase a certificate and the data isnt that sensitive anyway so its just for my own knowledge. Thanks in advance.

    Read the article

  • Debugging StoreKit functionality without a device

    - by Rolf Staflin
    Hi! I'm porting an app with in-app purchase functionality from the iPhone to the iPad, but the simulator doesn't handle any StoreKit calls (they fail immediately with a warning). Since there are no iPads available yet, I can't use a device for debugging. I have thought of a few alternatives: Use the iPhone code as is. This is the safe bet since everything already works on the iPhone, but it will not feel right on the iPad (there are several ViewControllers in a NavigationController involved on the iPhone, but everything could fit on one screen on the pad). Write a test framework for StoreKit. I actually started doing this, but I won't be able to finish it in time. Submit untested code and pray. Nah, just kidding -- that's not an option :) So, any thoughts? Has anyone else written a test framework for this kind of thing? I googled a bit but couldn't find anything. I'm grateful for any thoughts on this!

    Read the article

  • Layout problem: how to place something on top and bottom?

    - by chow
    I want create a layout, with a horizontal LinearLayout(s) on top and bottom, a ListView fill in middle. How can I define the main.xml. I tried to create a layout with horizontal LinearLayout on top, TextView on bottom, a ListView fill in middle; is ok. But after I modified the bottom TextView to LinearLayout, the bottom LinearLayout disappear. <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <TextView android:textSize="12px" android:text="something here" android:layout_width="50px" android:layout_height="wrap_content" /> <TextView android:textSize="12px" android:text="something here" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:gravity="bottom" > <ListView android:id="@+id/listbody" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <LinearLayout android:orientation="horizontal" android:layout_height="wrap_content" android:layout_width="fill_parent" > <TextView android:layout_height="wrap_content" android:layout_width="0dip" android:layout_weight="1" android:textSize="12px" android:text="50%" /> <TextView android:layout_height="wrap_content" android:layout_width="0dip" android:layout_weight="1" android:textSize="12px" android:text="50%" /> </LinearLayout> </LinearLayout> </LinearLayout> Anybody can tell advise? Please help.

    Read the article

  • MFMailComposeController crashing non-deterministically

    - by sss
    Hello, I've been struggling with this issue for a few days. I am trying to use the MFMailComposeController to send emails. What's happening is that the program crashes (long stack-trace below) upon clicking the SEND button. However, this is non-deterministic - sometimes it works immediately, sometimes after a long delay, and most often, it crashes. Here's my code for sending: -(void)mailWithAttachment:(NSString *) fileName type:(NSString*) attachmentType data:(NSData *) attachmentData { MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init]; mc.mailComposeDelegate = self; if ([MFMailComposeViewController canSendMail]) { [mc setSubject:@"my subject"]; [mc setMessageBody:@"my body" isHTML:YES]; [mc addAttachmentData:attachmentData mimeType:attachmentType fileName:fileName]; [self presentModalViewController:mc animated:YES]; } [mc release]; } didFinish result looks like you'd imagine: -(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error { [self dismissModalViewControllerAnimated:YES]; //...some other actions here for other UI logic, but problem persists if removed } And the definition of the class: @interface ShareViewController : UIViewController { //... } Here's the stack trace: #0 0x33568534 in gdb_objc_debuggerModeFailure #1 0x3356634e in _rwlock_write_nodebug #2 0x33560940 in map_images #3 0x2fe0413e in __dyld__ZN4dyldL18notifyBatchPartialE17dyld_image_statesbPFPKcS0_jPK15dyld_image_infoE #4 0x2fe042d4 in __dyld__ZN4dyldL11notifyBatchE17dyld_image_states #5 0x2fe0aee0 in __dyld__ZN11ImageLoader4linkERKNS_11LinkContextEbbRKNS_10RPathChainE #6 0x2fe062d6 in __dyld__ZN4dyld4linkEP11ImageLoaderbRKNS0_10RPathChainE #7 0x2fe08188 in __dyld_dlopen #8 0x30c18fd0 in dlopen #9 0x0000390c in <function called from gdb> #10 0x3356628e in getMethodNoSuper_nolock #11 0x335662b8 in _class_getMethodNoSuper_nolock #12 0x3356518a in lookUpMethod #13 0x33562914 in _class_lookupMethodAndLoadCache #14 0x3356264a in objc_msgSend_uncached #15 0x33562a2a in _class_initialize #16 0x33567dfe in prepareForMethodLookup #17 0x33565168 in lookUpMethod #18 0x33562914 in _class_lookupMethodAndLoadCache #19 0x3356264a in objc_msgSend_uncached #20 0x32b2c288 in +[NSTimeZone(NSTimeZone) defaultTimeZone] #21 0x32b2c246 in -[NSCalendarDate initWithTimeIntervalSinceReferenceDate:] #22 0x32b3beb4 in -[NSDate(NSCalendarDateStuff) descriptionWithCalendarFormat:timeZone:locale:] #23 0x323642fc in -[NSDate(Goodies) descriptionForMimeHeaders] #24 0x32a6e812 in -[MailComposeController headersUseSuspendInfo:] #25 0x32a71e38 in -[MailComposeController messageUseSuspendInfo:endingEditing:] #26 0x32a6e594 in -[MailComposeController _getMessage:] #27 0x32a6e536 in -[MailComposeController message] #28 0x32a72bcc in -[MailComposeController deliverMessageRemotely] #29 0x32a7cab0 in -[_MFMailComposeRootViewController mailComposeControllerCompositionFinished:] #30 0x32a6e0a0 in -[MailComposeController sendMessage] #31 0x32a7086a in -[MailComposeController send:] #32 0x32c29ffa in -[NSObject performSelector:withObject:] #33 0x32a661cc in -[MailComposeView _sendButtonClicked:] I've tried the MFMailComposeController as a child of different views with the same result. Can anyone advise? I'd really appreciate it!

    Read the article

  • The best way to package iPhone/iPad static libraries?

    - by Derek Clarkson
    Hi everyone, I have a couple of static Phone/iPad libraries I an working on. The problem I am looking for advise on is the best way to package the libraries. My objective is to make it easy to use the libraries in other projects and include the correct one in a build with minimal problems. To make it more interesting I currently build 4 versions of each library as follows armv6/armv7 release (devices) i386 release (simulator) armv6/armv7 debug (devices) i386 debug (simulator) The difference between the release and debug versions is that the debug versions contain a lot of NSLog(...) code which enables people to see whats going on internally as an aid to debugging. Currently when I build the whole projects I arrange the libraries into two directories like this: release lib-device.a lib-simulator.a debug lib-device.a lib-simulator.a This works ok except that when include in projects, both paths are added to the library search path and switching a target from one to the other is a pain. Or alternatively I end up with two targets. The alternative I am thinking of is to change the directories like this: release device lib.a simulator lib.a debug device lib.a simulator lib.a In playing with XCode is appears that all xcode uses the lbrary references of a project for is to get the name of the library file, which it then looks up in the library paths. Thus by parameterising the library path with the current built type and target device, I can effectively auto switch. What do you guys think? Is there a better way to do this? ciao Derek

    Read the article

  • LGPL and Dual Licensing Ajax Library

    - by Thomas Hansen
    Hi guys, I'm the previous founder of Gaiaware and Gaia Ajax Widgets and when I used to work there we had this rhetoric (which I have confirmed with some very smart FOSS people is correct) that when using a GPL Ajax library you're basically "distributing" the JavaScript which in turn makes the GPL viral clause kick in and forces people to purchase a proprietary license if they're going to build Closed Source stuff... So now I'm the the LGPL world here with Ra-Ajax which is an LGPL licensed library and I've got no intentions of creating a GPL licensed library since I believe strongly in that the LGPL is the "enabler" of the Open Web to prevail. But something interesting have happened which I think might still give me a "business model" here which is the Linking clause of the LGPL which I think goes something like this (pseudo); "If you link to an LGPL licensed thing you get no restrictions on your own derived works"... But so we started creating something we're calling Ajax Starter-Kits which effectively is a "Project Kickstarter" where you can download a finished project/solution which basically enables you to start out with some pre-done boiler plate code for problems such as Ajax DataGrids, Ajax Calendar Applications, Ajax TreeView Applications etc. And the funny thing is that our users would NOT "link" to these, they would effectively BE our users applications... So to wrap up my question. Would this force users of our LGPL licensed Ajax Starter-Kits to LGPL license their own work? Basically if it does we have a business model (and I get very happy) if not I'd just have to hope people would still like to pay us those $29 for our Starter-Kits to support the project... ;) Help rewarded with extreme gratitude...

    Read the article

  • spring 3 AOP anotated advises

    - by Art79
    Trying to figure out how to Proxy my beans with AOP advices in annotated way. I have a simple class @Service public class RestSampleDao { @MonitorTimer public Collection<User> getUsers(){ .... return users; } } i have created custom annotation for monitoring execution time @Target({ ElementType.METHOD, ElementType.TYPE }) @Retention(RetentionPolicy.RUNTIME) public @interface MonitorTimer { } and advise to do some fake monitoring public class MonitorTimerAdvice implements MethodInterceptor { public Object invoke(MethodInvocation invocation) throws Throwable{ try { long start = System.currentTimeMillis(); Object retVal = invocation.proceed(); long end = System.currentTimeMillis(); long differenceMs = end - start; System.out.println("\ncall took " + differenceMs + " ms "); return retVal; } catch(Throwable t){ System.out.println("\nerror occured"); throw t; } } } now i can use it if i manually proxy the instance of dao like this AnnotationMatchingPointcut pc = new AnnotationMatchingPointcut(null, MonitorTimer.class); Advisor advisor = new DefaultPointcutAdvisor(pc, new MonitorTimerAdvice()); ProxyFactory pf = new ProxyFactory(); pf.setTarget( sampleDao ); pf.addAdvisor(advisor); RestSampleDao proxy = (RestSampleDao) pf.getProxy(); mv.addObject( proxy.getUsers() ); but how do i set it up in Spring so that my custom annotated methods would get proxied by this interceptor automatically? i would like to inject proxied samepleDao instead of real one. Can that be done without xml configurations? i think should be possible to just annotate methods i want to intercept and spring DI would proxy what is necessary. or do i have to use aspectj for that? would prefere simplest solution :- ) thanks a lot for help!

    Read the article

  • People not respecting good practices at workplace

    - by VexXtreme
    Hi There are some major issues in my company regarding practices, procedures and methodologies. First of all, we're a small firm and there are only 3-4 developers, one of which is our boss who isn't really a programmer, he just chimes in now and then and tries to do code some simple things. The biggest problems are: Major cowboy coding and lack of methodologies. I've tried explaining to everyone the benefits of TDD and unit testing, but I only got weird looks as if I'm talking nonsense. Even the boss gave me the reaction along the lines of "why do we need that? it's just unnecessary overhead and a waste of time". Nobody uses design patterns. I have to tell people not to write business logic in code behind, I have to remind them not to hardcode concrete implementations and dependencies into classes and cetera. I often feel like a nazi because of this and people think I'm enforcing unnecessary policies and use of design patterns. The biggest problem of all is that people don't even respect common sense security policies. I've noticed that college students who work on tech support use our continuous integration and source control server as a dump to store their music, videos, series they download from torrents and so on. You can imagine the horror when I realized that most of the partition reserved for source control backups was used by entire seasons of TV series and movies. Our development server isn't even connected to an UPS and surge protection. It's just plugged straight into the wall outlet. I asked the boss to buy surge protection, but he said it's unnecessary. All in all, I like working here because the atmosphere is very relaxed, money is good and we're all like a family (so don't advise me to quit), but I simply don't know how to explain to people that they need to stick to some standards and good practices in IT industry and that they can't behave so irresponsibly. Thanks for the advice

    Read the article

< Previous Page | 82 83 84 85 86 87 88 89 90 91 92 93  | Next Page >