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  • Optimization of a Hybrid Pagination Scheme

    - by Kaustubh Karkare
    I'm working on a Web Application using node.js in which I'm building a partial copy of the database on the client-side to decrease the load on my server. Right now, I have a function like this (expressed as python-style pseudocode, but implemented in JavaScript): get(table_name,primary_key): if primary_key in cache[table_name]: return cache[table_name][primary_key] else: x = get_data_from_server(table_name,primary_key) # socket.io return cache[table_name][primary_key] = x While this scheme works perfectly well for caching individual rows, I'd like to extend it to support the creation of paginated tables ordered according to the primary_key, and loading additional data using the above function for only the current and possibly the adjacent pages. Now, I don't want to keep the list of primary keys on the server to be retrieved every time I need to change the page (which, for reasons beyond the scope here, will be very frequent), and keeping it on the client side, subject to real-time create/delete events from the server, doesn't seem that good an idea, even after compression (using ranges, instead of individual values). What is the best way to calculate which items are to be displayed on a random page, minimizing the space requirements & the need for communication with the server?

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  • what tools and technologies an Technical Java Architect must hava [on hold]

    - by vicky
    I have more then eight years of experience in different Java tools, technologies and domains. Currently I am employed as a Technical Java Architect. I have worked on mobile, web, webservices, database, backend and desktop applications during this period. Everything was OK untill I got a few very good offers regarding an enterprise architect, solutions architect, java architects roles. But each one required different tool set. One was regarding experience in all Apache stack and technologies. So, help me which tools and technologies a real java technical Architect shuold have ? So that I can equip myself with that. Thanks.

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  • Is there a size limit when using UICollectionView as tiled map for iOS game?

    - by Alexander Winn
    I'm working on a turn-based strategy game for iOS, (picture Civilization 2 as an example), and I'm considering using a UICollectionView as my game map. Each cell would be a tile, and I could use the "didSelectCell" method to handle player interaction with each tile. Here's my question: I know that UICollectionViewCells are dequeued and reused by the OS, so does that mean that the map could support an effectively infinitely-large map, so long as only a few cells are onscreen at a time? However many cells were onscreen would be held in memory, and obviously the data source would take up some memory, but would my offscreen map be limited to a certain size or could it be enormous so long as the number of cells visible at any one time wasn't too much for the device to handle? Basically, is there any memory weight to offscreen cells, or do only visible cells have any impact?

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  • automount smb share customization

    - by Douda
    as a new linux user, used Ubuntu 12.10, I tried several tweaks with the SMB shares. I followed this tutorial to mount permanently 4 SMB shares from my local NAS. To resume, I : edit /etc/fstab added a line like : //servername/sharename /media/windowsshare cifs credentials=/home/ubuntuusername/.smbcredentials,iocharset=utf8,file_mode=0777,dir_mode=0777 0 0 created a credentials file for security reasons in my home folder (explained in the tutorial) ~/.smbcredentials It work perfectly, they are automounted on each reboot, but when I logon, I all the time get 4 file explorer open with each share. It is possible to avoid these file explorer window to be opened on every reboot ? I guess it's related to X or via a explicit deny or these graphical mount, but I don't have any clues on how to proceed Thank you for your time,

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  • Why is my content database so large?

    - by PeterBrunone
    If your SharePoint site collection hasn't grown, but your content database has, the most likely culprit is versioning.  If a list -- or worse, a library -- has versioning enabled, the default is to keep every single one.  That means that every time someone edits and checks in a document, its storage footprint increases by the size of the document (and probably a little more).The solution?  It could be a bit painful, but you'll need to go back into each library and restrict the number of versions to keep (three is sufficient for most uses, but your needs may vary).  I suggest keeping only major versions as well, since minor versions are really just stopping points on the way to a published document.Of course if you have a real business need to keep all those versions around, then you'll want to look into an archiving solution that will take the old versions out of the content database but still make them available if necessary.

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  • Letting go of a project

    - by SkyOrg
    I've been the sole developer of a niche product for my company for nearly 6 years. I've grown quite attached to the project and I enjoy working on it. However, it was the decision of management to take the project out of my hands and move it under the wings of another team. Unfortunately, I'm having a hard time letting go of the project. I'm sad to see it leave my hands since I've put so much time into it and enjoyed working on it, but it also allows me to work on new things. I've even caught myself being a bit hostile to the other team, which is poor on my part. How can I convince myself to just let it go?

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  • Dealing with frustration when things don't work.

    - by John Isaacks
    You ever try to implement something simple but for some strange reason it doesn't work. So you try a possible solution but then something else doesn't work. You keep trying different workarounds but every time something different isn't working. Every time you get one step closer you also get one (or more) step farther from solving this problem and its now been 3 hours when this should have taken you 10 minutes. And it still isn't solved. There is no one in your company who can help, and you are about to put your fist through your screen. At this point you are so frustrated you can no longer think about the problem clearly. What should you do at this point? Or what can you do to avoid reaching this point?

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  • ETL Software Research Question

    - by WernerCD
    Where I work, we use an in-house ETL solution that's homegrown and has been around for 5-10 years. I'm still new to my data analysis job, but I was wondering about the ETL tools that are out there. This is a new area for me. My situation, and job, is basically digging in a set of databases (DB2, SQL2005, Citrix, Ancient Cobol Database with a SQL Wrapper on top, MySQL, etc). Gather the desired information. combine the different datasets into one set. output into a file of choice (CSV, Tab Separated, Pipe Separated, XLS, etc). FTP to customer. I guess what my real question is, given my job, what are some good ETL suites that I can look at and compare to my in-house tools? This is more to research some other options. Ultimately, I'd either suggest a new solution or get options/ideas to improve our current app.

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  • T-SQL Tuesday #36 (#tsql2sday)– Post-PASS Summit Depression

    - by Argenis
    I had an email thread going with a prominent member of the SQL Server community today, where he confessed that he didn’t attend any sessions during the PASS Summit last week. He spent all of this time networking and catching up with people. I, personally, can relate. This year’s Summit was another incarnation of that ritual of SQL Server professionals meeting to share their knowledge, experience, and just have a wonderful time while doing so. It’s been a few days after the Summit is over, and I’m definitely dealing with withdrawal. My name is Argenis, and I’m a #SQLFamilyHolic.         (This post is part of the T-SQL Tuesday series, a monthly series of blog posts from members of the SQL Server community – this month, Chris Yates is hosting)

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  • How can I change my "Desktop bar"?

    - by d_Joke
    The problem: In Gnome 3.4 when I click the main menu, it's white. The text of the menu is also white. Original text: I have a problem. When I installed the new version of Gnome (3.4) the "Desktop bar" (I'm sorry, I don't know what's the real name of that bar, but is the bar on the top on Ubuntu 11.10) every time I click on the username icon, or the battery, etc., the menu comes on gray or white and the letters are white. I know maybe this is a stupid question but it annoys me. Besides, my username doest not appear on the login screen. I tried to reset my settings, I delete gnome, and check the Unsettings and CompizConfig but the problem is still there. Maybe I miss something on the process of looking on any configuration tool but I don't think so... Sorry if the question is something basic or even stupid but I'm new on Ubuntu and I'm experimenting whit it.

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  • Open Source: Is Testing/Bug Reporting A Major Contribution?

    - by dsimcha
    When evaluating contributions to open source projects, does testing the code on various real-world inputs, reducing a large number of complicated bugs to small test cases and filing good bug reports count as a significant contribution? I've done this for several open-source projects (specifically D compilers) where I wanted to help out but the codebase was too complicated to learn my way around in the amount of spare time I have. I'm interested in both the perspective of the main developers (those that write the code and fix the bugs) and from the perspective of employers (in case I want to put it on my resume at some point).

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  • How important is the unit test in the software development?

    - by Lo Wai Lun
    We are doing software testing by testing a lot if I/O cases, so developers and system analysts can open reviews and test for their committed code within a given time period (e.g. 1 week). But when it come across with extracting information from a database, how to consider the cases and the corresponding methodology to start with? Although that is more likely to be a case studies because the unit-testing depends on the project we have involved which is too specific and particular most of the time. What is the general overview of the steps and precautions for unit-testing?

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  • Google Games Chat #6

    Google Games Chat #6 Google Games Chat is back once again. What kinds of crazy topics will be talking about this time around? Will Todd ever finish Skyrim? What Google employee and/or homeless person is sleeping behind the couch this week? Tune in and find out! Ask us questions in the moderator link! We might even get around to answering them! From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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  • 301 redirects - can we not delete old pages?

    - by KBS
    First time here :) We have a page on the site which ranks well for an SEO term (top 5) but contains old information. We have added a new page but Google doesn't rank it that well. Information on these pages is time sensitive. Old: example.com/2013-related-information.html New: example.com/2014-related-information.html Obvious solution is to delete old page and do a 301 redirect to the new page. Now, can we still keep the old page by giving it a new URL. Step1: example.com/2013-related-information.html is redirect to example.com/2014-related-information.html Step2: example.com/2014-related-information.html is recreated with a new address such as example.com/new-2013-related-information.html What we are trying to do is to send the user to the fresh page but still not wasting the record copy if someone wants to go and dig up old page. Would appreciate help!! Cheers

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  • Best practice for SEO "special characters" in products pages

    - by rhodesit
    Whats a best practice for creating websites do to the fact that i need to enter "ö" within the content/title/meta. Should I spell it without, and just use a "normal" character or do i put in this code everywhere. or do i spell it half the time with and half the time without. whats the best practice for seo? Google takes into account user intent. Which makes things complicated(in my mind). The user will be searching without the "special characters" but because of the whole "user intent" thing, I don't know the best practice for this situation is. Should I use a mix of both spellings? Should I use the special characters in anchortext/headers/title/metadescription?

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  • How do you choose a programming/data structure/algorithm book?

    - by Fanatic23
    I really should not be mentioning the name of the book, but the first time I read it (during my under-grad days) I almost concluded that data structure was a bad course to pick. Which brings me to the question I am asking here. What makes a programming or data structure or algorithm book tick? Clearly, lucid explanation is one. But I also realize that organization of the material is very important and so is diagrams. What else? Some pointers would obviously help when I hang out in my neighborhood computer book shop the next time.

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  • UK OUG Conference Highlights and Insights

    - by Richard Bingham
    As per my preemptive post, this was the first time the annual conference organized by the UK Oracle User Group (UKOUG) was split into two events, one for Oracle Applications and another in December for Oracle Technology. Apps13, as it was branded, was hailed as a success, with over 1000 registered attendees and three days of sessions, exhibition, round-tables and many other types of content. As this poster on their stand illustrates, the UKOUG is a strong community with popular participants from both big and small Oracle partners and customers. The venue was a more intimate setting than previous years also, allowing everyone to casually bump into those they hoped to. It gave a real feeling of an Apps Community. The main themes over the days where CRM and Customer Experience, HCM, and FIN/SCM. This allowed people to attend just one focused day if they wanted. In addition the Apps Transformation stream ran across all three days, offering insights, advice, and details on the newer product solutions like Fusion Applications.  Here are some of the key take-aways I got from the conference, specific to my role in Fusion Applications Developer Relations: User Experience continues to be a significant reason for adopting some of the newer application products available, with immediately obvious gains in user productivity and satisfaction reported by customers. Also this doesn't stop with the baked-in UX either, with their Design Patterns proving popular and indeed currently being extended to including things like extending on ADF mobile and customizing the Simplified UI. More on this to come from us soon. The executive sessions emphasized the "it's a journey" phrase, illustrating that modern business applications are powered by technologies such as Cloud, Mobile, Social and Big Data and these can be harnessed to help propel your organization forward. Indeed the emphasis is away from the traditional vendor prescribed linear applications road map, and towards plotting a course based on business priorities supported by a broad range of integrated solutions. To help with this several conference sessions demoed the new "Applications Navigator" tool, developed in partnership with OUG members, which offers a visual framework to help organizations plan their Oracle Applications investments around business and technology imperatives. Initial reaction was positive, especially as customers do not need to decipher Oracle's huge product catalog and embeds the best blend of proven and integrated applications solutions. We'll share more on this when it is generally available. Several sessions focused around explanations and interpretation of Oracle OpenWorld 2013, helping highlight the key Oracle Applications messages and directions. With a relative small percentage of conference attendees also at OpenWorld (from a show of hands) this was a popular way to distill the information available down into specific items of interest for the community. Please note the original OpenWorld 2013 content is still available for download but will not remain available forever (via the Oracle website OpenWorld Content Catalog > pick a session > see the PDF download). With the release of E-Business Suite 12.2 the move to develop and deploy on the Fusion Middleware stack becomes a reality for many Oracle Applications customers. This coupled with recent E-Business Suite features such as the Integrated SOA Gateway and the E-Business Suite SDK for Java, illustrates how the gap between the technologies and techniques involved in extending E-Business Suite and Fusion Applications is quickly narrowing. We'll see this merging continue to evolve going forwards. Getting started with Oracle Cloud Applications is actually easier than many customers expected, with a broad selection of both large and medium sized organizations explaining how they added new features to their existing Oracle Applications portfolios. New functionality available from Fusion HCM and CX are popular extensions that do not have to disrupt those core business services. Coexistence is the buzzword here, and the available integration is also simpler than many expected, commonly involving an initial setup data load, then regularly incremental synchronizations, often without a need for real-time constant communication between systems. With much of this pre-built already the implementation process is also quite rapid. With most people dressed in suits, we wanted to get the conversations going without the traditional english reserve, so we decided to make ourselves a bit more obvious, as the photo below shows. This seemed to be quite successful and helped those interested identify and approach us. Keep a look out for similar again. In fact if you're in the UK there is an "Apps Transformation Day" planned by the UKOUG for the 19th March 2014, with more details to follow. Again something we'll be sure to participate in. I am hoping to attend the next half of the UKOUG annual conference, Tech13, that focuses more on Oracle technology and where there is more likely to be larger attendance of those interested in the lower-level aspects of applications customization and development. If you're going, let me know and maybe we can meet up.

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  • How relevant is PHP today for browser games?

    - by Bitgarden
    I was the lead developer of 2 moderately successful browser games quite a few years back, and plan on working on a new game soon. At the time, I wrote them in pure PHP (no template engine or anything of the sort). I'd like to start working on a new game, but have been out of the web development world for a while. Reading around, I hear a lot of good about Rails, Django, Node.js, etc., with which I have no experience (although I know my way around Python, Javascript, and the others quite well). So my question is the following- if I were to go in my old ways and go with PHP again, would I be making things hard for myself? Would picking something more "trendy" have a real impact on my development? In addition, does anyone have any pointers relating to specifically developing browser games with these more modern tools?

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  • How do I optimize searching for the nearest point?

    - by Rootosaurus
    For a little project of mine I'm trying to implement a space colonization algorithm in order to grow trees. The current implementation of this algorithm works fine. But I have to optimize the whole thing in order to make it generate faster. I work with 1 to 300K of random attraction points to generate one tree, and it takes a lot of time to compute and compare distances between attraction points and tree node in order to keep only the closest treenode for an attraction point. So I was wondering if some solutions exist (I know they must exist) in order to avoid the time loss looping on each tree node for each attraction point to find the closest... and so on until the tree is finished.

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  • Entry level developer career advice [closed]

    - by Evan
    I just got done with college and I have a full time job with a large software company that I have been an intern at for over a year. As an intern I was on the web team doing lots of architecture and developing UI in ExtJS and some Java backend experience. Now as a full time employee I am mainly doing ExtJS applications, which I enjoy a lot, and I want to stay in the web development field, but: Am I limiting my career options with just doing ExtJS stuff? Will experience in ExtJS help or hinder my programming skills? Will I be looked down upon because I'm only gaining experienced with ExtJS?

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  • Images Loading Very Slowly

    - by Vecta
    I'm currently working on optimizing my site to try to decrease load time by using Pingdom tools. I seem to be having some difficulty with long load times on images. For example, the body background for my site is a 29kb file but takes almost 500 ms to load, the majority of which is spent connecting to the server. This one seems to take the longest times but other images seem to take a lot of time as well—the majority of which seems to be spent connecting to the server. This also seems to fluctuate as I've seen the same image load in 500ms one minute and ten minutes later load in 1.5 seconds. My site is using the Modx CMS but I'm not sure if that would affect this at all. Is it more likely that this is a server issue? Is there anything that I should check or do to help alleviate these inflated 'connect' times?

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  • How can I fix latency problems for car game?

    - by Freddy
    Basically I'm trying to make a online car racing game for IOS using Game Center real time multiplayer. I have setup a timer that sends data every 0.02 seconds to the other player with the current position and current angle. However sometimes, it will take LONGER then these 0.02 seconds for the package to be sent and then received. In this case i have implemented a method that "calculate" what the next position should be if no position is received based on the last position and angle. However, when the data then receives for let say 0.04 seconds after, it will change back to the last position, which will result in the car "jumping" back and lag. And If i just keep ignoring the data it will never take any input from the other user. Is their any way to prevent this? I suppose this needs to be fixed with some client-sided algorithm.

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  • Google Maps API Office Hours

    Google Maps API Office Hours Interested in knowing more about the Google Maps API announcements that were made at I/O? During this week's Google Maps API Office Hours, +Josh Livni and +Paul Saxman will give an overview of the Google Maps API features that were announced at I/O, and will talk about the I/O session content that is now available online. The next Office Hours will be this Tuesday at 11am, Pacific Time. Bring your questions, and join us there! From: GoogleDevelopers Views: 167 9 ratings Time: 21:25 More in Science & Technology

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  • Why Wikipedia doesn't appear as a referral in Google Analytics' Traffic sources?

    - by Rober
    One of my clients has a website and got not spammy backlinks in a Wikipedia article. When I test it for SEO purposes with Google Analytics (from different IPs), apparently there is no referral information. On the Real-Time view my test visit is visible but with There is no data for this view in the referrals subview. And this visits appear as (direct) / (none) on the Traffic sources view. Wikipedia is not hiding in any way its links origin, since it is shown in the server visits log. Is Google ignoring Wikipedia as a referral? Am I missing anything else? Update: Now it works, several days after the link was active. Maybe something is detecting for how long the link was there so that it doesn't work just from the beggining, as a security measure? Many visits are actually not recorded.

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  • What Exactly Does the Wattage Rating on a Power Supply Unit Mean?

    - by Jason Fitzpatrick
    Your PSU is rated 80 Plus Bronze and for 650 watts, but what exactly does that mean? Read on to see how wattage and power efficiency ratings translate to real world use. Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. How To Use USB Drives With the Nexus 7 and Other Android Devices Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It

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