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  • Disable a form and all contained elements until an ajax query completes (or another solution to prev

    - by Max Williams
    I have a search form with inputs and selects, and when any input/select is changed i run some js and then make an ajax query with jquery. I want to stop the user from making further changes to the form while the request is in progress, as at the moment they can initiate several remote searches at once, effectively causing a race between the different searches. It seems like the best solution to this is to prevent the user from interacting with the form while waiting for the request to come back. At the moment i'm doing this in the dumbest way possible by hiding the form before making the ajax query and then showing it again on success/error. This solves the problem but looks horrible and isn't really acceptable. Is there another, better way to prevent interaction with the form? To make things more complicated, to allow nice-looking selects, the user actually interacts with spans which have js hooked up to them to tie them to the actual, hidden, selects. So, even though the spans aren't inputs, they are contained in the form and represent the actual interactive elements of the form. Grateful for any advice - max. Here's what i'm doing now: function submitQuestionSearchForm(){ //bunch of irrelevant stuff var questionSearchForm = jQuery("#searchForm"); questionSearchForm.addClass("searching"); jQuery.ajax({ async: true, data: jQuery.param(questionSearchForm.serializeArray()), dataType: 'script', type: 'get', url: "/questions", success: function(msg){ //more irrelevant stuff questionSearchForm.removeClass("searching"); }, error: function(msg){ questionSearchForm.removeClass("searching"); } }); return true; }

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  • How can I avoid garbage collection delays in Java games? (Best Practices)

    - by Brian
    I'm performance tuning interactive games in Java for the Android platform. Once in a while there is a hiccup in drawing and interaction for garbage collection. Usually it's less than one tenth of a second, but sometimes it can be as large as 200ms on very slow devices. I am using the ddms profiler (part of the Android SDK) to search out where my memory allocations come from and excise them from my inner drawing and logic loops. The worst offender had been short loops done like, for(GameObject gob : interactiveObjects) gob.onDraw(canvas); where every single time the loop was executed there was an iterator allocated. I'm using arrays (ArrayList) for my objects now. If I ever want trees or hashes in an inner loop I know that I need to be careful or even reimplement them instead of using the Java Collections framework since I can't afford the extra garbage collection. That may come up when I'm looking at priority queues. I also have trouble where I want to display scores and progress using Canvas.drawText. This is bad, canvas.drawText("Your score is: " + Score.points, x, y, paint); because Strings, char arrays and StringBuffers will be allocated all over to make it work. If you have a few text display items and run the frame 60 times a second that begins to add up and will increase your garbage collection hiccups. I think the best choice here is to keep char[] arrays and decode your int or double manually into it and concatenate strings onto the beginning and end. I'd like to hear if there's something cleaner. I know there must be others out there dealing with this. How do you handle it and what are the pitfalls and best practices you've discovered to run interactively on Java or Android? These gc issues are enough to make me miss manual memory management, but not very much.

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  • Questions about shifting from mysql to PDO

    - by Scarface
    Hey guys I have recently decided to switch all my current plain mysql queries performed with php mysql_query to PDO style queries to improve performance, portability and security. I just have some quick questions for any experts in this database interaction tool Will it prevent injection if all statements are prepared? (I noticed on php.net it wrote 'however, if other portions of the query are being built up with unescaped input, SQL injection is still possible' I was not exactly sure what this meant). Does this just mean that if all variables are run through a prepare function it is safe, and if some are directly inserted then it is not? Currently I have a connection at the top of my page and queries performed during the rest of the page. I took a look at PDO in more detail and noticed that there is a try and catch procedure for every query involving a connection and the closing of that connection. Is there a straightforward way to connecting and then reusing that connection without having to put everything in a try or constantly repeat the procedure by connecting, querying and closing? Can anyone briefly explain in layman's terms what purpose a set_exception_handler serves? I appreciate any advice from any more experienced individuals.

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  • How to store arbitrary data for some HTML tags

    - by nickf
    I'm making a page which has some interaction provided by javascript. Just as an example: links which send an AJAX request to get the content of articles and then display that data in a div. Obviously in this example, I need each link to store an extra bit of information: the id of the article. The way I've been handling it in case was to put that information in the href link this: <a class="article" href="#5"> I then use jQuery to find the a.article elements and attach the appropriate event handler. (don't get too hung up on the usability or semantics here, it's just an example) Anyway, this method works, but it smells a bit, and isn't extensible at all (what happens if the click function has more than one parameter? what if some of those parameters are optional?) The immediately obvious answer was to use attributes on the element. I mean, that's what they're for, right? (Kind of). <a articleid="5" href="link/for/non-js-users.html"> In my recent question I asked if this method was valid, and it turns out that short of defining my own DTD (I don't), then no, it's not valid or reliable. A common response was to put the data into the class attribute (though that might have been because of my poorly-chosen example), but to me, this smells even more. Yes it's technically valid, but it's not a great solution. Another method I'd used in the past was to actually generate some JS and insert it into the page in a <script> tag, creating a struct which would associate with the object. var myData = { link0 : { articleId : 5, target : '#showMessage' // etc... }, link1 : { articleId : 13 } }; <a href="..." id="link0"> But this can be a real pain in butt to maintain and is generally just very messy. So, to get to the question, how do you store arbitrary pieces of information for HTML tags?

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  • How to target SCOM 2007 R2 monitor to monitor only one server

    - by Trondh
    Hi, This might be basic, but hopefully someone can help me: We have a well-working SCOM 2007 R2 implementation monitoring our Microsoft infrastructure. Now, on one of these servers there's an event (logged to the eventlog) that I need to be alerted on. I have created a group and put this one windows server in it. Then, I created a monitor with simple event detection, entered the event id and used the group name as "monitor target". This doesnt work - the monitor doesn't show up in health explorer at all. However, If I create the monitor with "Windows computers" as target it works, but that means I'll have to disable the monitor, and then enable it for the group, which is cumbersome and slightly illogical to me. Is this by design, or am I doing something wrong?

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  • Recommendations on laptops - long battery life, slim, Windows 7

    - by molecule
    Hi, I have been looking at a couple of laptops... The most important requirement is long battery life, slim & light, and runs Windows 7. One that seems to fit the bill is the Sony Vaio Z series laptops. They claim to have long battery life, have some really impressive specs (on paper) and a very nice design. They are not on sale where I am yet but has seen/used them? Second would be the Lenovo Thinkpad IBM x301 For business users, Thinkpad seems to be the way to go. I have also considered Dell Alienware M11x but may not be completely appropriate for business use? What would you recommend with a budget of USD1500-2000?

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  • Magento Community - Hosting :: Need Advice which sharing hosting will run magento fast

    - by user43353
    Hi, Need Advice which sharing hosting will run Magento Community fast or some other not expensive solution. This website will not have a lot of users, I only need that it will run fast for 100-20 users in same time. The problem with magento is database design that make this system very slow , also other staff not the best. I had hostmonster.com and justhost.com for previous website but it wasn't fast enough for single user that not located in USA (my customer areas: Asia, Africa). each action that involve database takes a lot of time. Thanks

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  • Magento Community - Hosting :: Need Advice which sharing hosting will run magento fast

    - by user43353
    Hi, Need Advice which sharing hosting will run Magento Community fast or some other not expensive solution. This website will not have a lot of users, I only need that it will run fast for 100-20 users in same time. The problem with magento is database design that make this system very slow , also other staff not the best. I had hostmonster.com and justhost.com for previous website but it wasn't fast enough for single user that not located in USA (my customer areas: Asia, Africa). each action that involve database takes a lot of time. Thanks

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  • Why is this PHP loop rendering every row twice?

    - by Christopher
    I'm working on a real frankensite here not of my own design. There's a rudimentary CMS and one of the pages shows customer records from a MySQL DB. For some reason, it has no probs picking up the data from the DB - there's no duplicate records - but it renders each row twice. The page PHP is viewable at http://christopher.pastebin.com/DQkjjG3s (attempted to include in this post but it was horribly mangled, think it's important to have it all in context). I'm not the world's best PHP expert but I think I can see an error in a for loop when there is one... But everything looks ok to me. You'll notice that the customer name is clickable; clicking takes you to another page where you can view their full info as held in the DB - and for both rows, the customer ID is identical, and manually checking the DB shows there's no duplicate entries. The code is definitely rendering each row twice, but for what reason I have no idea. All pointers / advice appreciated.

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  • Mail server responds with Error 500 line too long

    - by mawimawi
    I am occasionally receiving error messages from mail servers with the above message. It seems that at least one line in the e-mail has more than 999 characters and therefore the e-mail is bounced. Is this "by design"? in an RFC? Or some weird pseudo-spam-filter? Or just a bad mailserver? I googled around a bit but did not find a competent answer. Hopefully one of you guys can enlighten me.

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  • Do MSDTC and disaster recovery go together?

    - by DevDelivery
    Our application writes to multiple Sql Server databases within a distributed transaction. The Ops guys are saying that this messes up their disaster recovery plan because while the transactions on the live tables may commit at the same time, the log shipping on the separate databases happen at slightly different times. So in in a disaster recovery situation, there will be a few partial transactions. Is there a method for maintaining separate but synced databases in DR? Or do we have to re-design to relatively independent databases (or a single database)?

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  • scalability with nginx, passenger, ruby on rails setup

    - by Dani Cela
    Hey guys I had a question regarding scalability for my RoR application. We have been optimizing our application over the last few days and after running blitz.io, notice that our application times out after maybe 1000 hits in 30 seconds we experienced massive timeouts. In the 1 minute test apparently 74% of users would have timed out. Look at the performance of my website: http://blitz.io/report/1c8eb2f395a5eadeabd62fd831ada9e5 Not saying that our website will in any way experience this now, but I wish to design the infrastructure to handle this. What is normally done in this situation? Currently we have one web server and one database server. Would load balancing be the route to go?

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  • Saving a modified InfoPath form to its form library

    - by Nathan Lykken
    Within our corporate SharePoint 2007 site, there is a particular form library that contains 10 separate files. 9 of these are either Excel, Word, or PowerPoint files and one of these is an InfoPath 2007 form that serves as a report. After noticing an error within this InfoPath form, I saved this InfoPath form to my local directory and then, within the design mode of InfoPath, I modified this InfoPath form. What is the proper way to save this modified InfoPath form to its form library? Everything that I have tried results in nobody except myself having access to this modified InfoPath form. I can open this InfoPath form without error but when my coworkers try to open this InfoPath form on their machines, they receive this error: “The form cannot be opened because it requires the domain permission level and it currently has restricted permission. To fix this problem, open the form from the location it was published to."

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  • What proportion of DBA skills are platform-independent?

    - by Arkaaito
    Problem: we've grown to the point where we need a real DBA. Real DBAs are hard to find. Possible solution: I know someone with extensive experience (currently working on MSSQL) who is looking for a new DBA job. He might be willing to consider working for a MySQL shop (I haven't asked). Snag: I don't know to what extent MSSQL DBA skills map to MySQL DBA skills. I'm a developer, so I know enough about MySQL to develop apps which use it (including the basic performance-tuning, index selection, etc.), do schema design, and perform simple utility tasks (backup with mysqldump, scripting, etc.). I don't know anything about MSSQL. Nor do I actually know much about the boundaries of the DBA role. Can anyone with more experience - perhaps as a DBA - weigh in on this? Are there enough similarities between MSSQL and MySQL that it's worth asking a MSSQL DBA if he'd be interested in applying for a MySQL position?

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  • pfsense multi-site VPN VOIP deployment

    - by sysconfig
    have main office pfsense firewall configured like this: local networks WAN - internet LAN - local network VOIP - IP phones need to connect remote offices (multi-users) and single remote users (from home) use IPSEC or OpenVPN to build "permanent" automatically connecting tunnels from remote location to main location. in remote locations, network will look like this: WAN - internet LAN - local network multiple users VOIP - multiple IP phones in order for the IP phones to work they have to be able to "see" the VOIP network and the VOIP server back at the main office for single remote users ( like from home ) the setup will be similar but only one phone and one computer so questions: best way to tie networks together? IPSEC or OpenVPN can this be setup to automatically connect ? any issues/suggestions with that design/topology ? QoS or issues with running the VOIP traffic over a VPN throughput, quality etc.. obviously depends on remote locations connection to some degree

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  • Windows Server 2003 IPSec Tunnel Connected, But Not Working (Possibly NAT/RRAS Related)

    - by Kevinoid
    Configuration I have setup a "raw" IPSec tunnel between a Windows Server 2003 (SBS) machine and a Netgear FVG318 according to the instructions in Microsoft KB816514. The configuration is as follows (using the same conventions as the article): NetA | SBS2003 | FVG318 | NetB 10.0.0.0/24 | 216.x.x.x | 69.y.y.y | 10.0.254.0/24 Both the Main Mode and Quick Mode Security Associations are successfully completed and appear in the IP Security Monitor. I am also able to ping the SBS2003 server on its private address from any computer on NetB. The Problem Any traffic sent from a computer on NetA to NetB, or from SBS2003 to NetB (excluding ICMP Ping responses), is sent out on the public network interface outside the IPSec tunnel (no encryption or header authentication, as if the tunnel were not there). Pings sent from a computer on NetB to a computer on NetA successfully reach computers on NetA, but the responses are silently discarded by SBS2003 (they do not go out in the clear and do not generate any encrypted traffic). Possible Solutions Incorrect Configuration I could have mistyped something, somewhere, or KB816514 could be incorrect in some way. I have tried very hard to eliminate the first option. Have re-created the configuration several times, tried tweaking and adjusting all the settings I could without success (most prevent the SA from being established). NAT/RRAS I have seen multiple posts elsewhere suggesting that this could be due to interaction between NAT and the IPSec filters. Possibly the NetA private addresses get rewritten to 216.x.x.x before being compared with the Quick Mode IPSec filters and don't get tunneled because of the mismatch. In fact, The Cable Guy article from June 2005 "TCP/IP Packet Processing Paths" suggests that this is the case, (see step 2 and 4 of the Transit Traffic path). If this is the case, is there a way to exclude NetA-NetB traffic from NAT? Any thoughts, ideas, suggestions, and/or comments are appreciated. Update (2011-06-26) After failing to solve the problem, I resorted to paid Microsoft support. They were unable to solve the problem. Since then I have implemented a solution based on Linux that is working quite well. I will attempt to evaluate any proposed answers as best I can, but current configurations and time constraints will make this slow...

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  • pfsense multi-site VPN VOIP deployment

    - by sysconfig
    have main office pfsense firewall configured like this: local networks WAN - internet LAN - local network VOIP - IP phones need to connect remote offices (multi-users) and single remote users (from home) use IPSEC or OpenVPN to build "permanent" automatically connecting tunnels from remote location to main location. in remote locations, network will look like this: WAN - internet LAN - local network multiple users VOIP - multiple IP phones in order for the IP phones to work they have to be able to "see" the VOIP network and the VOIP server back at the main office for single remote users ( like from home ) the setup will be similar but only one phone and one computer so questions: best way to tie networks together? IPSEC or OpenVPN can this be setup to automatically connect ? any issues/suggestions with that design/topology ? QoS or issues with running the VOIP traffic over a VPN throughput, quality etc.. obviously depends on remote locations connection to some degree

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  • apache2 mod_proxy configuration for single threaded servers

    - by The Doctor What
    I have a multiple instances of thin running behind apache 2.2's mod_proxy. The problem I have is that a couple pages, by design, take a while to run. If I just configure apache the obvious way (just add the thin urls as BalanceMember lines and no other configurations) then what happens is if someone clicks on the long-running page, then if enough web requests happen while it is running, someone eventually gets the same thin server and has to wait. Does anyone have some best practices or suggested configuration for mod_proxy and thin? Ciao!

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  • Are there any HTPC-optimized web browsers?

    - by smackfu
    Features that I would ideally include in "HTPC-optimized": Full-screen. Navigable using a remote or the keyboard arrows. Legible at couch distances. Or, to put it another way, imagine the design requirements for Hulu Desktop or XBMC or WMC, applied to a web browser. Opera on a Wii meets most of these criteria but not being HD wastes a lot of potential. If a single solution doesn't exist, is there some combination of Firefox add-ons that will get me there?

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  • Dual HDMI input - HD Video Capture Card

    - by Shivan Raptor
    Any suggestion for HD video capture card? Here is my requirements: I need 2 HDMI input for 2 HD Camera the signal captured will be encoded with Adobe Live Encoder (does it support dual input sources? I do not require mixing of 2 sources) the encoding format will be H.264 (720p), then will be sent to Adobe Flash Media Interactive Server for LIVE broadcasting. http://www.blackmagic-design.com/products/intensity/ I found the one above online, but I am not sure about its performance, and it has only 1 HDMI input. If I plug 2 of them into my workstation, will it conflict with each other?

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  • Colors differ in the dual monitor

    - by becomingGuru
    I use a dual monitor. The colors appear entirely different on the new monitor than they do on my laptop. When you are selecting colors etc, to be included in a website design, it totally freaks me out. Is there no software solution that finds how the settings of one of the monitor is and puts that to the second one? Otherwise what all settings do I need to change manually on the second monitor to make it appear as it does on the laptop? Thanks in advance.

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  • Battery management of a Macbook

    - by darthvader
    I bought a Macbook Pro last week. I mostly use (and plan to use) it like a desktop with an external monitor. I use the system at least 15 hours a day. Now using the coconut battery application, I figured out that the capacity has the current capacity has reduced to 98% of the design capacity. I was wondering what is the best way to manage battery. Should it be always either charging or discharging Should it be plugged in all time. I barely get 2 hours and 30 minutes on battery. Is that normal? I run XCode, VMWare Fusion (for Visual Studio), Mail app, Chrome (5-10 tabs) and Itunes (mp3). The brightness is 60% on battery. I already did the calibration.

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  • Would Microsoft Security Essentials be adequate protection?

    - by Xavierjazz
    Is Microsoft Security Essentials (MSE) adequate protection for my computer? What is the experience with this product? EDIT. On 2009-10-31 I found out about a comparison of AV Suites. MSE did VERY well. EDIT: One that I found interesting was "Raven", who mentioned that AV software has to hook deeply into the OS, and who better to design this than the designer of the OS. EDIT: My personal experience is that I like it, but I also use Malwarebytes and Superantispyware. Each of them sometimes come up with one the others missed or ignored.

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  • Swithing from Windows to Mac OSX - Application recommendations

    - by roosteronacid
    My new Macbook Pro 13" notebook should arrive this monday. And I can't wait! I am a long (looong) time Windows user. And after a good week of researching, I am still somewhat in the dark as far as which applications are "must-haves" on Mac OSX. I would be very greatful if you guys would recommend your favorite applications. I'm looking for recommendations in the following categories... General use applications: File-compression applications, peer-to-peer applications, CD/DVD ripping/burning applications, messaging applications, etc. Web-development applications: Code editors, graphic design applications, and everything in between Must-have-cannot-live-without applications: Things like Growl and other applications that live within Mac OSX's preference panel Virtiualization applications: VMware Fusion, Parallels, etc.

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  • rip in RouterSim

    - by Olga Anastasiadou
    I have to design a network given IPs 146.124.0.0/16 and 146.124.10.0/24. My given requirements are : at least 60 more subnets and maximum 1000 hosts per subnet and use of RIP. I have 3 routers (RA1, RA2, RA3) and 3 subnets (Sales, Logistic and Deposit). I gave WAN1 (RA1-RA3): 146.124.10.0/30, WAN2 (RA2-RA3) : 146.124.10.4/30 and WAN3 (RA1-RA2) : 146.124.10.8/30 and Sales : 146.124.0.0/22, Logistic: 146.124.4.0 and Deposit : 146.124.8.0. When I tried to configure RIP protocol, it didn’t work (I use routerSim 6). What am I doing wrong? Can anyone help please????

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