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  • web server and database server distance

    - by Erkan
    I want to seperate my server into two parts: web server and dbserver. My web server is located in Turkey and my dbserver is located in Germany. I cant change my web server because my agreement is based on my Ip adresses. I want to locate my dbserver in Germany because more cheap then Turkey. But... I have a problem in here. When you call a db action, first, you are going to Turkey for IIS and IIS is going to Germany for Dbserver. It is too far and so slow to response back. Any idea? Is it wrong that the distance is so far between web server and dbserver? Or Are there any solutions for this problem?

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  • What makes Java so suitable for writing NoSQL Databases

    - by good_computer
    Looking at this page that aggregates the current NoSQL landscape, one can see that the majority of these projects are written in Java. Databases are complex systems software dealing with the file system, and so C/C++ would be a better choice than Java for this. (that's my thinking which might be flawed) Secondly, databases deal with transferring large amounts of data from disk to RAM -- which they call a working set. The JVM takes non-trivial amount of RAM for it's own purpose -- so it would be more efficient to use a platform that leaves lots of memory for data instead of hogging it for its own operations. The major relational databases are ALL written in C/C++ MySQL C, C++ Oracle Assembler, C, C++ SQL Server C++ PostgreSQL C SQLite C So what makes Java so popular in NoSQL world.

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  • Good choice of languages for making a program that manages and organizes business? [closed]

    - by Ronney P
    I've been reading questions and discussions on this website but haven't made an account to start talking or asking anything I had doubts in so please bare with a newbie here. What are specific languages that have are able to make a program that will record, and organize things such as hours, salaries, payments? Also solve business problems, mostly with payments, how much money there will be after interest, taxes and such. Anyway, I've been looking into COBOL, C++, Java, HTML, JavaScript, VB.NET and a couple more. Which ones should I focus on and look into more? I very much appreciate any answers. Thank you.

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  • Learning MySQL Query optimization

    - by recluze
    I've been doing web/desktop/server development for a while and have worked with many databases (mysql mostly). I've come to the point in my career when I need to have someone look at my queries because they're 'kind of slow'. I believe it's now time to start learning query optimization. While I know the basics of index and joins etc., I'm not familiar with how to use, say, the EXPLAIN output to improve performance of my queries. I have not been able to find any online material that starts with the basics and takes me to application. Getting a book is not an option right now so I'm looking for tips about how to proceed with this. I hope this question is general enough not to get closed.

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  • Is it good practice to keep 2 related tables (using auto_increment PK) to have the same Max of auto_increment ID when table1 got modified?

    - by Tum
    This question is about good design practice in programming. Let see this example, we have 2 interrelated tables: Table1 textID - text 1 - love.. 2 - men... ... Table2 rID - textID 1 - 1 2 - 2 ... Note: In Table1: textID is auto_increment primary key In Table2: rID is auto_increment primary key & textID is foreign key The relationship is that 1 rID will have 1 and only 1 textID but 1 textID can have a few rID. So, when table1 got modification then table2 should be updated accordingly. Ok, here is a fictitious example. You build a very complicated system. When you modify 1 record in table1, you need to keep track of the related record in table2. To keep track, you can do like this: Option 1: When you modify a record in table1, you will try to modify a related record in table 2. This could be quite hard in term of programming expecially for a very very complicated system. Option 2: instead of modifying a related record in table2, you decided to delete old record in table 2 & insert new one. This is easier for you to program. For example, suppose you are using option2, then when you modify record 1,2,3,....,100 in table1, the table2 will look like this: Table2 rID - textID 101 - 1 102 - 2 ... 200 - 100 This means the Max of auto_increment IDs in table1 is still the same (100) but the Max of auto_increment IDs in table2 already reached 200. what if the user modify many times? if they do then the table2 may run out of records? we can use BigInt but that make the app run slower? Note: If you spend time to program to modify records in table2 when table1 got modified then it will be very hard & thus it will be error prone. But if you just clear the old record & insert new records into table2 then it is much easy to program & thus your program is simpler & less error prone. So, is it good practice to keep 2 related tables (using auto_increment PK) to have the same Max of auto_increment ID when table1 got modified?

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  • How To return md5 salted hash? [closed]

    - by user1790627
    Here is the function and this function returns value for sessionGuid. Example, User1 login and join chat then the value of User1 for sessionGuid is. 1 User2 value for sessionGuid is. 2 User3 . value .3 i want this function return md5 salted hash to avoid hacks. function get_current_online_session_login() { $oSrvSec = &App::getModuleService('Account', 'Security'); $login = $oSrvSec->getCurrentUserLogin(); $aReq = getRow(App::getT('online_session'), 'online_session_user = "' . $login . '"'); // return $aReq['online_session_login']; return $aReq['online_session_id']; }

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  • Oracle 11g R2 1???????~????????(Exadata??)?????

    - by Yusuke.Yamamoto
    ??2010?11?17???Oracle Database 11g Release2(R2) ???????1???? ????Oracle Database 11g R2 ?????????????????????????? ???? 2010/11/17:????? 2011/01/07:???????(Exadata/??) 2011/01/18:???????(Exadata/?????????????) 2011/02/22:???????(Exadata/?????:IT Leaders ????????) 2011/04/21:?????? 2011/04/21:???????(????????????) 2011/04/21:???????(Exadata/???????????????????????????????????) 2011/06/27:Oracle Exadata Database Machine ????1,000??? ?? Oracle Database 11g R2 ??????? Oracle Database 11g ?????????(????) ??????? Oracle Database 11g R2(???/????) Oracle Database 11g R2 ??????? ?? ??? 2009?11?11? Oracle Exadata Database Machine Version 2 ???? 2009?11?17? Oracle Database 11g R2 ???? 2010?02?01? ?????????????????????????????? 2010?03?31? SAP ? Oracle Database 11g R2 ??????????ISV????????·??????????? 2010?05?18? Windows Server 2008 R2 / Windows 7 ?????????Oracle Database 10g R2 ??? 2010?06?23? Oracle Application Express 4.0 ???? 2010?07?09? ?? Windows RDBMS ?????(2009?)????????? 2010?08?17? TPC-C Benchmark Price/Performance ???????? 2010?09?13? Patch Set 11.2.0.2 for Linux ????(??) 2010?10?20? Oracle Exadata Database Machine X2 ???? 2010?11?17? Oracle Database 11g R2 ????1?? 2010?11?19? ?? Windows RDBMS ?????(2010????)????????????? 2011?03?29? Oracle SQL Developer 3.0 ???? 2011?06?27? Oracle Exadata Database Machine ????1,000????????????????·?????????????? Oracle Database 11g ?????????(????) ????????????????????????????????(????)? ????(??????????) ??????????(???) ????? ????(???) ?????·???????·??? ????? ????·??????·?? ???? ???????(??????????????)|???99.999%???????500???????????? - ITpro ??????????? ????(????) ???(???) ????????(???) ??????(???????????) Oracle Exadata Database Machine ????? Oracle Database 11g ??(????)? ??????????????????????????????????? ????(??????) ????????????? ?????·???????·??? ??(??????????????) ?????(??????????) ?????????(????????) ?????????? ????(???????) ?????? ????/????·???????? ???????????(???????/NTT??????????) ????????????? ???? ???????????? ?????? ??? ?????|DWH?????????????? - IT Leaders(????????)|DWH?????????????? - IT Leaders ????(???????????) Customer Voice ????:????IT?????24??365????????????????????? ?Oracle9i Database ?????????????????????Oracle Database 11g ???????????????????????? Oracle9i Database ???????????????? Customer Voice ??????:Oracle Database 11g????????????????????? ?Oracle ASM ???????????????????I/O????????????????????????????????????? ??????? Oracle Database 11g R2(???/????) ???????????????? Oracle 11g R2 ????????? - IT Leaders ??????????11g R2?5???? - ??SE????Oracle??? - Think IT ????????????????????????~Oracle Database 11g Release2 ????????? - oracletech.jp ??????????? Oracle Database 11g Release 2(11gR2)|??????????? ???????|???????????

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  • Oracle Days ???????????????????????????!!

    - by OTN-J Master
    ???????????????????????2????Oracle Days 2012 Tokyo??????????????? Oracle Days???????????????????Oracle OpenWorld 2012???·???????????????????????????????????????????????????OpenWorld?????????????????????????????????????????????????????????????????????????????????????(10/24??)??????????????????????????????????????·????????????????????????????????????????????????????? -------------------------------------------10?30?(?)???????????????D1-E-1?13:00-13:45 (1) ??????·????????D1-E-2?14:00-14:45(2) Oracle Real Application Clusters?D1-E-3? 15:00-15:45 (3) ????????/???????D1-E-4? 16:00-16:45 (4) ????-------------------------------------------??????????????????????????????????????????????????????????????????????????????????????????? >>  ??????????(??????????????????) >> ???????????????????!

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  • ???·20??!?? ??????????!??????????????????

    - by OTN-J Master
    2011??1??????????????????????????????????????????????????20?????????????????????1????????????????????????20?????????????????????????????????????????????????????????????????!??????????????????????????????????????????????? 20????????????????????????????--------------------------------------------------------------------------???1?????????????????20?????????????? ????????????????????????????? ????????????????????????????????????? ??????(?????????????????????????? ???????????????????????)? ???????????????Oracle???????????????????? ?????????????????????????????????????? ??????????????????????????????????????? ??????????????????????????????????? ?????????????????? ????--------------------------------------------------------------------------??????????????????????????????????????????????????(1??????????)???????????????????????? ?1? ????????????????? ?2? RAC(Real Application Clusters)???????????? ?3? Statspack????????????????????? ?4? ???????FAQ:???????????????? ?5? ???????????????????????? ?6? ??????????????????? ?7? ????????? ?8? ??????? ?9? ??SQL???? ?10? ??????????? ?11? ??SQL????(2????? ?12? I/O?????? ?13? ??????????? ?14? ???·?????????? ?15? ????????? ?16? ?????????? ?17? ?????????? ?18? ??????? ?19??UNDO????REDO??????? ?20????????????? ??????????OTN Newsletter?OTN Twitter???????????????????????????????????????????????????????????????????????????????????????????????OTN??????????????????????????????????????????????????”???????????”?????????????????URL?????????? (????????????????????????????????????)???????????????????

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  • ???????/??????????!? ????????

    - by Yusuke.Yamamoto
    ????? ??:2010/12/21 ??:??????/?? ?????????????·???????????????????????????????????????????????????????????????????????????1???????????????! ???????????????/ ???·?????:E-R?/???????/ ????????????????????·????????? ????????? ????????????????? http://otndnld.oracle.co.jp/ondemand/otn-seminar/movie/DBDesign_02241730.wmv http://www.oracle.com/technology/global/jp/ondemand/otn-seminar/pdf/DBdesign.pdf

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  • ????????????????????????&?????????????!

    - by OTN-J Master
    ??????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????!!??????????????????????????????????????????????????????????????    ?????????????!DBA??? ?11? ?????????????? ~????????????????~ ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????DBA???????????????????????????????????????????DBA????????????????????????????????????????????????????????????????????????????? >> ?????????????? ??     ???????????????22? ????????????(2)? ??????????????????????????????????? ??????????????????????????????????????????????????????????10???????????????????????????????????????????OTN Webmaster?????: ????????????????????????????????????(?????????????????)???????????????????????(*^^*)>> ??????????? ??

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  • javamail error :must issue starttls command first

    - by bobby
    im trying to send a mail using javamail api using the below code:when i compiled the class file im getting the below error which says 'must issue starttls command first' i have mentioned the error below. and also getProvider() function error i think so...i dont know what the errors mean. import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import javax.mail.*; import javax.mail.internet.*; import javax.mail.event.*; import javax.mail.Authenticator; import java.net.*; import java.util.Properties; public class mailexample { public static void main (String args[]) throws Exception { String from = args[0]; String to = args[1]; try { Properties props=new Properties(); props.put("mail.transport.protocol", "smtp"); props.put("mail.smtp.host","smtp.gmail.com"); props.put("mail.smtp.port", "25"); props.put("mail.smtp.auth", "true"); javax.mail.Authenticator authenticator = new javax.mail.Authenticator() { protected javax.mail.PasswordAuthentication getPasswordAuthentication() { return new javax.mail.PasswordAuthentication("[email protected]", "pass"); } }; Session sess=Session.getDefaultInstance(props,authenticator); sess.setDebug (true); Transport transport =sess.getTransport ("smtp"); Message msg=new MimeMessage(sess); msg.setFrom(new InternetAddress(from)); msg.addRecipient(Message.RecipientType.TO, new InternetAddress(to)); msg.setSubject("Hello JavaMail"); msg.setText("Welcome to JavaMail"); transport.connect(); transport.send(msg); } catch(Exception e) { System.out.println("err"+e); } } } error: C:\Users\bobby\Desktopjava mailexample [email protected] abc@gmail. com DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.s mtp.SMTPTransport,Sun Microsystems, Inc] DEBUG SMTP: useEhlo true, useAuth true DEBUG SMTP: useEhlo true, useAuth true DEBUG: SMTPTransport trying to connect to host "smtp.gmail.com", port 25 DEBUG SMTP RCVD: 220 mx.google.com ESMTP q10sm12956046rvp.20 DEBUG: SMTPTransport connected to host "smtp.gmail.com", port: 25 DEBUG SMTP SENT: EHLO bobby-PC DEBUG SMTP RCVD: 250-mx.google.com at your service, [60.243.184.29] 250-SIZE 35651584 250-8BITMIME 250-STARTTLS 250 ENHANCEDSTATUSCODES DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.s mtp.SMTPTransport,Sun Microsystems, Inc] DEBUG SMTP: useEhlo true, useAuth true DEBUG SMTP: useEhlo true, useAuth true DEBUG: SMTPTransport trying to connect to host "smtp.gmail.com", port 25 DEBUG SMTP RCVD: 220 mx.google.com ESMTP l29sm12930755rvb.16 DEBUG: SMTPTransport connected to host "smtp.gmail.com", port: 25 DEBUG SMTP SENT: EHLO bobby-PC DEBUG SMTP RCVD: 250-mx.google.com at your service, [60.243.184.29] 250-SIZE 35651584 250-8BITMIME 250-STARTTLS 250 ENHANCEDSTATUSCODES DEBUG SMTP SENT: MAIL FROM: DEBUG SMTP RCVD: 530 5.7.0 Must issue a STARTTLS command first. l29sm12930755rvb .16 DEBUG SMTP SENT: QUIT errjavax.mail.SendFailedException: Sending failed; nested exception is: javax.mail.MessagingException: 530 5.7.0 Must issue a STARTTLS command f irst. l29sm12930755rvb.16

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  • wpf window refresh works at first, then stops

    - by mcl
    I've got a routine that grabs a list of all images in a directory, then runs an MD5 digest on all of them. Since this takes a while to do, I pop up a window with a progress bar. The progress bar is updated by a lambda that I pass in to the long-running routine. The first problem was that the progress window was never updated (which is normal in WPF I guess). Since WPF lacks a Refresh() command I fixed this with a call to Dispatcher.Invoke(). Now the progress bar is updated for a while, then the window stops being updated. The long-running work does eventually finish and the windows go back to normal. I have already tried a BackgroundWorker and quickly became frustrated by a threading issue related to an event triggered by the long-running process. So if that's really the best solution and I just need to learn the paradigm better, please say so. But I'd be really much happier with the approach I've got here, except that it stops updating after a bit (for example, in a folder with 1000 files, it might update for 50-100 files, then "hang"). The UI does not need to be responsive during this activity, except to report on progress. Anyway, here's the code. First the progress window itself: public partial class ProgressWindow : Window { public ProgressWindow(string title, string supertext, string subtext) { InitializeComponent(); this.Title = title; this.SuperText.Text = supertext; this.SubText.Text = subtext; } internal void UpdateProgress(int count, int total) { this.ProgressBar.Maximum = Convert.ToDouble(total); this.ProgressBar.Value = Convert.ToDouble(count); this.SubText.Text = String.Format("{0} of {1} finished", count, total); this.Dispatcher.Invoke(DispatcherPriority.Render, EmptyDelegate); } private static Action EmptyDelegate = delegate() { }; } <Window x:Class="Pixort.ProgressWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Pixort Progress" Height="128" Width="256" WindowStartupLocation="CenterOwner" WindowStyle="SingleBorderWindow" ResizeMode="NoResize"> <DockPanel> <TextBlock DockPanel.Dock="Top" x:Name="SuperText" TextAlignment="Left" Padding="6"></TextBlock> <TextBlock DockPanel.Dock="Bottom" x:Name="SubText" TextAlignment="Right" Padding="6"></TextBlock> <ProgressBar x:Name="ProgressBar" Height="24" Margin="6"/> </DockPanel> </Window> The long running method (in Gallery.cs): public void ImportFolder(string folderPath, Action<int, int> progressUpdate) { string[] files = this.FileIO.GetFiles(folderPath); for (int i = 0; i < files.Length; i++) { // do stuff with the file if (null != progressUpdate) { progressUpdate.Invoke(i + 1, files.Length); } } } Which is called thusly: ProgressWindow progress = new ProgressWindow("Import Folder Progress", String.Format("Importing {0}", folder), String.Empty); progress.Show(); this.Gallery.ImportFolder(folder, ((c, t) => progress.UpdateProgress(c, t))); progress.Close();

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  • zLib on iPhone, stop at first BLOCK

    - by cedric
    I am trying to call iPhone zLib to decompress the zlib stream from our HTTP based server, but the code always stop after finishing the first zlib block. Obviously, iPhone SDK is using the standard open Zlib. My doubt is that the parameter for inflateInit2 is not appropriate here. I spent lots of time reading the zlib manual, but it isn't that helpful. Here is the details, your help is appreciated. (1) the HTTP request: NSURL *url = [NSURL URLWithString:@"http://192.168.0.98:82/WIC?query=getcontacts&PIN=12345678&compression=Y"]; (2) The data I get from server is something like this (if decompressed). The stream was compressed by C# zlib class DeflateStream: $REC_TYPE=SYS Status=OK Message=OK SetID= IsLast=Y StartIndex=0 LastIndex=6 EOR ...... $REC_TYPE=CONTACTSDISTLIST ID=2 Name=CTU+L%2EA%2E OnCallEnabled=Y OnCallMinUsers=1 OnCallEditRight= OnCallEditDLRight=D Fields= CL= OnCallStatus= EOR (3) However, I will only get the first Block. The code for decompression on iPhone (copied from a code piece from somewhere here) is as follow. The loop between Line 23~38 always break the second time execution. + (NSData *) uncompress: (NSData*) data { 1 if ([data length] == 0) return nil; 2 NSInteger length = [data length]; 3 unsigned full_length = length; 4 unsigned half_length =length/ 2; 5 NSMutableData *decompressed = [NSMutableData dataWithLength: 5*full_length + half_length]; 6 BOOL done = NO; 7 int status; 8 z_stream strm; 9 length=length-4; 10 void* bytes= malloc(length); 11 NSRange range; 12 range.location=4; 13 range.length=length; 14 [data getBytes: bytes range: range]; 15 strm.next_in = bytes; 16 strm.avail_in = length; 17 strm.total_out = 0; 18 strm.zalloc = Z_NULL; 19 strm.zfree = Z_NULL; 20 strm.data_type= Z_BINARY; 21 // if (inflateInit(&strm) != Z_OK) return nil; 22 if (inflateInit2(&strm, (-15)) != Z_OK) return nil; //It won't work if change -15 to positive numbers. 23 while (!done) 24 { 25 // Make sure we have enough room and reset the lengths. 26 if (strm.total_out >= [decompressed length]) 27 [decompressed increaseLengthBy: half_length]; 28 strm.next_out = [decompressed mutableBytes] + strm.total_out; 29 strm.avail_out = [decompressed length] - strm.total_out; 30 31 // Inflate another chunk. 32 status = inflate (&strm, Z_SYNC_FLUSH); //Z_SYNC_FLUSH-->Z_BLOCK, won't work either 33 if (status == Z_STREAM_END){ 34 35 done = YES; 36 } 37 else if (status != Z_OK) break; 38 } 39 if (inflateEnd (&strm) != Z_OK) return nil; 40 // Set real length. 41 if (done) 42 { 43 [decompressed setLength: strm.total_out]; 44 return [NSData dataWithData: decompressed]; 45 } 46 else return nil; 47 }

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  • How do you unit test a unit test?

    - by FlySwat
    I was watching Rob Connerys webcasts on the MVCStoreFront App, and I noticed he was unit testing even the most mundane things, things like: public Decimal DiscountPrice { get { return this.Price - this.Discount; } } Would have a test like: [TestMethod] public void Test_DiscountPrice { Product p = new Product(); p.Price = 100; p.Discount = 20; Assert.IsEqual(p.DiscountPrice,80); } While, I am all for unit testing, I sometimes wonder if this form of test first development is really beneficial, for example, in a real process, you have 3-4 layers above your code (Business Request, Requirements Document, Architecture Document), where the actual defined business rule (Discount Price is Price - Discount) could be misdefined. If that's the situation, your unit test means nothing to you. Additionally, your unit test is another point of failure: [TestMethod] public void Test_DiscountPrice { Product p = new Product(); p.Price = 100; p.Discount = 20; Assert.IsEqual(p.DiscountPrice,90); } Now the test is flawed. Obviously in a simple test, it's no big deal, but say we were testing a complicated business rule. What do we gain here? Fast forward two years into the application's life, when maintenance developers are maintaining it. Now the business changes its rule, and the test breaks again, some rookie developer then fixes the test incorrectly...we now have another point of failure. All I see is more possible points of failure, with no real beneficial return, if the discount price is wrong, the test team will still find the issue, how did unit testing save any work? What am I missing here? Please teach me to love TDD, as I'm having a hard time accepting it as useful so far. I want too, because I want to stay progressive, but it just doesn't make sense to me. EDIT: A couple people keep mentioned that testing helps enforce the spec. It has been my experience that the spec has been wrong as well, more often than not, but maybe I'm doomed to work in an organization where the specs are written by people who shouldn't be writing specs.

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  • Adding active class in menu only works on first page

    - by rileychuggins
    I have nav links that become active once they come into the window. I need to implement this on three separate pages on my website but the following scripts only work for the first page. var services_refresh = function () { // do stuff console.log('Stopped Scrolling'); if($('#ct_scans.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#ct_scans"]').addClass('active'); } else if($('#xray.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#xray"]').addClass('active'); } else if($('#fluoroscopy.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#fluoroscopy"]').addClass('active'); } else if($('#mri.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#mri"]').addClass('active'); } else if($('#neuroimaging.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#neuroimaging"]').addClass('active'); } else if($('#nuclear_medicine.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#nuclear_medicine"]').addClass('active'); } else if($('#ultrasound.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#ultrasound"]').addClass('active'); } else if($('#mammography.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#mammography"]').addClass('active'); } else if($('#breast_ultrasound.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#breast_ultrasound"]').addClass('active'); } else if($('#breast_biopsy.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#breast_biopsy"]').addClass('active'); } else if($('#breast_mri.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#breast_mri"]').addClass('active'); } else if($('#osteoporosis.anchor').visible()) { $('#our_services_sub_sections li a').removeClass('active'); $('#our_services_sub_sections li a[href="#osteoporosis"]').addClass('active'); } }; Here is my HTML for the first page that works: <ul id="our_services_sub_sections" class="diagnostic_images"> <li><a class="scroll active" href="#ct_scans">CT Scans</a></li> <li><a class="scroll" href="#xray">X-Ray</a></li> <li><a class="scroll" href="#fluoroscopy">Fluoroscopy</a></li> <li><a class="scroll" href="#mri">MRI</a></li> <li><a class="scroll" href="#neuroimaging">Neuroimaging</a></li> <li><a class="scroll" href="#nuclear_medicine">Nuclear Medicine</a></li> <li><a class="scroll" href="#ultrasound">Ultrasound</a></li> </ul> Here is my HTML for the second page which does not work: <ul id="our_services_sub_sections" class="womens_imaging"> <li><a class="scroll active" href="#mammography">Mammography</a></li> <li><a class="scroll" href="#breast_ultrasound">Breast Ultrasound</a></li> <li><a class="scroll" href="#breast_biopsy">Breast Biopsy</a></li> <li><a class="scroll" href="#breast_mri">Breast MRI</a></li> <li><a class="scroll osteo" href="#osteoporosis">Osteoporosis<br />Evaluation (DEXA)</a></li> </ul> Why is this not working?

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  • has_one and has_many associations: which side of the association is saved first

    - by SeeBees
    I have three simplified models: class Team < ActiveRecord::Base has_many :players has_one :coach end class Player < ActiveRecord::Base belongs_to :team validates_presence_of :team_id end class Coach < ActiveRecord::Base belongs_to :team validates_presence_of :team_id end I use the following code to test these models: t = Team.new team.coach = Coach.new team.save! team.save! returns true. But in another test: t = Team.new team.players << Player.new team.save! team.save! gives the following error: > ActiveRecord::RecordInvalid: > Validation failed: Players is invalid > from > /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/validations.rb:1090:in > `save_without_dirty!' from > /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/dirty.rb:87:in `save_without_transactions!' from > /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/transactions.rb:200:in > `save!' from > /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in > `transaction' from > /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/transactions.rb:182:in > `transaction' from > /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/transactions.rb:200:in > `save!' from > /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/transactions.rb:208:in > `rollback_active_record_state!' from > /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/transactions.rb:200:in > `save!' from (irb):14 I figured out when team.save! is called, it first calls player.save!. player needs to validate the presence of the id of the associated team. But at the time player.save! is called, team hasn't been saved yet, and therefore, team_id doesn't yet exist for player. This fails the player's validation, so the error occurs. But on the other hand, team is saved before coach.save!, otherwise the first example will get the same error as the second. So I've concluded that when a has_many bs, a.save! will save bs prior to a. When a has_one b, a.save! will save a prior to b. If I am right, why is this the case? It doesn't seem logical to me. Why has_one and has_many association have different order in saving? Any ideas? Thanks.

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  • User Getting Logged Out After Making First Comment

    - by John
    Hello, I am using a login system that works well. I am also using a comment system. The comment function does not show up unless the user is logged in (as shown in commentformonoff.php below). When a user makes a comment, the info is passed from the function "show_commentbox" to the file comments2a.php. Then, the info is passed to the file comments2.php. When the site is first pulled up on a browser, after logging in and making a comment, the user is logged out. After logging in a second time during the same browser session, the user is no longer logged out after making a comment. How can I keep the user logged in after making the first comment? Thanks in advance, John Commentformonoff.php: <?php if (!isLoggedIn()) { if (isset($_POST['cmdlogin'])) { if (checkLogin($_POST['username'], $_POST['password'])) { show_commentbox($submissionid, $submission, $url, $submittor, $submissiondate, $countcomments, $dispurl); } else { echo "<div class='logintocomment'>Login to comment</div>"; } } else { echo "<div class='logintocomment'>Login to comment</div>"; } } else { show_commentbox($submissionid, $submission, $url, $submittor, $submissiondate, $countcomments, $dispurl); } ?> Function "show_commentbox": function show_commentbox($submissionid, $submission, $url, $submittor, $submissiondate, $countcomments, $dispurl) { echo '<form action="http://www...com/.../comments/comments2a.php" method="post"> <input type="hidden" value="'.$_SESSION['loginid'].'" name="uid"> <input type="hidden" value="'.$_SESSION['username'].'" name="u"> <input type="hidden" value="'.$submissionid.'" name="submissionid"> <input type="hidden" value="'.stripslashes($submission).'" name="submission"> <input type="hidden" value="'.$url.'" name="url"> <input type="hidden" value="'.$submittor.'" name="submittor"> <input type="hidden" value="'.$submissiondate.'" name="submissiondate"> <input type="hidden" value="'.$countcomments.'" name="countcomments"> <input type="hidden" value="'.$dispurl.'" name="dispurl"> <label class="addacomment" for="title">Add a comment:</label> <textarea class="checkMax" name="comment" type="comment" id="comment" maxlength="1000"></textarea> <div class="commentsubbutton"><input name="submit" type="submit" value="Submit"></div> </form> '; } Included in comments2a.php: $uid = mysql_real_escape_string($_POST['uid']); $u = mysql_real_escape_string($_POST['u']); $query = sprintf("INSERT INTO comment VALUES (NULL, %d, %d, '%s', NULL)", $uid, $subid, $comment); mysql_query($query) or die(mysql_error()); $lastcommentid = mysql_insert_id(); header("Location: comments2.php?submission=".$submission."&submissionid=".$submissionid."&url=".$url."&submissiondate=".$submissiondate."&comment=".$comment."&subid=".$subid."&uid=".$uid."&u=".$u."&submittor=".$submittor."&countcomments=".$countcomments."&dispurl=".$dispurl."#comment-$lastcommentid"); exit(); Included in comments2.php: if($_SERVER['REQUEST_METHOD'] == "POST"){header('Location: http://www...com/.../comments/comments2.php?submission='.$submission.'&submissionid='.$submissionid.'&url='.$url.'&submissiondate='.$submissiondate.'&submittor='.$submittor.'&countcomments='.$countcomments.'&dispurl='.$dispurl.'');} $uid = mysql_real_escape_string($_GET['uid']); $u = mysql_real_escape_string($_GET['u']);

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  • Maze not being random.

    - by Matt Habel
    Hey there, I am building a program that generates a maze so I can later translate the path to my graphical part. I have most of it working, however, every time you can just take the east and south routes, and you'll get to the end. Even if I set the width as high as 64, so the maze is 64*64, I'm able to choose those 2 options and get to the end every time. I really don't understand why it is doing that. The code is below, it's fairly easy to understand. import random width = 8 def check(x,y): """Figures out the directions that Gen can move while""" if x-1 == -1: maze[x][y][3] = 0 if x+1 == width + 1: maze[x][y][1] = 0 if y+1 == width + 1: maze[x][y][2] = 0 if y-1 == -1: maze[x][y][0] = 0 if x + 1 in range(0,width) and visited[x+1][y] == False: maze[x][y][1] = 2 if x - 1 in range(0,width) and visited[x-1][y] == False: maze[x][y][3] = 2 if y + 1 in range(0,width) and visited[x][y+1] == False: maze[x][y][2] = 2 if y - 1 in range(0,width) and visited[x][y-1] == False: maze[x][y][0] = 2 def possibleDirs(x,y): """Figures out the ways that the person can move in each square""" dirs = [] walls = maze[x][y] if walls[0] == 1: dirs.append('n') if walls[1] == 1: dirs.append('e') if walls[2] == 1: dirs.append('s') if walls[3] == 1: dirs.append('w') return dirs def Gen(x,y): """Generates the maze using a depth-first search and recursive backtracking.""" visited[x][y] = True dirs = [] check(x,y) if maze[x][y][0] == 2: dirs.append(0) if maze[x][y][1] == 2: dirs.append(1) if maze[x][y][2] == 2: dirs.append(2) if maze[x][y][3] == 2: dirs.append(3) print dirs if len(dirs): #Randonly selects a derection for the current square to move past.append(current[:]) pos = random.choice(dirs) maze[x][y][pos] = 1 if pos == 0: current[1] -= 1 maze[x][y-1][2] = 1 if pos == 1: current[0] += 1 maze[x+1][y][3] = 1 if pos == 2: current[1] += 1 maze[x][y+1][0] = 1 if pos == 3: current[0] -= 1 maze[x-1][y][1] = 1 else: #If there's nowhere to go, go back one square lastPlace = past.pop() current[0] = lastPlace[0] current[1] = lastPlace[1] #Build the initial values for the maze to be replaced later maze = [] visited = [] past = [] #Generate empty 2d list with a value for each of the xy coordinates for i in range(0,width): maze.append([]) for q in range(0, width): maze[i].append([]) for n in range(0, 4): maze[i][q].append(4) #Makes a list of falses for all the non visited places for x in range(0, width): visited.append([]) for y in range(0, width): visited[x].append(False) dirs = [] print dirs current = [0,0] #Generates the maze so every single square has been filled. I'm not sure how this works, as it is possible to only go south and east to get to the final position. while current != [width-1, width-1]: Gen(current[0], current[1]) #Getting the ways the person can move in each square for i in range(0,width): dirs.append([]) for n in range(0,width): dirs[i].append([]) dirs[i][n] = possibleDirs(i,n) print dirs print visited pos = [0,0] #The user input part of the maze while pos != [width - 1, width - 1]: dirs = [] print pos if maze[pos[0]][pos[1]][0] == 1: dirs.append('n') if maze[pos[0]][pos[1]][1] == 1: dirs.append('e') if maze[pos[0]][pos[1]][2] == 1: dirs.append('s') if maze[pos[0]][pos[1]][3] == 1: dirs.append('w') print dirs path = raw_input("What direction do you want to go: ") if path not in dirs: print "You can't go that way!" continue elif path.lower() == 'n': pos[1] -= 1 elif path.lower() == 'e': pos[0] += 1 elif path.lower() == 's': pos[1] += 1 elif path.lower() == 'w': pos[0] -= 1 print"Good job!" As you can see, I think the problem is at the point where I generate the maze, however, when I just have it go until the current point is at the end, it doesn't fill every maze and is usually just one straight path. Thanks for helping. Update: I have changed the for loop that generates the maze to a simple while loop and it seems to work much better. It seems that when the for loop ran, it didn't go recursively, however, in the while loop it's perfectly fine. However, now all the squares do not fill out.

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  • Explicit method tables in C# instead of OO - good? bad?

    - by FunctorSalad
    Hi! I hope the title doesn't sound too subjective; I absolutely do not mean to start a debate on OO in general. I'd merely like to discuss the basic pros and cons for different ways of solving the following sort of problem. Let's take this minimal example: you want to express an abstract datatype T with functions that may take T as input, output, or both: f1 : Takes a T, returns an int f2 : Takes a string, returns a T f3 : Takes a T and a double, returns another T I'd like to avoid downcasting and any other dynamic typing. I'd also like to avoid mutation whenever possible. 1: Abstract-class-based attempt abstract class T { abstract int f1(); // We can't have abstract constructors, so the best we can do, as I see it, is: abstract void f2(string s); // The convention would be that you'd replace calls to the original f2 by invocation of the nullary constructor of the implementing type, followed by invocation of f2. f2 would need to have side-effects to be of any use. // f3 is a problem too: abstract T f3(double d); // This doesn't express that the return value is of the *same* type as the object whose method is invoked; it just expresses that the return value is *some* T. } 2: Parametric polymorphism and an auxilliary class (all implementing classes of TImpl will be singleton classes): abstract class TImpl<T> { abstract int f1(T t); abstract T f2(string s); abstract T f3(T t, double d); } We no longer express that some concrete type actually implements our original spec -- an implementation is simply a type Foo for which we happen to have an instance of TImpl. This doesn't seem to be a problem: If you want a function that works on arbitrary implementations, you just do something like: // Say we want to return a Bar given an arbitrary implementation of our abstract type Bar bar<T>(TImpl<T> ti, T t); At this point, one might as well skip inheritance and singletons altogether and use a 3 First-class function table class /* or struct, even */ TDictT<T> { readonly Func<T,int> f1; readonly Func<string,T> f2; readonly Func<T,double,T> f3; TDict( ... ) { this.f1 = f1; this.f2 = f2; this.f3 = f3; } } Bar bar<T>(TDict<T> td; T t); Though I don't see much practical difference between #2 and #3. Example Implementation class MyT { /* raw data structure goes here; this class needn't have any methods */ } // It doesn't matter where we put the following; could be a static method of MyT, or some static class collecting dictionaries static readonly TDict<MyT> MyTDict = new TDict<MyT>( (t) => /* body of f1 goes here */ , // f2 (s) => /* body of f2 goes here */, // f3 (t,d) => /* body of f3 goes here */ ); Thoughts? #3 is unidiomatic, but it seems rather safe and clean. One question is whether there are any performance concerns with it. I don't usually need dynamic dispatch, and I'd prefer if these function bodies get statically inlined in places where the concrete implementing type is known statically. Is #2 better in that regard?

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  • Unable to attach "AdventureWorks2008" Sample Database to a named Instance in SQL Server 2008

    - by uzorick
    First of all "Northwind" and "AdventureWorksDW2008" databases attached without problem, but "AdventureWorks2008" fails with the following error. // Msg 5120, Level 16, State 105, Line 1 Unable to open the physical file "C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\Documents". Operating system error 2: "2(The system cannot find the file specified.)". Msg 5105, Level 16, State 14, Line 1 A file activation error occurred. The physical file name 'C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\Documents' may be incorrect. Diagnose and correct additional errors, and retry the operation. Msg 1813, Level 16, State 2, Line 1 Could not open new database 'AdventureWorks2008'. CREATE DATABASE is aborted. // PS: I did not use the default database instance "MSSQLSERVER" during install, so Where is it finding this path "C:...\MSSQL10.MSSQLSERVER...\Documents"?

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  • Mongo Map Reduce first time

    - by James
    Hello guys, First time Map/Reduce user here, and using MongoDB. I have a lot of page visit data which I'd like to make some sense of by using Map/Reduce. Below is basically what I want to do, but as a total beginner a Map/Reduce, I think this is above my knowledge! Find all visits to current page where external = true within the last 30 days (unix timestamp, I deal with the date ranges in PHP and then the array, not mongo date) Group all visits by referral location For each referral location, calculate how many then went to visit a page which has a certain word in the [tags]. I'm using the normal Mongo PHP extension if that has an impact.

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  • PHP File Upload second file does not upload, first file does without error

    - by Curtis
    So I have a script I have been using and it generally works well with multiple files... When I upload a very large file in a multiple file upload, only the first file is uploaded. I am not seeing an errors as to why. I figure this is related to a timeout setting but can not figure it out - Any ideas? I have foloowing set in my htaccess file php_value post_max_size 1024M php_value upload_max_filesize 1024M php_value memory_limit 600M php_value output_buffering on php_value max_execution_time 259200 php_value max_input_time 259200 php_value session.cookie_lifetime 0 php_value session.gc_maxlifetime 259200 php_value default_socket_timeout 259200

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  • java.sql.SQLException: SQL logic error or missing database

    - by Sunil Kumar Sahoo
    Hi All, I ahve created database connection with SQLite using JDBC in java. My sql statements execute properly. But sometimes I get the following error while i use conn.commit() java.sql.SQLException: SQL logic error or missing database Can anyone please help me how to avoid this type of problem. Can anyone give me better approach of calling JDBC programs Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:/home/Data/database.db3"); conn.setAutoCommit(false); String query = "Update Chits set BlockedForChit = 0 where ServerChitID = '" + serverChitId + "' AND ChitGatewayID = '" + chitGatewayId + "'"; Statement stmt = null; try { stmt.execute(query); conn.commit(); stmt.close(); stmt = null; } Thanks Sunil Kumar Sahoo

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  • java.sql.SQLException: SQL logic error or missing database, SQLite, JDBC

    - by Sunil Kumar Sahoo
    Hi All, I ahve created database connection with SQLite using JDBC in java. My sql statements execute properly. But sometimes I get the following error while i use conn.commit() java.sql.SQLException: SQL logic error or missing database Can anyone please help me how to avoid this type of problem. Can anyone give me better approach of calling JDBC programs Class.forName("org.sqlite.JDBC"); conn = DriverManager.getConnection("jdbc:sqlite:/home/Data/database.db3"); conn.setAutoCommit(false); String query = "Update Chits set BlockedForChit = 0 where ServerChitID = '" + serverChitId + "' AND ChitGatewayID = '" + chitGatewayId + "'"; Statement stmt = conn.createStatement(); try { stmt.execute(query); conn.commit(); stmt.close(); stmt = null; } Thanks Sunil Kumar Sahoo

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