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  • Using regular expressions

    - by Tom
    What is wrong with this regexp? I need it to make $name to be letter-number only. Now it doens't seem to work at all. if (!preg_match("/^[A-Za-z0-9]$/",$name)) { $e[]="name must contain only letters or numbers"; }

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  • My first Lisp macro; is it leaky?

    - by Tom Martin
    I've been working through Practical Common Lisp and as an exercise decided to write a macro to determine if a number is a multiple of another number: (defmacro multp (value factor) `(= (rem ,value ,factor) 0)) so that : (multp 40 10) evaluates to true whilst (multp 40 13) does not The question is does this macro leak in some way? Also is this "good" Lisp? Is there already an existing function/macro that I could have used?

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  • How do I serialize/deserialize a NHibernate entity that has references to other objects?

    - by Daniel T.
    I have two NHibernate-managed entities that have a bi-directional one-to-many relationship: public class Storage { public virtual string Name { get; set; } public virtual IList<Box> Boxes { get; set; } } public class Box { public virtual string Box { get; set; } [DoNotSerialize] public virtual Storage ParentStorage { get; set; } } A Storage can contain many Boxes, and a Box always belongs in a Storage. I want to edit a Box's name, so I send it to the client using JSON. Note that I don't serialize ParentStorage because I'm not changing which storage it's in. The client edits the name and sends the Box back as JSON. The server deserializes it back into a Box entity. Problem is, the ParentStorage property is null. When I try to save the Box to the database, it updates the name, but also removes the relationship to the Storage. How do I properly serialize and deserialize an entity like a Box, while keeping the JSON data size to a minimum?

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  • Web GUI for editing INI files

    - by Tom
    I am looking for a Unix based application or framework that would allow me to view/edit ini files on a remote system in a Html GUI via Apache (or similar). Searching for ini/config/GUI solutions via search engines returns a lot a false positives. Any recommendations?

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  • Why's a simple change to rt.jar causing the Java Runtime Environment to crash silently?

    - by Tom
    This is what I'm doing: extract contents of my JRE's rt.jar extract src.zip of my JDK (same version) Now, if I copy Runtime.java from the extracted src folder and compile it using javac.exe without any modifications and then put it in the extracted rt folder to finally put everything back in a jar file using jar.exe, everything works as expected. The JRE runs fine. However, if I make the slightest change to Runtime.java and compile it and put it in rt.jar, the JRE crashes whenever I attempt to start it. This is an example of a slight change that causes the silent crash: /** Don't let anyone else instantiate this class */ private Runtime() { System.out.println("This is a test."); } Instead of: /** Don't let anyone else instantiate this class */ private Runtime() {} Could anyone tell me why this is causing my JRE to crash? Thanks in advance.

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  • How do I track a branch of another repository on the same machine?

    - by Daniel Stutzbach
    I have two private repositories on one machine. Let's call them repo-A and repo-B, which are the directories ~/repo-A and ~/repo-B, respectively. repo-A has two relevant branches: master and live. I'd like to set up repo-B to track repo-A's live branch, so that git pull will pull any updates from repo-A's live branch into repo-B's master branch. Right now, I have the following in repo-B's .git/config: [remote "origin"] url = /home/stutzbach/repo-A/ fetch = +refs/heads/live:refs/remotes/origin/live [branch "master"] remote = origin merge = refs/heads/master However, when I run git pull, it seems to pull from repo-A's master branch. Obviously, I don't have it set up right. What's the right way?

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  • PHP: Over-writing session variables

    - by Tom
    Hi, Question related to PHP memory-handling from someone not yet very experienced in PHP: If I set a PHP session variable of a particular name, and then set a session variable of the exact same name elsewhere (during the same session), is the original variable over-written, or does junk accumulate in the session? In other words, should I be destroying a previous session variable before creating a new one of the same name? Thank you.

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  • Link Labels c# - displaying a list of them

    - by tom
    I am trying to add a list of linked lables to a listview. I amd doing so like this foreach (String s in values) { LinkLabel label = new LinkLabel(); label.Text = s; txtBox.Controls.Add(label); } } It keeps adding just one item to the listbox even tho there are more. Any ideas? ps) i can tell there are more items from adding a breakbpoint and using console.writeline when iterating Thanks

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  • Is DOM not being loaded ?

    - by Daniel
    I went through episode 88 (Dynamic menus) of the railscasts and when I try to load my *js.erb file in the browser shows me that my fetched data from the controller is getting there Controller def dynamic_departments @departments = Department.all end localhost:3000/javascripts/dynamic_departments.js var departments = new Array(); departments.push(new Array(1,'????',1)); departments.push(new Array(2,'???-???',2)); function facultySelected(){ faculty_id = $('falculty_id').getValue(); options = $('department_id').options; options.length = 1; departments.each(function(department){ if(department[0] == faculty_id){ options[options.length] = new Option(department[1],department[2]) } }); if(options.length == 1){ $('department_field').hide(); } else { $('department_field').show(); } } document.observe('dom:loaded', function(){ alert("DOM loaded"); //$('department_field').hide(); //$('faculty_id').observe('change',facultySelected); }); My routes.rb has the match ':controller/:action.:format' Still...after the page's loaded and I change the value of my collection_select or select nothing happens.What am I missing? *I called the 'alert' and commented the rest to test it....still nothing.

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  • Glassfish: Storing Java classes in the docroot folder?

    - by Tom Marthenal
    I'm very new to using Glassfish or JSP. I have this working in NetBeans (which has Glassfish bundled) but when I try to put it on my server which is running Glassfish Server, I really don't know what I'm doing. I can place a JSP file in "domains/domain1/docroot/index.jsp" and it will work when I visit my site, but I can't, for some reason, get Java classes to work. I copied the files in "/build/web/" from the NetBeans project to the docroot folder on my server. The errors I get when I visit the site are: org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP PWC6199: Generated servlet error: string:///index_jsp.java:7: package test does not exist PWC6197: An error occurred at line: 5 in the jsp file: /index.jsp PWC6199: Generated servlet error: string:///index_jsp.java:52: cannot find symbol symbol : class TestClass location: class org.apache.jsp.index_jsp PWC6197: An error occurred at line: 5 in the jsp file: /index.jsp PWC6199: Generated servlet error: string:///index_jsp.java:52: cannot find symbol symbol : class TestClass location: class org.apache.jsp.index_jsp The actual Java class is in "WEB-INF/classes/test/TestClass.class" (it is pre-compiled). I really have no idea what I'm doing wrong so any help is greatly appreciated. Thanks!

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  • Build server polling vs. event-driven builds

    - by Daniel T.
    Why do build servers poll for changes instead of SVN firing off an event (or a post-commit step) that tells the build server to start a build? It seems terribly inefficient to poll for changes, especially when the number of projects increases and the polling period is set to a very low value (for example, 30 seconds).

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  • Can you safely rely upon Yahoo Pipes to offload ETL for your application?

    - by Daniel DiPaolo
    Yahoo Pipes are a very intriguing choice for sort of a poor-man's server-free ETL solution, but would it be a good idea to build an application around one or many Pipes? I've really only used them for toy things here and there, with the only thing I've used longer than a week or two being one amalgamated and filtered RSS feed that I've plugged into Google Reader (which has worked great, but if it goes out for a while I wouldn't notice). So, my question is, would building an application around Yahoo Pipes be reliable (available most of the time)? Ideally it'd be something I could rely on being up 99+% of the time. It looks like the Pipes Terms of Use permit building apps around it, but I am unfamiliar with anyone building anything significant using them.

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  • The State of RDF in Ruby

    - by Daniel
    I'm wondering about the current support there is in Ruby for semantic web technologies. Is there good RDF options? It seems that the last surveys done were circa 2007 ( http://paul-classic.stadig.name/2007/10/26/the-state-of-rdf-support-in-ruby-2007/ ). Is Redland's RDF wrappers the best way to go for RDF support - all the other projects mentioned in that aging article seem to be unsupported or dropped. Is Ruby perhaps a bad choice if one which to pursue projects pertaining to the semantic web?

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  • Creating "GDP in 1960" variable from GDP variables for different years

    - by Tom Smith
    Hi all, I'm pretty new to stata... I have a set of observations of the form "Country GDP Year". I want to create a new variable GDP1960, which gives the GDP in 1960 of each country for each year: USA $100m 1960 USA $100m 1960 $100m USA $200m 1965 --> USA $200m 1965 $100m Canada $60m 1960 Canada $60m 1960 $60m What's the right syntax to make this happen? (I assume egen is involved in some mysterious way)

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  • Fixing "Lock wait timeout exceeded; try restarting transaction" for a 'stuck" Mysql table?

    - by Tom
    From a script I sent a query like this thousands of times to my local database: update some_table set some_column = some_value I forgot to add the where part, so the same column was set to the same a value for all the rows in the table and this was done thousands of times and the column was indexed, so the corresponding index was probably updated too lots of times. I noticed something was wrong, because it took too long, so I killed the script. I even rebooted my computer since them, but something stuck in the table, because simple queries take a very long time to run and when I try dropping the relevant index it fails with this message: Lock wait timeout exceeded; try restarting transaction It's an innodb table, so stuck the transaction is probably implicit. How can I fix this table and remove the stuck transaction from it?

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  • Prroblem with ObjectDelete() in Entity Framework 4

    - by Tom
    I got two entities: public class User : Entity { public virtual string Username { get; set; } public virtual string Email { get; set; } public virtual string PasswordHash { get; set; } public virtual List<Photo> Photos { get; set; } } and public class Photo : Entity { public virtual string FileName { get; set; } public virtual string Thumbnail { get; set; } public virtual string Description { get; set; } public virtual int UserId { get; set; } public virtual User User { get; set; } } When I try to delete the photo it works fine for the DB (record gets romoved from the table) but it doesnt for the Photos collection in the User entity (I can still see that photo in user.Photos). This is my code. What I'm doing wrong here? Changing entity properties works fine. When I change photo FileName for example it gets updated in DB and in user.Photos. var photo = SelectById(id); Context.DeleteObject(photo); Context.SaveChanges(); var user = GetUser(userName); // the photo I have just deleted is still in user.Photos also tried this but getting same results: var photo = user.Photos.First(); Context.DeleteObject(photo); Context.SaveChanges();

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  • Generalised XML Serialization

    - by Tom W
    I apologise for asking a question that's probably been asked hundreds of times before, but I don't seem to be able to find an answer in the archives; probably because my question is too basic. I know that XML Serialization by default only touches public members and properties. Properties very often mask a private variable; particularly if they're readonly. Serializing these is fine; the value that the instance exposes to the world is what goes into the XML. But if Deserialization of the same data can't put the value back where it belongs, what's the point of doing it? Is there something I'm missing about how XML Serialization is normally used for classes with masking properties? Surely it can't be that the only answer is explicitly implementing Read/WriteXML - because that's more effort than it's worth!

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  • Powerpoint 2003, change picture

    - by Tom Gullen
    I have a picture in Powerpoint 2003, how do I change the picture without having to delete it and re-add it? I need to save all the animations and it's going to take about 5 hours to re add them, but only like 20 mins if I change the pictures. Or if there is anyway to copy a custom animation set to another picture that would also be ace

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  • How can I make one Maven module depend on another?

    - by Daniel Pryden
    OK, I thought I understood how to use Maven... I have a master project M which has sub-projects A, B, and C. C contains some common functionality (interfaces mainly) which is needed by A and B. I can run mvn compile jar:jar from the project root directory (the M directory) and get JAR files A.jar, B.jar, and C.jar. (The versions for all these artifacts are currently 2.0-SNAPSHOT.) The master pom.xml file in the M directory lists C under its <dependencyManagement> tag, so that A and B can reference C by just including a reference, like so: <dependency> <groupId>my.project</groupId> <artifactId>C</artifactId> </dependency> So far, so good. I can run mvn compile from the command line and everything works fine. But when I open the project in NetBeans, it complains with the problem: "Some dependency artifacts are not in the local repository", and it says the missing artifact is C. Likewise from the command line, if I change into the A or B directories and try to run mvn compile I get "Build Error: Failed to resolve artifact." I expect I could manually go to where my C.jar was built and run mvn install:install-file, but I'd rather find a solution that enables me to just work directly in NetBeans (and/or in Eclipse using m2eclipse). What am I doing wrong?

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