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• Stagger increments in C# NumericUpDown control

  - by mihe

  Hi cloud of wisdom :-) I am facing some trouble trying to configure a particular configuration for a NumericUpDown control in c#. Basically, I have seen that I can set the Increment interval, but I would like to manage the Increment interval depending on which arrow is clicked (up or down). I have checked the events of the control, but I do not find an event for each arrow. Basically, I want to achieve a control where, at different values, the increment is different. from 0.00 to 5.00 increments of 0.01, from 5.00 to 20.00 increments of 0.04, and so on Is this possible ? Note: It would be useful also an historic value in the control for the last value when the valuechanged event is trigger. Does this exist? Thanks in advance for any comment or suggestion!!!

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• Using special characters as keywords in latex listings package

  - by sha

  Hi, I am using the listings package for latex. I am using the SQL language definition and am adding some new keywords that I need, using morekeywords=. I have trouble defining some special characters as keywords, for example, I need [], <, &, and - to be considered as keywords and use the keyword style. I have tried adding these verbatim or with a preceding backslash. It did not work. Your help would be greatly appreciated. Thanks.

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• Why is this postgresql query so slow?

  - by user315975

  I'm no database expert, but I have enough knowledge to get myself into trouble, as is the case here. This query SELECT DISTINCT p.* FROM points p, areas a, contacts c WHERE ( p.latitude > 43.6511659465 AND p.latitude < 43.6711659465 AND p.longitude > -79.4677941889 AND p.longitude < -79.4477941889) AND p.resource_type = 'Contact' AND c.user_id = 6 is extremely slow. The points table has fewer than 2000 records, but it takes about 8 seconds to execute. There are indexes on the latitude and longitude columns. Removing the clause concering the resource_type and user_id make no difference. The latitude and longitude fields are both formatted as number(15,10) -- I need the precision for some calculations. There are many, many other queries in this project where points are compared, but no execution time problems. What's going on?

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• Algorithm for calculating indefinite integrals

  - by mbac32768

  Suppose I have an integral that's bounded on one (or both) ends by (-)infinity. AFAICT, I can't analytically solve this problem, it takes brute force (e.g. using a Left Riemann Sum). I'm having trouble generalizing the algorithm so that it sets the proper subdivisions; I'll either do far too much work to calculate something trivial, or not do nearly enough and have huge aliasing errors. Answering in any language is cool, but maybe someone with better google-fu can end this quickly. :) Is what I'm looking for as impossible as trying to measure the British coastline?

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• PHP Classes: parent/child communication

  - by Fffff

  Hi all, I'm having some trouble extending Classes in PHP. Have been Googling for a while. $a = new A(); $a->one(); $a->b1(); // something like this, or... class A { public $test1; public function one() { echo "this is A-one"; $this->two(); $parent->two(); $parent->B->two(); // ...how do i do something like this (prepare it for using in instance $a)? } } class B extends A { public $test2; public function two($test) { echo "this is B-two"; } } I'm ok at procedural PHP.

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• Rails architecture questions

  - by justinbach

  I'm building a Rails site that, among other things, allows users to build their own recipe repository. Recipes are entered either manually or via a link to another site (think epicurious, cooks.com, etc). I'm writing scripts that will scrape a recipe from these sites given a link from a user, and so far (legal issues notwithstanding) that part isn't giving me any trouble. However, I'm not sure where to put the code that I'm writing for these scraper scripts. My first thought was to put it in the recipes model, but it seems a bit too involved to go there; would a library or a helper be more appropriate? Also, as I mentioned, I'm building several different scrapers for different food websites. It seems to me that the elegant way to do this would be to define an interface (or abstract base class) that determines a set of methods for constructing a recipe object given a link, but I'm not sure what the best approach would be here, either. How might I build out these OO relationships, and where should the code go?

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• For...Next Loop Multiplication Table to Start on 0

  - by nikl91

  I have my For...Next loop with a multiplication table working just fine, but I want the top left box to start at 0 and move on from there. Giving me some trouble. dim mult mult = "" For row = 1 to 50 mult = mult & "" For col= 1 to 20 mult = mult & "" & row * col & "" Next mult = mult & "" Next mult = mult & "" response.write mult This is what I have so far. Any suggestions?

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• For...Next Loop Multiplication Table to Start on 0

  - by nikl91

  I have my For...Next loop with a multiplication table working just fine, but I want the top left box to start at 0 and move on from there. Giving me some trouble. dim mult mult = "<table width = ""100%"" border= ""1"" >" For row = 1 to 50 mult = mult & "<tr align = ""center"" >" For col= 1 to 20 mult = mult & "<td>" & row * col & "</td>" Next mult = mult & "</tr>" Next mult = mult & "</table>" response.write mult This is what I have so far. Any suggestions?

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• Getting a unix timestamp as a string in C++

  - by wyatt

  I'm using the function time() in order to get a timestamp in C++, but, after doing so, I need to convert it to a string. I can't use ctime, as I need the timestamp itself (in its 10 character format). Trouble is, I have no idea what form a time_t variable takes, so I don't know what I'm converting it from. cout handles it, so it must be a string of some description, but I have no idea what. If anyone could help me with this it'd be much appreciated, I'm completely stumped. Alternately, can you provide the output of ctime to a MySQL datetime field and have it interpreted correctly? I'd still appreciate an answer to the first part of my question for understanding's sake, but this would solve my problem.

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• Get countries within range of LAT/LONG coordinates

  - by ptrn

  Trouble! I'm looking for a way to find the countries within a given range of LAT/LONG coordinates. E.g.: When viewing a place in Africa in Google Maps, I get out which countries that are in my current view. This is a bit ambitious, and I think the main problem will be dealing with accuracy of the needed polygons. The accuracy of these don't need to be all that great, the borders can probably be tens of miles off, or even more. This will be needed for the entire world.

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• Django Redundancy

  - by Sunsu

  I've read many things about scaling Django and the new multiple-DB support makes it so much easier. However, I have not been able to find much information on good ways to create a fully redundant system (not just one that scales). I realize there are many things that go into this problem, but the real thing I'm having trouble solving well is Database redundancy. Is it possible to set up a "write slave" using django's new multiple-DB support? If I had IP failover support it seems like having a write slave would help solve the problem. Simple MySQL replication doesn't seem like it will work due to slave lag right? What's the typical method of creating a redundant database system? Any input or guidance you guys have would be greatly appreciated. I realize I could be asking the wrong questions!

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• Mysqli prepared insert statements always returning false

  - by user1754679

  I'm writing prepared statements that are supposed to insert data into a table, on a database that's been pre-selected in the variable $GLOBALS['mysqli']. The connection has been tested, and that's not the problem I'm having. I'm only running into trouble whenever my prepared statement involves INSERT INTO. I know the tablename, and field names are correct, but $stmt is ALWAYS false. What gives? $stmt = $GLOBALS['mysqli']->prepare("INSERT INTO audit_RefreshCount (user, count, lastrefresh) values (?,?,?)"); if ($stmt == TRUE) { $stmt->bindParam('ssi', $_SESSION['username'], '0', time()); //$stmt->bind_Param('ssi', $_SESSION['username'], '0', time()); // Also doesn't work. $stmt->execute(); }

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• how to get apache log like debugging in Android logcat

  - by Nav

  I am currently using a webview to load a webpage which contains lots of javascript and having lots of trouble debugging what exactly gets loaded and when in the webview . Then I saw this post where the op seems to be using apache log to monitor webpage load events in his webview. Enhance webView performance (should be the same performance as native Web Browser) Can I get a similar utility plugin or anything so that I can use it with logcat in ddms view. If possible please provide some resource as to how to configure it for android.

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• How easy would it be to refactor a small JSP/Servlet/JDBC project to SpringMVC/Hibernate

  - by John

  With reference to this post, I am considering starting a new web-based Java project. Since I don't know Spring/Hibernate I was concerned if it's a bad plan to start learning them while creating a new project, especially since it will slow down the early development. One idea I had was to write a prototype using tech I do know, namely JSP/Servlets/JDBC, since I can get this running much quicker with my current knowledge. I could then throw the whole thing away and start over with Spring, etc, but I'd like to consider how easy it would be to refactor a smallish project from JSP/Servlets/JDB to SpringMVC/Hibernate? My DB could of course be re-used but what about other code... would I expect to save most of it plugged into an MVC framework, or is the paradigm shift big enough this would cause more trouble than it avoids? Please use the other question for more general advice on choosing technologies

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• NHibernate: Can I access a generated primary key after saving a model?

  - by littlecharva

  Howdy, So I've got a simple table with an ID field that's incrementally generated on INSERT. I've set the mapping up in NHibernate to reflect this: <id name="ID"> <generator class="identity" /> </id> And it all works fine. Trouble is, I need to get the generated ID after I've saved a new model to use elsewhere: var model = new MyModel(); session.SaveOrUpdate(model); But at this stage model.ID == null, not the ID. Any ideas? Anthony

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• Hibernate / MySQL Bulk insert problem

  - by Marty Pitt

  I'm having trouble getting Hibernate to perform a bulk insert on MySQL. I'm using Hibernate 3.3 and MySQL 5.1 At a high level, this is what's happening: @Transactional public Set<Long> doUpdate(Project project, IRepository externalSource) { List<IEntity> entities = externalSource.loadEntites(); buildEntities(entities, project); persistEntities(project); } public void persistEntities(Project project) { projectDAO.update(project); } This results in n log entries (1 for every row) as follows: Hibernate: insert into ProjectEntity (name, parent_id, path, project_id, state, type) values (?, ?, ?, ?, ?, ?) I'd like to see this get batched, so the update is more performant. It's possible that this routine could result in tens-of-thousands of rows generated, and a db trip per row is a killer. Why isn't this getting batched? (It's my understanding that batch inserts are supposed to be default where appropriate by hibernate).

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• can anyone explain the why the the 1st example gets different results than the following 2

  - by klumsy

  $b = (2,3) $myarray1 = @(,$b,$b) $myarray1[0].length #this will be 1 $myarray1[1].length $myarray2 = @( ,$b ,$b ) $myarray2[0].length #this will be 2 $myarray[1].length $myarray3 = @(,$b ,$b ) $myarray3[0].length #this will be 2 $myarray3[1].length UPDATE I think on #powershell IRC we have worked it out, Here is another example that demonstrates the danger of breaking with the comma on the following line rather than the top line when listing multiple items in an array over multiple lines. $b = (1..20) $a = @( $b, $b ,$b, $b, $b ,$b) for($i=0;$i -lt $a.length;$i++) { $a[$i].length } "--------" $a = @( $b, $b ,$b ,$b, $b ,$b) for($i=0;$i -lt $a.length;$i++) { $a[$i].length } produces 20 20 20 20 20 20 -------- 20 20 20 1 20 20 I'm curious how people will explain this. I think i understand it now, but would have trouble explaining it in a concise understandable fashion, though the above example goes somewhat towards that goal.

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• Secure password transmission over unencrypted tcp/ip

  - by academicRobot

  I'm in the designing stages of a custom tcp/ip protocol for mobile client-server communication. When not required (data is not sensitive), I'd like to avoid using SSL for overhead reasons (both in handshake latency and conserving cycles). My question is, what is the best practices way of transmitting authentication information over an unencrypted connection? Currently, I'm liking SRP or J-PAKE (they generate secure session tokens, are hash/salt friendly, and allow kicking into TLS when necessary), which I believe are both implemented in OpenSSL. However, I am a bit wary since I don't see many people using these algorithms for this purpose. Would also appreciate pointers to any materials discussing this topic in general, since I had trouble finding any.

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• I don't see any stacktrace running webapp with JBoss

  - by anna

  hi everyone. I have some very annoying trouble with jboss. I'm developing simple web-app using richfaces and I'm facing the problem that when I deploy and run application in browser jboss shows just following message: This page contains the following errors: error on line 12 at column 16: internal error Below is a rendering of the page up to the first error. And that's all. No stacktrace! It's so uneasy to search for a source of problem. Could anyone help me to "turn on" stacktracing?

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• Can't run the ActionBarCompat sample

  - by David Miler

  I am having trouble compiling and running the ActionBarCompat sample of Android 16. I have API level 16 as the build target selected, which seems to build fine, but when I try to debug these errors pop up. Of course I could change the min API level in the manifest, but what would be the point of that? I have made no changes to the sample, so how come it is not working properly? Class requires API level 14 (current min is 3): android.view.ActionProvider SimpleMenuItem.java /ActionBarCompat/src/com/example/android/actionbarcompat line 129 Android Lint Problem Class requires API level 14 (current min is 3): android.view.ActionProvider SimpleMenuItem.java /ActionBarCompat/src/com/example/android/actionbarcompat line 134 Android Lint Problem Class requires API level 14 (current min is 3): android.view.MenuItem.OnActionExpandListener SimpleMenuItem.java /ActionBarCompat/src/com/example/android/actionbarcompat line 155 Android Lint Problem I am thoroughly confused, any help would be appreciated.

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• How to get rid of this sliver of white between DIVs?

  - by George Edison

  I am currently having trouble getting rid of a sliver of white... Here is an example page: http://m.stackoverflow.quickmediasolutions.com/view_question.php?id=97969&site=serverfault As you can see, the answers have a sliver of white stuffed between the top of the 'button' and the content. Here is some relevant code: <!-- this is the top of the 'button' --> <div class='top'></div> <!-- right here is where the space is --> <div class='content'></div> .top { height: 5px; } .content { display: block; padding-left: 10px; }

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• Upload image with Tumblr API in PHP

  - by John

  I'm having trouble uploading a photo from my computer to tumblr using their API. http://www.tumblr.com/docs/en/api photo - Requires either source or data, but not both. If both are specified, source is used. * source - The URL of the photo to copy. This must be a web-accessible URL, not a local file or intranet location. * data - An image file. See File uploads below. * caption (optional, HTML allowed) * click-through-url (optional) I need to use data File uploads can be done in a data parameter where specified above. You may use either of the common encoding methods: multipart/form-data method, like a file upload box in a web form. Maximum size: o 50 MB for videos o 10 MB for photos o 10 MB for audio I would post my code but it's not showing up correctly for me.

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• How Can I Join Two DB Tables and Return Lowest Price From Joined Table

  - by Jason

  I have two tables, the first table has the product and the second table the prices. The price table could have more than one price per product but I only want to display the lowest. But I keep getting all the prices returned and I'm having trouble figuring out how to do it. this is what I get returned in my query: SELECT * FROM products AS pr JOIN prices AS p ON pr.id = p.product_id WHERE pr.live = 1 AND p.live = 1 id product1 name description £100 id product1 name description £300 id product1 name description £200 id product2 name description £50 id product2 name description £80 id product2 name description £60 id product3 name description £222 id product3 name description £234 id product3 name description £235 but I'm after: id product1 name description £100 id product2 name description £50 id product3 name description £222 Any help would be appreciated

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• CakePHP Routing Alias, no prefix

  - by Jason McCreary

  I have a dashboard with a series of widgets. Per specification, the widgets need to be buried under a /widgets/ directory. So I have added the following to my routes.php Router::connect('/widget/:controller/:action/*', array()); But I seem to be running into trouble on widgets/links/ and widgets/links/view/1 I am new to CakePHP, but this doesn't seem all that impressive. I have yet to find anything in the Book or by search. So any help is appreciated. Thanks.

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• How do I return a variable from $.post() in jQuery? Closure variable?

  - by James Bao

  I am having trouble passing data retrieved from a $.post() function to use in other places in my code. I want to save the data as a variable and use it outside of the post() function. This is my code: var last_update = function() { $.post('/--/feed', {func:'latest', who:$.defaults.login}, function($j){ _j = JSON.parse($j); alert(_j.text); // This one works }); } alert(_j.text); // This one doesn't }; last_update(); //run the function Please help!

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