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• Add a custom jquery validation method not connected to a field

  - by Johan Wikström

  Normally all validation methods is connected to a field, radiobuttons, dropdowns etc. In my case I would like to do a general custom validation that depends on many fields in my form. I dont want one field of them to become highlighted like a normal "required", i would rather just show a message in the errorcontainer. Is there a simple way to do this I have overlooked?

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• Using Joins vs Entity associations

  - by shivesh

  I am learning Entity framework and linq-to-entities. It's possible to get cross values from multiple tables using JOINS (join keyword) or using the navigation fields ( associations) in which case the framework knows how to reference the cross data. My question is what to use when?

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• Extending struts 2 "property" data tag

  - by John B.

  Hi, We are currently developing a project with Struts2. We have a module on which we display a large amount of data on read-only fields from a group of beans via the "property" Struts 2 data tag (i.e. <s:property value="aBeanProperty" /) on a jsp file. In some cases most of the fields might come empty, so a blank is being displayed on screen. Our customer is now requesting us to display default string (i.e. "N/A") whenever a property comes empty, so that it is displayed in place of the blank spaces currently shown. We are looking for a way to achieve this in a clean and maintainable way. The 'property' tag comes with a 'default' attribute on which one can define a default value in cases when the accessed property comes as null. However, most of our properties are empty strings, therefore it does not work in our case. Another solution we are thinking of is to define a base class for all of our beans, and define a util method which will validate if a string is null or empty and then return the default value. Then we would call this method from each bean getter. And yes this would be tiresome and kind of ugly :), therefore we are holding out on this one in case of a better solution. Now, we have in mind a solution which we think would be the best but have not had luck on how implement it. We are planning on extending the 'property' tag some way, defining a new 'default' attribute so that besides working on null properties, it also do so on empty strings ("", " ", etc). Therefore we would only need to replace the original s:property tag with our new custom tag, and the desired result would be achieved without touching java code. Do you have an idea on how to do this? Also, any other clever solution (maybe some sort of design pattern?) on how to default the values of a large amount of property beans are welcome too! (Or maybe, even there might be some tag that does this already in Struts2??) Thanks in advance.

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• [java] run 2 threads simultaneously

  - by lamsaitat

  hi all, in the case of an IM client. i have made 2 separate threads to handle sending packets (by std io) and receiving packets. the question is how to make these 2 threads run simultaneously so that i can keep prompting for input while at the same time be ready to receive packets at any time? i have already tried setting a timer but the data is always lost receiving.

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• IE8 disappearing image bug

  - by Joe Fletcher

  In IE8 (& maybe others), when I leave my page to go to another tab in IE and then come back to my page's tab, each time the cursor runs over an image it disappears until I refresh the page. I've heard of disappearing image bugs, but I couldn't find anything on this particular case, especially given this isn't a weird pre-IE8 bug. I am using a lightbox, so possibly something to do with javascript? http://dev.bwmsnow.co.nz/snowboarding

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• Convert tax like IRS function to SQL

  - by CrashRoX

  Trying to convert this tax-like IRS function http://stackoverflow.com/questions/1817920/calculating-revenue-share-at-different-tiers to SQL. The assumption is the table would be one column (price) and the tiers will be added dynamically. My first attempt has some case statements that didn't work out well. I have since scrapped it :) Thanks for the help!

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• Initialize an object in java

  - by harigm

  Is it the right Way we initialise the the object? I have a class Sample I want to initialise the Object in my Sample1 Class After intialisation I dont require to use the object of Sample Class. In that Case Can I initialise that object as new Sample(); instead of Sample s = new Sample(); if I am not going to use s anywhere in my Sample1 Class My question, is this a good practice to do that? will there be any after affects

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• Does any language use "=/=" for denoting the not-equal operator

  - by Mustafa

  Does any programming language use =/= for not-equal? Are there any lexical difficulties for scanners to recognize such an operator? Or was it the case historically? [Note: this is NOT a homework question. I'm just curious.]

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• SQL Server Query with "ELSE:"

  - by Mike D

  I have various VB6 projects I'm maintaining with some of the queries being passed to the server having "ELSE:" with the colon used in case statements. I'm wondering can someone tell me what the **ll the colon is used for? It causes errors in SQL2005 and greater, but SQL2000 works with no complaints. I'd like to just remove it from the code & re-compile, but I'm afraid it'll break 10 other things in the application.. Thanks in advance...

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• Howto capture all control creation and destruction in .NET forms based application

  - by s_rajasekar

  I have a use case where any text box created in the application should be handled and some events should be listened to. I checked the ControlCollection, it does not seem to have a "created" or "modified" events. Also MessageFilter could not receive any create, or destroy events. Is this an optimal way to receive messages or windows hook will be the only alternative?

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• How to avoid accidental deletions of databases in Lotus Notes?

  - by Saili

  I have always worried about users deleting lotus notes databases by accident. We had one such case last week and I want to know how we can lock the databases so that users cannot delete them. Is there a way in Lotus Notes - either at the Db level or server level where we can set up the database so that only the administer of the db or the user with Manager access can delete the database? Thanks!

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• How to set a dynamic width on a floating div?

  - by user330144

  I have a div container with 3 div elements inside (A, B, and C). I'll know the width of the container and the width of A and B) the problem is that in some cases B won't be there in which case I need C to expand to fill the rest of the container. How would I do this with straight css or am I going to need to use javascript to calculate the width? Thanks.

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• Reduce Triangle in DirectX 9

  - by Himadri

  Hello everyone, I have a 3D object with about 2000 or 3000 triangles. I want to reduce the number of triangle without affecting shape of object. for eg, I have two triangles, (1,1.5,2) (1.5,1.5,2) (1.7,2,2) (1.5,1.5,2) (1.7,2,2) (2,1.5,2) In this case these two triangle is same as a single triangle - (1,1.5,2) (2,1.5,2) (1.7,2,2) I dont want the manual method, But if there is any direct function or such thing which will reduce my triangle list. Thank You.

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• When to use a HashTable

  - by ammed

  In C# I find myself using a List, IList or IEnumerable 99% of the time. Is there a case when t would be better to use a HashTable (or Dictionary in 2.0 and above) over these?

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• What is the difference between tinyint, mediumint, bingint and int in sql?

  - by Sein Kraft

  What is the difference between tinyint, mediumint, bingint and int in sql? In which case are used?

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• Is there a way to test if a Function/Sub is available in VB6?

  - by Clay Nichols

  We have a few Subs (like a WriteErrorToLog and some AutomatedTesting) that I'd like to make optional in case we want to reuse a component. I'd like to be able to do something like if AddressOf( Sub) is valid then execute Sub.

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• XNA: What is the point of Unload()?

  - by Rosarch

  XNA games have an Unload() method, where content is supposed to be unloaded. But what is the point of this? If all the content is being unloaded, then the game must be exiting, in which case everything would be garbage collected anyway, right?

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• Local development using HTML5 storage

  - by jasongonzales

  I am experimenting with HTML5 local storage functionality, but was frustrated to learn that the browser won't allow local storage when the file is local. My guess is that the browser (Chrome in my case, FF too) wants to see a domain rather than a file location. Has anyone here discovered a workaround for developing locally? Perhaps setting up a local domain? That sounds like too much trouble. There should just be a developer option in the browser, grrrrrr.

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• a bugging query

  - by Sachindra

  i need to get a query where the elements are displayed in case the first letter is E (the word is electronics).. i have tried with the following : mysql_query("select * from nested_category where name like '[A-F]%'");

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• How do you get the width of an element without a defined width?

  - by Moak

  How would you find out the width of a element that is wrapped by 20 odd other elements, but the only fixed width I know is the main wrapper's which is 800px. All child elements are generally blocks, floating or not, with different paddings and margins. I don't really need the answer to a specific case, I'm just wondering if there are tools or tricks to quickly calculate such things. Thanks

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• Difference between private, public and protected inheritance in C++

  - by Shikiyo

  i looked in SO and couldn't find a good description regarding the difference between public, private and protected C++ inheritance. All the questions were assuming an specific case.

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• Why is $b "b" in this logic?

  - by user275074

  I'd have expected $b to be 'a' but it is 'b', why is this the case? $a = "b"; $b = "a";

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• Why Java does not allow overriding equals(Object) in an Enum?

  - by Ashwin Prabhu

  @Override public boolean equals( Object otherObject ) is not allowed in Java for an Enum, since the method equals(Object x) is defined as final in Enum. Why is this so? I cannot thing of any use case which would require overriding equals(Object) for Enum. I'm just curious to know the reasoning behind this behavior.

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• This code works fine in Chrome, Firefox but not in IE.

  - by Jeddizero

  Hi, I'm trying to make a jquery tooltip that appears when a user mouses over a link. In my case the link is using display:block style so that it covers a large area. It works perfectly in Chrome and Firefox but in Internet Explorer it doesn't work at all. The tooltip doesn't show, the browsers own tooltip shows etc... IE!!!! http://pastebin.com/1kBaMujV Any ideas? Got to love internet explorer...

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• Why do I need the isset() function in php?

  - by Chris

  I am trying to understand the difference between this: if (isset($_POST['Submit'])) { //do something } and if ($_POST['Submit']) { //do something } It seems to me that if the $_POST['Submit'] variable is true, then it is set. Why would I need the isset() function in this case?

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