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  • Create a new instance in a static function of an abstract class

    - by arno
    abstract class db_table { static function get_all_rows() { ... while(...) { $rows[] = new self(); ... } return $rows; } } class user extends db_table { } $rows = user::get_all_rows(); I want to create instances of a class from a static method defined in the abstract parent class but PHP tells me "Fatal error: Cannot instantiate abstract class ..." How should I implement it correctly?

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  • (android) rows of buttons that take up the entire width of the screen

    - by user558043
    I am trying to make 3 rows of 4 buttons each that will take up the entire width of the screen. I have tried Linear Layout but have trouble adding a second row and from what I have read nesting Linear Layouts is bad practice. I tried to use relative layout several times but I cannot manage to get the buttons to fill the width of the screen because it ignores layout_weight, I then tried nesting linear layout in relative layout but layout_weight is still ignored. What is the best way to accomplish this?

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  • Beginner question about getting reference to cin

    - by John C
    I'm having problems wrapping my head around this. I have a function void foo(istream& input) { input = cin; } This fails (I'm assuming because cin isn't supposed to be "copyable". however, this works void foo(istream& input) { istream& baz = cin; } Is there a reason that I can get a reference to cin in baz but I cannot assign it to input? Thanks

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  • How to externalize web.xml servlet init-param? Spring DelegatingFilterProxy for Servlets?

    - by jnorris
    I have a 3rd-party servlet that I cannot modify. It accepts an init-param that I would like to externalize (from web.xml). I can externalize a servlet filter init-param using DelegatingFilterProxy. This effectively moves the servlet filter definition into Spring where there are much more powerful externalization tools (eg: PropertyPlaceholderConfigurer, environment variables, etc.) How can I do this for a servlet?

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  • how can I restrict access to all files in a folder without web.config

    - by netNewbi3
    Hi I need to restric access to my admin folder to certain people. Those with no authentication ticket should be redirectered to a "not allowed page". How do I identify all pages in my admin folder. I have so far but is it OK? If url.Contains("/admin") Then 'If authentication ticket incorrect then `Response.Redirect("~/notallowed_admin.aspx")` End If And not, I cannot use my web.config for this particular issue. Many thanks

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  • How to validate overlapping no in java

    - by anandhinaveen
    I Have dynamically render row. WE have fields like FROM TO. For eg: From TO 2 10, 2 3, 8 12 It cannot accept this combination row.. That means no number should be overlapping. For eg: From TO 2 10, 0 1, 11 12 This combination is allowed.the row may also increased. I need need to write a validation for this overlapping. Can any 1 help to solve this problem.

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  • Reading a stream in C++

    - by Bobby
    I have the following code: ifstream initFile; initFile.open("D:\\InitTLM.csv"); if(initFile.is_open()) { // Process file } The file is not opening. The file does exist on the D: drive. Is there a way to find out exactly why this file cannot be found? Like an "errno"?

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  • Is there a way to stop all javascript on the page?

    - by M28
    I need to stop all the javascript running on the page, but I have a limitation: I cannot control the tags content, I am editing the page after it's being loaded. Also, I need to remove all the variables defined by the old script that was running and stop all the intervals.

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  • UISearchBar disable table view on activation

    - by Sankel
    Hi there. I have a UISearchBar in the table cell. All done in code (not in IB). When the search bar is activated I want to disable the table view are between the search bar and keyboard, so there is no way to touch and navigate out of this view. Cannot really get it working. Help please.

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  • Get random enum from a select group

    - by Coward
    Given a group of about 20 enums that I cannot modify. Im looking for an elegant solution to generate a random enum from a specific sample (ie, 2, 7, 18) I could put these into an arraylist, but thought I would ask if there is something else I could try.

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  • Possible reasons and resolutions for time out

    - by ming yeow
    I cannot SSH into my instance - Operation timed out. What could be the reasons why, and what can I do to resolve it? Rebooting normally takes a long time to take effect, and might just makes things worst UPDATE: It is not about permissions - i can log in normally just fine. I suspect it might be because of memory issues

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  • Track user with log4net for a website

    - by Xstahef
    Hi, I am searching for the best way for track user on a web site based on asp.net. We are using log4net to log some business actions (enter on this page, click on button, etc.). But for multiple users, log file cannot be read easily. So I need add a property 'UserName' on the config file like this : <conversionPattern value="%date [%thread] - %property{UserName} - %-5level - %logger - %message%newline"/> Do you hae any idea about the way to set 'UserName' ? thanks for your help

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  • ETA on Smart Device Projects for Visual Studio 2010

    - by Vaccano
    I really want to upgrade to Visual Studio 2010. But since I do a lot of development for the Pocket PC version of Windows Mobile I cannot. (I develop for a Symbol device that does not support Windows Phone 7, so that is not a option.) Does any one know any kind of time frame of when Microsoft plans to add support for Smart Device Projects into Visual Studio 2010

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  • Invoking static methods containing Generic Parameters using Reflection.

    - by AJP
    While executing the following code i gets this error "Late bound operations cannot be performed on types or methods for which ContainsGenericParameters is true." class Program { static void Main(string[] args) { MethodInfo MI = typeof(MyClass).GetMethod("TestProc"); MI.MakeGenericMethod(new [] {typeof(string)}); MI.Invoke(null, new [] {"Hello"}); } } class MyClass { public static void TestProc<T>(T prefix) { Console.WriteLine("Hello"); } } Please help.

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  • MS Excel connection with vb.net

    - by Noreen
    I have used the connection string below but I am getting an error when trying to create a table Dim ConnString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & strFName + _ ";Extended Properties=""Excel 12.0 Xml;HDR=YES;IMEX=1""" Cannot modify the design of table 'tablename'. It is in a read-only database.

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  • Chrome not displaying Class set by jQuery or a Direct CSS property

    - by user186128
    This might seem like a bit of a design/css question but i really need some help. This is the page http://library.permilia.com/Gavin/version2.0_beta/lead.html It works on every browsers imaginable except chrome. By it works i mean it applies a class .error that sets the borders to 1px solid #f00 which is a red border. In chrome for some reason you cannot change it no matter what! Anybody got any ideas?

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  • Android 2.1 switch loop JRE 1.7

    - by Defuzer
    Hello how to use switch loop in my android project ? I want to use Android 2.1 I need JRE 1.7, but I want to use Android 2.1 I use loop like this: switch ((CHAR[Math.abs(intGen.nextInt()%2)])) { case "+": result = random2 + random3; break; case "-": result = random2 + random3; break; } LogCat: Cannot switch on a value of type String for source level below 1.7. Only convertible int values or enum variables are permitted

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  • What is best practice in converting XML to Java object?

    - by newbie
    I need to convert XML data to Java objects. What would be best practice to convert this XML data to object? Idea is to fetch data via a web service (it doesn't use WSDL, just HTTP GET queries, so I cannot use any framework) and answers are in XML. What would be best practice to handle this situation?

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  • Can I have a set containing identical elements?

    - by Roman
    It is convenient for me to use a set. I like how I can "add" ("remove") an element to (from) the set. It is also convenient to check if a given element is in the set. The only problem, I found out that I cannot add a new element to a set if the set has already such an element. Is it possible to have "sets" which can contain several identical elements.

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