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  • Select column value that matches a combination of other columns values on the same table

    - by Ala
    I have a table called Ads and another Table called AdDetails to store the details of each Ad in a Property / Value style, Here is a simplified example with dummy code: [AdDetailID], [AdID], [PropertyName], [PropertyValue] 2 28 Color Red 3 28 Speed 100 4 27 Color Red 5 28 Fuel Petrol 6 27 Speed 70 How to select Ads that matches many combinations of PropertyName and PropertyValue, for example : where PropertyName='Color' and PropertyValue='Red' And where PropertyName='Speed' and CAST(PropertyValue AS INT) > 60

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  • Virtual member call in a constructor when assigning value to property

    - by comecme
    I have an Abstract class and a Derived class. The abstract class defines an abstract property named Message. In the derived class, the property is implemented by overriding the abstract property. The constructor of the derived class takes a string argument and assigns it to its Message property. In Resharper, this assignment leads to a warning "Virtual member call in constructor". The AbstractClass has this definition: public abstract class AbstractClass { public abstract string Message { get; set; } protected AbstractClass() { } public abstract void PrintMessage(); } And the DerivedClass is as follows: using System; public class DerivedClass : AbstractClass { private string _message; public override string Message { get { return _message; } set { _message = value; } } public DerivedClass(string message) { Message = message; // Warning: Virtual member call in a constructor } public DerivedClass() : this("Default DerivedClass message") {} public override void PrintMessage() { Console.WriteLine("DerivedClass PrintMessage(): " + Message); } } I did find some other questions about this warning, but in those situations there is an actual call to a method. For instance, in this question, the answer by Matt Howels contains some sample code. I'll repeat it here for easy reference. class Parent { public Parent() { DoSomething(); } protected virtual void DoSomething() {}; } class Child : Parent { private string foo; public Child() { foo = "HELLO"; } protected override void DoSomething() { Console.WriteLine(foo.ToLower()); } } Matt doesn't describe on what error the warning would appear, but I'm assuming it will be on the call to DoSomething in the Parent constructor. In this example, I understand what is meant by a virtual member being called. The member call occurs in the base class, in which only a virtual method exists. In my situation however, I don't see why assigning a value to Message would be calling a virtual member. Both the call to and the implementation of the Message property are defined in the derived class. Although I can get rid of the error by making my Derived Class sealed, I would like to understand why this situation is resulting in the warning.

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  • How to cast an NSDecimal value into an NSInteger value?

    - by mystify
    I have an situation where I get an NSDecimal, and I need an NSInteger. I do know it is a very small value (this is absolutely sure). It won't be bigger than 100. So It would be perfectly fine to cast it to NSInteger, no overflow would happen. How could this be done? There's just an -doubleValue method in NSDecimal.

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  • I cannot get the value of a table view cell in cocoa

    - by Michael Amici
    I am trying to get the value of a cell in a table view but it won't let me. If someone could help that would be great. int numberOfChecks = -1; numberOfChecks = numberOfChecks +1; if ([objectsForTable count]-1 >= numberOfChecks) { UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:numberOfChecks]; NSString *cellTitle = cell.textLabel.text; }

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  • Get the index value of an array in php

    - by Aakash Chakravarthy
    Hello, I have array $list = array('string1', 'string2', 'string3'); Now i want to get the index of the value string2 i.e 1 and 2 for string3 All i want is the position of the strings in the array string1 in 0 string2 in 1 string3 in 2 positions How to get this ? i used array_search but it is no use ! please help !

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  • Bean Value Updation problem in jsf1.1

    - by johnbritto
    Hey I have One Jsf form that contains 2 Beans . First Bean scope: Session Second Bean scope: request When somevalues are added via First Bean to second Bean. The Updation value is not displayed in the form.I dont know how to do.Please help me.

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  • default value in web service wsdl in asp.net

    - by nrk
    Hi, I created on wcf web service and trying to test with SOAP UI. When testing with soap ui for example creating an employee, if I send soap request xml with <empId>0</empId> works fine. <empId></empId> **throwing exception.** if i completly remove <empId> tag it works fine.... Is there any way to make default value as "0" in wsdl in WCF? Thanks nRk

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  • Scanned value(using scanner) in the textbox

    - by Geetha
    Hi All, I am using Scanner(basic model) to scan the barcode. Scanned barcode will be captured in a textbox. In txtBarcode_TextChanged event i am getting the barcode to access. Problem: If i clicked the scanner more than once, the barcode gets append with the previous value. Code: protected void txtBarcode_TextChanged(object sender, EventArgs e) { string txt = this.txtBarcode.Text; this.txtBarcode.Text = string.Empty; }

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  • node.js callback getting unexpected value for variable

    - by defrex
    I have a for loop, and inside it a variable is assigned with var. Also inside the loop a method is called which requires a callback. Inside the callback function I'm using the variable from the loop. I would expect that it's value, inside the callback function, would be the same as it was outside the callback during that iteration of the loop. However, it always seems to be the value from the last iteration of the loop. Am I misunderstanding scope in JavaScript, or is there something else wrong? The program in question here is a node.js app that will monitor a working directory for changes and restart the server when it finds one. I'll include all of the code for the curious, but the important bit is the parse_file_list function. var posix = require('posix'); var sys = require('sys'); var server; var child_js_file = process.ARGV[2]; var current_dir = __filename.split('/'); current_dir = current_dir.slice(0, current_dir.length-1).join('/'); var start_server = function(){ server = process.createChildProcess('node', [child_js_file]); server.addListener("output", function(data){sys.puts(data);}); }; var restart_server = function(){ sys.puts('change discovered, restarting server'); server.close(); start_server(); }; var parse_file_list = function(dir, files){ for (var i=0;i<files.length;i++){ var file = dir+'/'+files[i]; sys.puts('file assigned: '+file); posix.stat(file).addCallback(function(stats){ sys.puts('stats returned: '+file); if (stats.isDirectory()) posix.readdir(file).addCallback(function(files){ parse_file_list(file, files); }); else if (stats.isFile()) process.watchFile(file, restart_server); }); } }; posix.readdir(current_dir).addCallback(function(files){ parse_file_list(current_dir, files); }); start_server(); The output from this is: file assigned: /home/defrex/code/node/ejs.js file assigned: /home/defrex/code/node/templates file assigned: /home/defrex/code/node/web file assigned: /home/defrex/code/node/server.js file assigned: /home/defrex/code/node/settings.js file assigned: /home/defrex/code/node/apps file assigned: /home/defrex/code/node/dev_server.js file assigned: /home/defrex/code/node/main_urls.js stats returned: /home/defrex/code/node/main_urls.js stats returned: /home/defrex/code/node/main_urls.js stats returned: /home/defrex/code/node/main_urls.js stats returned: /home/defrex/code/node/main_urls.js stats returned: /home/defrex/code/node/main_urls.js stats returned: /home/defrex/code/node/main_urls.js stats returned: /home/defrex/code/node/main_urls.js stats returned: /home/defrex/code/node/main_urls.js For those from the future: node.devserver.js

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  • Default value for public attributes

    - by Danny Chen
    I have a public attribute in some class. I want a default value -1 for this attribute without an private variable like _MyAttr(because too many attributes, i won't add them one by one). public int MyAttr { get; set; } [DefaultValueAttribute] is not working for this issue i think. Any ideas? Thanks.

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  • how to save byte[] value to varbinary(64) field on database

    - by shamim
    byte[] a = HashEncript("a"); public byte[] HashEncript(string Password) { SHA512Managed sha = new SHA512Managed(); byte[] hash = sha.ComputeHash(UnicodeEncoding.Unicode.GetBytes(Password)); return hash; } i want to save byte[] a this value on my database .My database field is varbinary(64).i use msSQL2008 .how to save ,want to know the insert query with C# code.

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  • Change a select list display value upon selecting description

    - by eli
    Hello, I would like a select list that does the following: When the select list is open, display the list of descriptions. When the user selects an item, the select list will close an only the value will be displayed. The reason for this is to conserve space as the values will be much shorter. I'm hoping that there's an answer in jQuery. Thanks.

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