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  • Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID

    - by Jian Lin
    Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID); ? The ( ) usually is for specifying grouping of something. But in this case, are we supposed to be able to use 2 or more field names... in the example above, it can be all clear that it is 1 field, is it just that the parser is not made to bypass the ( ) when it is all clear? (such as in the language Ruby).

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  • Why might a file only be partially uploaded?

    - by letseatfood
    Why might a file only be partially uploaded? I am improving error-handling in my PHP file upload script and am trying to figure out how to handle UPLOAD_ERR_PARTIAL properly. Should I prompt the user to try uploading the file again, or should I inform them that there is a more severe problem which is preventing them from uploading a possibly legitimate file? Thanks!

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  • Why is FLT_MIN equal to zero?

    - by Nick Forge
    limits.h specifies limits for non-floating point math types, e.g. INT_MIN and INT_MAX. These values are the most negative and most positive values that you can represent using an int. In float.h, there are definitions for FLT_MIN and FLT_MAX. FLT_MAX is equal to a really large number, as you would expect, but why does FLT_MIN equal zero?

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  • why doesn't everyone use RAD tools?

    - by Sorskoot
    RAD tools like Clarion and WinDev claim to be 10x to 20x times faster in development and users of these tools claim the same. If that is thru, why are there so few people using these tools? if an application is made in 40 hours instead of 400 you would make a lot more money, right?

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  • why do ppl hate java ?

    - by dfafa
    so today in my Java class.... someone bluntly stated today, it's piece of ** and the professor laughed too. some girl said she's slower in coding because of Java.... why such hatred for Java ?

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  • Why doesn't TextBlock databinding call ToString() on a property whose compile-time type is an interf

    - by Jay
    This started with weird behaviour that I thought was tied to my implementation of ToString(), and I asked this question: http://stackoverflow.com/questions/2916068/why-wont-wpf-databindings-show-text-when-tostring-has-a-collaborating-object It turns out to have nothing to do with collaborators and is reproducible. When I bind Label.Content to a property of the DataContext that is declared as an interface type, ToString() is called on the runtime object and the label displays the result. When I bind TextBlock.Text to the same property, ToString() is never called and nothing is displayed. But, if I change the declared property to a concrete implementation of the interface, it works as expected. Is this somehow by design? If so, any idea why? To reproduce: Create a new WPF Application (.NET 3.5 SP1) Add the following classes: public interface IFoo { string foo_part1 { get; set; } string foo_part2 { get; set; } } public class Foo : IFoo { public string foo_part1 { get; set; } public string foo_part2 { get; set; } public override string ToString() { return foo_part1 + " - " + foo_part2; } } public class Bar { public IFoo foo { get { return new Foo {foo_part1 = "first", foo_part2 = "second"}; } } } Set the XAML of Window1 to: <Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <StackPanel> <Label Content="{Binding foo, Mode=Default}"/> <TextBlock Text="{Binding foo, Mode=Default}"/> </StackPanel> </Window> in Window1.xaml.cs: public partial class Window1 : Window { public Window1() { InitializeComponent(); DataContext = new Bar(); } } When you run this application, you'll see the text only once (at the top, in the label). If you change the type of foo property on Bar class to Foo (instead of IFoo) and run the application again, you'll see the text in both controls.

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  • Why IE6 is messing the menu?

    - by Nitz
    Hey Guys, I had made website. This is Link for that. There is one menu in this site which works well in Firefox , Chrome, Opera. But it is messed in the IE 6. I want to know why is not showing correctly?

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  • How to figure out why .NET app runs at 32-bit on a 64-bit machine

    - by user54064
    I have a .NET app (webforms - .NET 3.5) that is running on a 64-bit server as 32-bit (I checked the IntPtr.Size result). The compilation is set to AnyCPU so I would expect that on a 64-bit machine, the app would be run at 64-bit. There are many Third-party programs incorporated into the app, could they be causing a problem? How do I figure out why 64-bit compilation is not being done?

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  • Why the vertical scroll bar moves automatically ?

    - by Misha Moroshko
    I don't understand why the vertical scroll bar moves automatically to the most top position when "Line 9" clicked, for example. Further clicks does not move the scroll bar. Could anyone explain why, and how to fix this ? I work with Firefox 3.6.3. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <body> <div> <table> <tr row='0'><td class='column1'>Line 0</td></tr> <tr row='1'><td class='column1'>Line 1</td></tr> <tr row='2'><td class='column1'>Line 2</td></tr> <tr row='3'><td class='column1'>Line 3</td></tr> <tr row='4'><td class='column1'>Line 4</td></tr> <tr row='5'><td class='column1'>Line 5</td></tr> <tr row='6'><td class='column1'>Line 6</td></tr> <tr row='7'><td class='column1'>Line 7</td></tr> <tr row='8'><td class='column1'>Line 8</td></tr> <tr row='9'><td class='column1'>Line 9</td></tr> </table> </div> </body> $(document).ready(function() { $(".column1").each(function(index) { $(this).after("<td class='column2'>Details " + index + "</td>"); $(this).toggle(function() { $("[row='" + index + "'] .column2").fadeIn("fast") }, function() { $("[row='" + index + "'] .column2").fadeOut("fast") }); }); }); div { overflow: auto; height: 100px; width: 300px; border: 1px solid blue; } .column1 { cursor: pointer; } .column2 { display: none; }

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  • Why MyModel.all works in Rails ?

    - by AntonAL
    Hi, i don't understand this little thing: Suppose, we have "Person" model class Person < ActiveRecord::Base end Why Person.all works ? Person.all.each { |p| do_something } This syntax tells us, that we have Person class-object instanciated somewhere ? Or is it some convention over configuration case ?

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  • Find out why Xcode has decided to link to a particular library

    - by andygeers
    I'm using the Unity 3D engine to build an iPhone app, and when I go to generate my Xcode project for compilation, it includes a few fairly large libraries: Mono.Security.dll.s, System.dll.s, System.Core.dll.s, etc. I don't know if this question is really an Xcode question or a Unity question, but I'm trying to figure out why each of those libraries is being linked - which functions / classes are being referenced - ideally so that I can rewrite my code to remove as many of the dependencies as possible. Does anybody know a way to find this information out?

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  • jqTouch - why does the transition has no animation?

    - by teepusink
    Hi, I'm using jqTouch. Trying to figure out why when the scene / div change, it just change abruptly without the slide animation? Here is the setting that I have now: var jQT = new $.jQTouch({ slideSelector: '.link', useAnimations: true }); Again the scene change works just fine, just that I don't see the slide animation. What am I missing? Thanks, Tee

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  • Why doesn't $("#RadioButtons:checked").val() work in IE?

    - by Randy Heaps
    Why doesn't $("#RadioButtons:checked").val() - id selector - work in Internet Explorer but $("input:radio[name='RadioButtons']:checked").val() - name selector - does? <input name="RadioButtons" id="RadioButtons" type="radio" value="1" checked> <input name="RadioButtons" id="RadioButtons" type="radio" value="2"> <script> alert($("#RadioButtons:checked").val()); alert($("input:radio[name='RadioButtons']:checked").val()); </script>

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