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How do I detect unsigned integer multiply overflow?

I was writing a program in C++ to find all solutions of a b = c , where a , b and c together use all the digits 0-9 exactly once. The program looped over values of a and b , and it ran a digit-counting routine each time on a , b and ab to check if the digits condition was satisfied. ...
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jQuery Ajax calls and the Html.AntiForgeryToken()

...gt;<%= Html.AntiForgeryToken()%></form> Then in your ajax call do (edited to match your second example) $.ajax({ type: "post", dataType: "html", url: $(this).attr("rel"), data: AddAntiForgeryToken({ id: parseInt($(this).attr("title")) }), success: function (respo...
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Is it safe to push_back an element from the same vector?

If the second push_back causes a reallocation, the reference to the first integer in the vector will no longer be valid. So this isn't safe? ...
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Are list-comprehensions and functional functions faster than “for loops”?

...ike map() , filter() and reduce() faster than a for loop? Why, technically, they run in a C speed , while the for loop runs in the python virtual machine speed ?. ...
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How to change the name of a Django app?

...e changed the name of an app in Django by renaming its folder, imports and all its references (templates/indexes). But now I get this error when I try to run python manage.py runserver ...
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add column to mysql table if it does not exist

... OK this is really crude but someone's got to say it. if you are simply running a SQL script from the command line, you can give mysql the --force switch, which means keep going even if there's an error. then, just go for it. you just want...
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How do I get an animated gif to work in WPF?

...und so far: https://github.com/XamlAnimatedGif/WpfAnimatedGif You can install it with NuGet PM> Install-Package WpfAnimatedGif and to use it, at a new namespace to the Window where you want to add the gif image and use it as below <Window x:Class="MainWindow" xmlns="http://schemas.micr...
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How do I filter ForeignKey choices in a Django ModelForm?

... can populate the validation data by making using the super(...).__init__ call in your overridden method. If you are making several of these queryset changes its a lot more elegant to package them by overriding the init method. – michael Aug 7 '09 at 4:53 ...
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What is the meaning of “__attribute__((packed, aligned(4))) ”

...gned(1))) sSampleStruct; so the above specified gcc attribute does not allow the structure padding. so the size will be 8 bytes. If you wish to do the same for all the structures, simply we can push the alignment value to stack using #pragma #pragma pack(push, 1) //Structure 1 ...... //Stru...
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Checking images for similarity with OpenCV

...he same image was passed twice, 0% would be returned if the images were totally different. 4 Answers ...