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A potentially dangerous Request.Form value was detected from the client

... I think you are attacking it from the wrong angle by trying to encode all posted data. Note that a "<" could also come from other outside sources, like a database field, a configuration, a file, a feed and so on. Furthermore, "<" is not inherently dangerous. It's only dangerous in a speci...
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PHP: How to use array_filter() to filter array keys?

The callback function in array_filter() only passes in the array's values, not the keys. 14 Answers ...
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How can I write data in YAML format in a file?

I need to write the below data to yaml file using Python: 2 Answers 2 ...
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Waiting until two async blocks are executed before starting another block

... NSLog(@"Block3"); }); // only for non-ARC projects, handled automatically in ARC-enabled projects. dispatch_release(group); and could produce output like this: 2012-08-11 16:10:18.049 Dispatch[11858:1e03] Block1 2012-08-11 16:10:18.052 Dispatch[11858:1d03] Block2 2012-08-11 16:10:23.051 Dis...
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MySQL, Check if a column exists in a table with SQL

...pecific column, and if not — create it. Otherwise do nothing. This is really an easy procedure in any enterprise-class database, yet MySQL seems to be an exception. ...
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What is std::promise?

...get it from the associated future. The asynchronous provider is what initially creates the shared state that a future refers to. std::promise is one type of asynchronous provider, std::packaged_task is another, and the internal detail of std::async is another. Each of those can create a shared sta...
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How to bind a List to a ComboBox?

...ry = (Country)comboBox1.SelectedItem;. If you want the ComboBox to dynamically update you'll need to make sure that the data structure that you have set as the DataSource implements IBindingList; one such structure is BindingList<T>. Tip: make sure that you are binding the DisplayMember to...
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In Django, how do I check if a user is in a certain group?

...add(group) # user is now in the "Editor" group then user.groups.all() returns [<Group: Editor>]. Alternatively, and more directly, you can check if a a user is in a group by: if django_user.groups.filter(name = groupname).exists(): ... Note that groupname can also be the ac...
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How to generate .NET 4.0 classes from xsd?

...or the case you have several interlinked schema definitions just name them all. xsd schema1.xsd schema2.xsd schema3.xsd /c – mivra Oct 24 '16 at 19:40 ...
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How do I create a WPF Rounded Corner container?

...bject (BorderThickness or CornerRadius) you can specify a single number if all 4 are the same, such as CornerRadius="8". – Santiago Palladino Sep 23 '08 at 13:14 3 ...