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Version of Apache installed on a Debian machine

How can I check which version of Apache is installed on a Debian machine? 17 Answers ...
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How do I overload the square-bracket operator in C#?

... Overloadability +, -, *, /, %, &, |, <<, >> All C# binary operators can be overloaded. +, -, !, ~, ++, --, true, false All C# unary operators can be overloaded. ==, !=, <, >, <= , >= All relational operators can be overloaded, ...
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Replacing blank values (white space) with NaN in pandas

I want to find all values in a Pandas dataframe that contain whitespace (any arbitrary amount) and replace those values with NaNs. ...
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How to “undelete” a deleted folder in Subversion / TortoiseSVN?

We have accidentally deleted the 'tags' folder from our Subversion repository where we only intended to delete one specific tag. What is the easiest way to get the 'tags' folder back? ...
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CSS Background Opacity [duplicate]

... It's not really correct to say that "Children inherit opacity". They don't. It's just that if a child is contained in a parent with opacity, the child will have opacity: 1, but the parent applies it's opacity to itself including all it'...
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How do I drag and drop files into an application?

...orm1 : Form { public Form1() { InitializeComponent(); this.AllowDrop = true; this.DragEnter += new DragEventHandler(Form1_DragEnter); this.DragDrop += new DragEventHandler(Form1_DragDrop); } void Form1_DragEnter(object sender, DragEventArgs e) { if (e.Data....
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.htaccess - how to force “www.” in a generic way?

... This solution works only if you want all sub-domains forwarded to www.yourdomain.com. If you only want to force www, you should update the second line to be: RewriteCond %{HTTP_HOST} ^yourdomain.com [NC] – Jared Pomranky Ma...
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What vim plugins are available for Eclipse? [closed]

...ave marks. It provides the core functionality of Vim text editing. If I recall correctly you can even have a simple vimrc configuration file. You can do a free trial to test it out. Vrapper Apparently Vrapper has macros and marks, as well as the following commands: Motions h j k l w W e E b B f ...
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What do two question marks together mean in C#?

...e following statement will assign the first non-null Answer# to Answer (if all Answers are null then the Answer is null): string Answer = Answer1 ?? Answer2 ?? Answer3 ?? Answer4; Also it's worth mentioning while the expansion above is conceptually equivalent, the result of each expression is o...
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Xcode 5: Code signing entitlement errors

...both rows, however, I saw the "Any iOS SDK" subrows for each configuration all set to None, although the Debug/Release rows did list the proper profile/signing identity. Archiving in this state still gave me the error, until I explicitly set all the "Any iOS SDK" rows to their proper values. ...