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How do I use extern to share variables between source files?

...ler is informed that a variable exists (and this is its type); it does not allocate the storage for the variable at that point. A variable is defined when the compiler allocates the storage for the variable. You may declare a variable multiple times (though once is sufficient); you may only defin...
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How to select a node using XPath if sibling node has a specific value?

... Seems I actually didn't read the title. :) Answer stays valid anyway. – Jens Erat Jun 11 '13 at 13:34 2 ...
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Cassandra port usage - how are the ports used?

...ending on version), to allow for remote JMX access. Something that doesn't appear to be particularly well documented, but has tripped me up in the past. share | improve this answer | ...
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Zooming editor window android studio [duplicate]

...know how to zoom in/out of the editor window in android studio? I have actually researched it before people give me minus marks. Ctrl+ and Ctrl- seem to fold and unfold methods, there is no zoom control in the view drop-down and all the googleing ive done has referred my to zoom the control feature...
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How can I find where I will be redirected using cURL?

...topt($ch, CURLOPT_FOLLOWLOCATION, true); Erm... I don't think you're actually executing the curl... Try: curl_exec($ch); ...after setting the options, and before the curl_getinfo() call. EDIT: If you just want to find out where a page redirects to, I'd use the advice here, and just use Curl to ...
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Why does JQuery have dollar signs everywhere?

...ring your using noConflict (more below) var divs = $("div"); // Find all divs var divs = jQuery("div"); // Also find all divs, because console.log($ === jQuery); // "true" If you don't want to use the alias, you don't have to. And if you want $ to not be an alias for jQuery, you can use noC...
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How do you open an SDF file (SQL Server Compact Edition)? [closed]

... and query it with some UI. How can I do this? I have no Visual Studio installed on the machine and I would like to install as little software as possible. ...
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Swift equivalent for MIN and MAX macros

... With Swift 5, max(_:_:) and min(_:_:) are part of the Global Numeric Functions. max(_:_:) has the following declaration: func max<T>(_ x: T, _ y: T) -> T where T : Comparable You can use it like this with Ints: let maxInt = max(5,...
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Django queries - id vs pk

...ry key field i.e. you don't need to care whether the primary key field is called id or object_id or whatever. It also provides more consistency if you have models with different primary key fields. share | ...
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'sudo gem install' or 'gem install' and gem locations

... Contrary to all the other posts I suggest NOT using sudo when installing gems. Instead I recommend you install RVM and start a happy life with portable gem homes and different version of Ruby all living under one roof. For the uninitia...