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Why do I get “unresolved external symbol” errors when using templates? [duplicate]
When I write C++ code for a class using templates and split the code between a source (CPP) file and a header (H) file, I get a whole lot of "unresolved external symbol" errors when it comes to linking the final executible, despite the object file being correctly built and included in the linking. ...
How to get JS variable to retain value after page refresh? [duplicate]
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This is possible with window.localStorage or window.sessionStorage. The difference is that sessionStorage lasts for as long as the browser stays open, localStorage survives past browser restarts. The persistence applies to the entire web site not just a single...
Alternatives to dispatch_get_current_queue() for completion blocks in iOS 6?
...s appealing, but ultimately not a great idea. That queue could be a low priority queue, the main queue, or some other queue with odd properties.
My favorite approach to this is to say "the completion block runs on an implementation defined queue with these properties: x, y, z", and let the block di...
CSS hexadecimal RGBA?
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The CSS Color Module Level 4 will probably support 4 and 8-digit hexadecimal RGBA notation!
Three weeks ago (18th of December 2014) the CSS Color Module Level 4 editor's draft was submitted to the CSS W3C Working Group. Though in a st...
Git commit in terminal opens VIM, but can't get back to terminal
Trying to learn GitHub at the moment and doing this Git essentials tutorial over at nettuts. I'm on the lesson about making commits.
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How does the new automatic reference counting mechanism work?
Can someone briefly explain to me how ARC works? I know it's different from Garbage Collection, but I was just wondering exactly how it worked.
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How do I enable EF migrations for multiple contexts to separate databases?
How do I enable Entity Framework 5 (version 5.0.0) migrations for multiple DB contexts in the same project, where each context corresponds to its own database? When I run Enable-Migrations in the PM console (Visual Studio 2012), there's an error because of there being multiple contexts:
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Plain Old CLR Object vs Data Transfer Object
POCO = Plain Old CLR (or better: Class) Object
10 Answers
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How to initialize an array in one step using Ruby?
...n also use a range:
array = ('1'..'3').to_a # parentheses are required
# or
array = *('1'..'3') # parentheses not required, but included for clarity
For arrays of whitespace-delimited strings, you can use Percent String syntax:
array = %w[ 1 2 3 ]
You can also pass a block to Array.new t...
What is a mixin, and why are they useful?
... "mixins". I'm from a C/C++/C# background and I have not heard the term before. What is a mixin?
16 Answers
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