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How does `is_base_of` work?

...all to check, both versions are viable because Host can be converted to D* and B*. It's a user defined conversion sequence as described by 13.3.3.1.2 from Host<B, D> to D* and B* respectively. For finding conversion functions that can convert the class, the following candidate functions are sy...
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How to put an image in div with CSS?

... This answer by Jaap : <div class="image"></div>​ and in CSS : div.image { content:url(http://placehold.it/350x150); }​ you can try it on this link : http://jsfiddle.net/XAh2d/ this is a link about css content http://css-tricks.com/css-content/ This has been teste...
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Disable cross domain web security in Firefox

...-ons (some of which don't work in the latest Firefox or don't work at all) and "you just need to enable support on the server". ...
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How to add texture to fill colors in ggplot2

I'm currently using scale_brewer() for fill and these look beautiful in color (on screen and via color printer) but print relatively uniformly as greys when using a black and white printer. I searched the online ggplot2 documentation but didn't see anything about adding textures to fill colors. ...
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How Big can a Python List Get?

...ognize them because of the asterix at the end) . Pointers are 4 bytes long and store a memory address to the allocated object. They are "only" 4 bytes long because with 4 bytes you can address every element in a memory of nowadays computers. – Antonio Ragagnin ...
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JavaScript: What are .extend and .prototype used for?

I am relatively new to JavaScript and keep seeing .extend and .prototype in third party libraries I am using. I thought it had to do with the Prototype javascript library, but I am beginning to think that is not the case. What are these used for? ...
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Why aren't python nested functions called closures?

I have seen and used nested functions in Python, and they match the definition of a closure. So why are they called nested functions instead of closures ? ...
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What is the difference between self::$bar and static::$bar in PHP?

What is the difference between using self and static in the example below? 5 Answers ...
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Merging 2 branches together in GIT

I've only just started to use GIT and think its wonderful, however I'm a little confused over what the merge command does. ...
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python list in sql query as parameter

... @bobince in my case I have assigned a variable a='john' and b='snow' and stored it in a tuple with the name got=['a,b'] and did performed the same query. Doing this I got the erroy i.e. Type Error: not all arguments converted during string formatting. How am I supposed to solbe i...