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Vim: How to insert in visual block mode?

...t+i or capital I. Lowercase i will not work. Then type the things you want and finally to apply it to all lines, press Esc twice. If this doesn't work... Check if you have +visualextra enabled in your version of Vim. You can do this by typing in :ver and scrolling through the list of features. (Y...
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Are (non-void) self-closing tags valid in HTML5?

...ich leads to <br /> meaning <br>> (i.e. <br>>) and <title/hello/ meaning <title>hello</title>). This is an SGML rule that browsers did a very poor job of supporting, and the spec advises authors to avoid the syntax. In XHTML, <foo /> means <foo>...
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What in the world are Spring beans?

I am yet to find a high-level definition of Spring beans that I can understand. I see them referenced often in Grails documentation and books, but I think that understanding what they are would be beneficial. So what are Spring beans? How can they be used? Do they have something to do with Dependenc...
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warning this call is not awaited, execution of the current method continues

Just got VS2012 and trying to get a handle on async . 10 Answers 10 ...
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GCC -g vs -g3 GDB Flag: What is the Difference?

...extensions if at all possible. -gvmslevel Request debugging information and also use level to specify how much information. The default level is 2. Level 0 produces no debug information at all. Thus, -g0 negates -g. .... Level 3 includes extra information, such as all the macro definitions presen...
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Only mkdir if it does not exist [duplicate]

...conditions in concurrent execution. So, depending on what your script does and in which environment it lives the first option given is this answer should be preferred. Also, you could just mkdir product 2>/dev/null and not care. – user1129682 Sep 4 '13 at 20...
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Is there any significant difference between using if/else and switch-case in C#?

... (unlike many other languages) also allows to switch on string constants - and this works a bit differently. It's obviously not practical to build jump tables for strings of arbitrary lengths, so most often such switch will be compiled into stack of IFs. But if number of conditions is big enough t...
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Why should we include ttf, eot, woff, svg,… in a font-face

... , there are multiple font types included like ttf , eot , woff , svg and cff . 3 Answers ...
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How to make div background color transparent in CSS

...that allows you to do that. Just create a new image, delete the background and put a semi-transparent color in it, then save it in png.) As said by René, the best thing to do would be to mix both, with the rgba first and the 1px by 1px image as a fallback if the browser doesn't support alpha : ba...
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Compiling C++11 with g++

I'm trying to update my C++ compiler to C++11. I have searched a bit and I have come to the conclusion that I have to use the flag -std=c++0x or -std=gnu++0x , but I don't know many things about flags. Can anyone help me? (I'm using Ubuntu 12.04.) ...