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How to convert a std::string to const char* or char*?

...tation will need to do some extra memory allocation and/or data copying in order to prepare the NUL terminated buffer As a further hint, if a function's parameters require the (const) char* but don't insist on getting x.size(), the function probably needs an ASCIIZ input, so .c_str() is a good cho...
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Why does one use dependency injection?

...about what would happen if B needed some parameters in its constructor: in order to instantiate it, A would have to know about those parameters, something that might be completely unrelated to A (it just wants to depend on B, not on what B depends on). Passing an already constructed B (or any subcla...
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Eclipse Workspaces: What for and why?

...onvenience of auto-complete and the view of your libraries (and docs ) in order to avoid syntax errors to say at least. In no circumstance you would jeopardize this functionality. – Lazaros Kosmidis May 7 '16 at 16:05 ...
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Why can't I initialize non-const static member or static array in class?

... static const A b = A(); is not allowed and must be constexpr or inline in order to permit an initialiser for a static object with class type i.e to make a static member of class type more than a declaration. So yes in certain situations A a; is not the same as explicitly initialising A a = A(); (th...
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Is there a way to change the spacing between legend items in ggplot2?

...position = "left", title.vjust = 1, # draw border around the legend frame.colour = "black", barwidth = 15, barheight = 1.5)) For vertical legends, settinglegend.key.size...
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Understanding typedefs for function pointers in C

...fined by their return value and the types of parameters they accept. So in order to fully describe a function, you must include its return value and the type of each parameter is accepts. When you typedef such a definition, you give it a 'friendly name' which makes it easier to create and reference ...
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JSP tricks to make templating easier?

... Note - it seems the order of tags is important; jsp:attribute must come before jsp:body or you'll get an error. Also I had to set a corresponding @attribute tag to match jsp:invoke to avoid another error. Using GlassFish 3.2.2 ...
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Deploying my application at the root in Tomcat

...p in two ways: http://example.com/ and http://example.com/APP/ Step 3: In order to prevent unwanted access to the root and manager folder, add a valve to those context tags like this: <Context path="/manager" docBase="manager" privileged="true"> <WatchedResource>WEB-INF/web.xml<...
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What is the difference between NTFS Junction Points and Symbolic Links?

...n a path is parsed in an open, the system remembers traversed junctions in order to evaluate relative symlinks that traverse mount points. These traversals need to handle a junction as if it's a regular directory, whereas a symlink is parsed as its target path. For example, say "C:\junction" and "C:...
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What are the differences between NP, NP-Complete and NP-Hard?

...ner. Decidable problems have to result in a definitive yes or no answer in order to be considered to be decidable. The Halting Problem does not have a definitive yes or now answer since an arbitrary answer might throw any solution into a loop. – rjzii Dec 13 '0...