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What is the performance cost of having a virtual method in a C++ class?
Having at least one virtual method in a C++ class (or any of its parent classes) means that the class will have a virtual table, and every instance will have a virtual pointer.
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What is wrong with using goto? [duplicate]
...go):
What is actually wrong with it? Why are goto's even possible in C++ then?
6 Answers
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C/C++ include header file order
...re this is to include your headers before any other headers.
"Thinking in C++" in particular mentions this, referencing Lakos' "Large Scale C++ Software Design":
Latent usage errors can be avoided by ensuring that the .h file of a component parses by itself – without externally-provided declarat...
Exporting functions from a DLL with dllexport
I'd like a simple example of exporting a function from a C++ Windows DLL.
4 Answers
4
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Align contents inside a div
...wrapped in a div tag that uses this wrapper class and all content in it is 200px in width):
.wrapper {
position: absolute;
left: 50%;
margin-left: -100px;
}
EDIT: I forgot to add...you may also want to set width: 0px; on this wrapper div for some browsers to not show the scrollbars, a...
How to link C++ program with Boost using CMake
What should my CMake file look like for linking my program with the Boost library under Ubuntu?
6 Answers
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In Android, how do I set margins in dp programmatically?
...ms params = (MarginLayoutParams) vector8.getLayoutParams();
params.width = 200; params.leftMargin = 100; params.topMargin = 200;
Code Example for MarginLayoutParams:
http://www.codota.com/android/classes/android.view.ViewGroup.MarginLayoutParams
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Why does this code segfault on 64-bit architecture but work fine on 32-bit?
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@WTP - which is a good reason to always use new in C++ and always compile C with a C compiler and not a C++ compiler.
– Flexo♦
Sep 25 '11 at 12:16
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RESTful API methods; HEAD & OPTIONS
...to the options that are available when communicating with that resource.
A 200 response SHOULD include any header fields that indicate optional features implemented by the server and applicable to that resource (e.g., Allow), possibly including extensions not defined by this specification. The respo...
View array in Visual Studio debugger? [duplicate]
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You can try this nice little trick for C++. Take the expression which gives you the array and then append a comma and the number of elements you want to see. Expanding that value will show you elements 0-(N-1) where N is the number you add after the comma.
For ...