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Is there a performance difference between i++ and ++i in C++?
...ive Summary: Use ++i if you don't have a specific reason to use i++.]
For C++, the answer is a bit more complicated.
If i is a simple type (not an instance of a C++ class), then the answer given for C ("No there is no performance difference") holds, since the compiler is generating the code.
Howe...
Detect backspace in empty UITextField
...work. Try setting the text field's text to a zero width space character \u200B. When backspace is pressed on a text field that appears empty, it will actually delete your space. Then you can just reinsert the space.
May not work if the user manages to move the caret to the left of the space.
...
How to “crop” a rectangular image into a square with CSS?
... your imagine inside the div.
Profit.
For example:
<div style="width:200px;height:200px;overflow:hidden">
<img src="foo.png" />
</div>
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How to sum up elements of a C++ vector?
...
Actually there are quite a few methods.
int sum_of_elems = 0;
C++03
Classic for loop:
for(std::vector<int>::iterator it = vector.begin(); it != vector.end(); ++it)
sum_of_elems += *it;
Using a standard algorithm:
#include <numeric>
sum_of_elems = std::accumulat...
Iterator Loop vs index loop [duplicate]
I'm reviewing my knowledge on C++ and I've stumbled upon iterators. One thing I want to know is what makes them so special and I want to know why this:
...
Passing an array to a query using a WHERE clause
...next query is run, is that still dangerous?
– ministe2003
Sep 9 '14 at 13:52
3
@ministe2003 Imagi...
Animated loading image in picasso
...shape="rectangle">
<size
android:width="200dp"
android:height="200dp"/>
<solid
android:color="#00FFFFFF"/>
</shape>
</item>
<item android:gravity="center">
<animated...
What are the rules for calling the superclass constructor?
What are the C++ rules for calling the superclass constructor from a subclass one?
10 Answers
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Elegant solution to duplicate, const and non-const, getters? [duplicate]
...
I recall from one of the Effective C++ books that the way to do it is to implement the non-const version by casting away the const from the other function.
It's not particularly pretty, but it is safe. Since the member function calling it is non-const, the ob...
Visual Studio 2010 - C++ project - remove *.sdf file
...d in the same folder)
Go to Tools -> Options -> Text Editor -> C/C++ -> Advanced
In the "Fallback Location", set "Always Use Fallback Location" to True and "Do Not Warn If Fallback Location Used" to True.
In "Fallback Location" you can either put a path like C:\Temp or if you leave i...