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Where and why do I have to put the “template” and “typename” keywords?
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(See here also for my C++11 answer)
In order to parse a C++ program, the compiler needs to know whether certain names are types or not. The following example demonstrates that:
t * f;
How should this be parsed? For many languages a compiler do...
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.
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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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Passing variable arguments to another function that accepts a variable argument list
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Maybe throwin a rock in a pond here, but it seems to work pretty OK with C++11 variadic templates:
#include <stdio.h>
template<typename... Args> void test(const char * f, Args... args) {
printf(f, args...);
}
int main()
{
int a = 2;
test("%s\n", "test");
test("%s %d %d %p\n"...
What is the “assert” function?
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"assert usually raises an exception" -- in C++ it does not rise "exception" it calls abort... it is little bit different.
– Artyom
Oct 15 '09 at 10:55
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Why is volatile not considered useful in multithreaded C or C++ programming?
...le unnecessary. We can just remove the volatile qualifier entirely.
Since C++11, atomic variables (std::atomic<T>) give us all of the relevant guarantees.
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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...
Does anyone have benchmarks (code & results) comparing performance of Android apps written in Xamari
... multipe forms to execute code in:
RenderScript (CPU and GPU)
Java (SDK)
C++ (NDK)
OpenGL (GPU)
It is quite obvious that when executing code the more native the solution the faster it will be. A run-time based language will never beat a language that directly runs on the CPU.
But on the other h...
Is it possible to serialize and deserialize a class in C++?
Is it possible to serialize and deserialize a class in C++?
13 Answers
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