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cancelling queued performSelector:afterDelay calls
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In order to cancel all previous perform requests, you may use :
[NSObject cancelPreviousPerformRequestsWithTarget:self];
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libpng warning: iCCP: known incorrect sRGB profile
...the Qt Library.
Example
Here is a minimal example I have written in C++ in order to demonstrate how to implement the proposed solution:
QPixmap pixmap;
pixmap.load("badProfileImage.png");
QFile file("goodProfileImage.png");
file.open(QIODevice::WriteOnly);
pixmap.save(&file, "PNG");
The comple...
How to post JSON to a server using C#?
... it is possible to leverage the using statement's default functionality in order to omit explicitly calling Flush and Close.
var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://url");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWrite...
Run R script from command line
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One should use R -r 'options(warn=2); install...' in order to halt the execution and get a non-zero error code in case the installation fails. Otherwise, any install.packages errors are just warnings.
– rvernica
Jan 18 '17 at 16:41
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Replace all elements of Python NumPy Array that are greater than some value
... 0, 255, arr)
(the out= name is optional since the arguments in the same order as the function's definition.)
For in-place modification, the boolean indexing speeds up a lot (without having to make and then modify the copy separately), but is still not as fast as minimum:
In [328]: %%timeit
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Vertex shader vs Fragment Shader [duplicate]
...tput from the vertex shader and associates colors, depth value of a pixel, etc. After these operations the fragment is send to Framebuffer for display on the screen.
Some operation, as for example lighting calculation, you can perform in vertex shader as well as fragment shader. But fragment shader...
What is the difference between concurrent programming and parallel programming?
...terministic because the responses are not necessarily received in the same order each time the program is run. This characteristic can make it very hard to debug concurrent programs. Some applications are fundamentally concurrent, e.g. web servers must handle client connections concurrently. Erlang,...
Error 1022 - Can't write; duplicate key in table
...I would have never guessed it and you saved my day. Using fk_id_1, fk_id_2 etc, now. Thanks.
– JackLeEmmerdeur
Dec 22 '16 at 15:22
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Redirecting from HTTP to HTTPS with PHP
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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What is the difference between iterator and iterable and how to use them?
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I will answer the question especially about ArrayList as an example in order to help you understand better..
Iterable interface forces its subclasses to implement abstract method 'iterator()'.
public interface Iterable {
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abstract Iterator<T> iterator(); //Returns an 'Iterator'...