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Maximum length of the textual representation of an IPv6 address?
I want to store the data returned by $_SERVER["REMOTE_ADDR"] in PHP into a DB field, pretty simple task, really. The problem is that I can't find any proper information about the maximum length of the textual representation of an IPv6 address, which is what a webserver provides through $_SERVER...
可重入函数、不可重入函数及线程安全 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的可重入函数：
accept
fchmod
lseek
sendto
stat
access
fchown
lstat
setgid
symlink
aio_error
fcntl
mkdir
setpgid
sysconf
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how do I make a single legend for many subplots with matplotlib?
I am plotting the same type of information, but for different countries, with multiple subplots with matplotlib. That is, I have 9 plots on a 3x3 grid, all with the same for lines (of course, different values per line).
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Objective-C categories in static library
Can you guide me how to properly link static library to iPhone project. I use static library project added to app project as direct dependency (target -> general -> direct dependencies) and all works OK, but categories. A category defined in static library is not working in app.
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Timer function to provide time in nano seconds using C++
I wish to calculate the time it took for an API to return a value.
The time taken for such an action is in the space of nano seconds. As the API is a C++ class/function, I am using the timer.h to caculate the same:
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How to create border in UIButton?
I use custom button in my app named "addButton" and I want to border it with white color how can i get the white color border around my custom button?
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How to link Docker services across hosts?
Docker allows servers from multiple containers to connect to each other via links and service discovery . However, from what I can see this service discovery is host-local. I would like to implement a service that uses other services hosted on a different machine.
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
When passing argument to main() in a C or C++ application, will argv[0] always be the name of the executable? Or is this just a common convention and not guaranteed to be true 100% of the time?
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How can i take an UIImage and give it a black border?
How can I set the border of a UIImage ?
16 Answers
16
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How to Rotate a UIImage 90 degrees?
I have a UIImage that is UIImageOrientationUp (portrait) that I would like to rotate counter-clockwise by 90 degrees (to landscape). I don't want to use a CGAffineTransform . I want the pixels of the UIImage to actually shift position. I am using a block of code (shown below) originally inten...