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What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
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ARC will also generate code following ObjC naming conventions, so if you mix ARC and MRC code you can get surprising results if the MRC code doesn't do what the compiler thinks the names promise.
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Error handling in C code
...edef'ed enum and use it in your lib. Don't just return ints or even worse, mix ints or different enumerations with return-codes.
provide a function that converts errors into something human readable. Can be simple. Just error-enum in, const char* out.
I know this idea makes multithreaded use a bit ...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
创APP如搭积木 - 创意无限，梦想即时！ 手机版 手机“扫一扫” var qrcode = new QRCode("qrcode", { text: 'https://m.tsingfun.com/it/opensource/0MQ-The-Theoretical-Foundation.html', //URL地址 width: 180, height: 180, colorDark: '#088CEF'...
In a storyboard, how do I make a custom cell for use with multiple controllers?
...ble in storyboard, which can be used in any TableViewController we have to mix the Storyboard and xib approach. Suppose we have a cell named as CustomCell which is to be used in the TableViewControllerOne and TableViewControllerTwo. I am making it in steps.
1. File > New > Click File > Sele...
What integer hash function are good that accepts an integer hash key?
...owing, even thought it might not be the fastest. This one is based on splitmix64, which seems to be based on the blog article Better Bit Mixing (mix 13).
uint64_t hash(uint64_t x) {
x = (x ^ (x >> 30)) * UINT64_C(0xbf58476d1ce4e5b9);
x = (x ^ (x >> 27)) * UINT64_C(0x94d049bb133...
Disable ALL CAPS menu items in Visual Studio 2013
... Update 3 RC, an option has been added in Tools -> Options to change to Mixed Case for Menu titles. Obviously this is not for VS 2012 but going forward this option will be there.
Here is the notification from Brian Harry of Microsoft....
Mixed Case Menus – I know I’m going to get some fe...
VideoRecorder 拓展：前台预览录制 + 后台无预览录制，支持分辨率、码率设...
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What are best practices that you use when writing Objective-C and Cocoa? [closed]
...stly important when someFloat may actually be a double, you don't need the mixed-mode math, since you're losing precision in 'val' on storage. While floating-point numbers are supported in hardware on iPhones, it may still take more time to do double-precision arithmetic as opposed to single precis...
PHP String to Float
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You want the non-locale-aware floatval function:
float floatval ( mixed $var ) - Gets the float value of a string.
Example:
$string = '122.34343The';
$float = floatval($string);
echo $float; // 122.34343
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SQL order string as number
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and if you have mixed string and number and want them both sorted, use "order by col * 1, col"
– Hayden Thring
Feb 23 '15 at 3:42
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