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Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术
...向线程标识符结构pthread_t的指针，第二个参数为线程属性设置结构的指针，一般可以设为NULL使用默认属性，最后两个参数是线程创建后立刻执行的回调函数的函数指针及回调函数的参数。
线程创建成功后，开始执行回调函数，...
从Code Review 谈如何做技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...们回复和讨论的过程中，居然发现有个“因为对方用户的设置”我无法回复了（我被拉黑了，还有一些直接就是冷讽和骂人了，微博中我就直接删除了）。这些批评我的阿里工程师/架构师的观点总结一下如下：（顺便说一下，...
Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ator
return ret
end
为之前定义的两个table设置MetaTable：（其中的setmetatble是库函数）
1
2
setmetatable(fraction_a, fraction_op)
setmetatable(fraction_b, fraction_op)
于是你就可以这样干了：（调...
What's the best way to set a single pixel in an HTML5 canvas?
...() to draw a pixel (there should be no aliasing issues):
ctx.fillStyle = "rgba("+r+","+g+","+b+","+(a/255)+")";
ctx.fillRect( x, y, 1, 1 );
You can test the speed of these here: http://jsperf.com/setting-canvas-pixel/9 or here https://www.measurethat.net/Benchmarks/Show/1664/1
I recommend test...
How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
...s and got the whole thing to compile. Here is the result:
+ (NSArray*)getRGBAsFromImage:(UIImage*)image atX:(int)x andY:(int)y count:(int)count
{
NSMutableArray *result = [NSMutableArray arrayWithCapacity:count];
// First get the image into your data buffer
CGImageRef imageRef = [imag...
Can you set a border opacity in CSS?
...-transparent. The best way to make the border semi-transparent is with the rgba color format. For example, this would give a red border with 50% opacity:
div {
border: 1px solid rgba(255, 0, 0, .5);
-webkit-background-clip: padding-box; /* for Safari */
background-clip: padding-box; /* ...
为什么你有10年经验，但成不了专家？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...等方式，还有的反馈就是提供一定的外部激励。
比如设置每周的团队分享会，让每个人分享自己写文案使用的技巧，分享自己本周最得意的一个文案等。（担心这周自己讲不出干货？好好练吧！）
就像前面说的，刻意练习...
Making text background transparent but not text itself
...
Don't use opacity for this, set the background to an RGBA-value instead to only make the background semi-transparent. In your case it would be like this.
.content {
padding:20px;
width:710px;
position:relative;
background: rgb(204, 204, 204); /* Fallback for ol...
关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...p; while ($conn = stream_socket_accept($socket, -1)) { // 这样设置不超时才油用
static $id = 0;
static $ct = 0;
&n...
Convert string in base64 to image and save on filesystem in Python
...IL import Image
from base64 import decodestring
image = Image.fromstring('RGB',(width,height),decodestring(imagestr))
image.save("foo.png")
Since the imagestr is just the encoded png data
from base64 import decodestring
with open("foo.png","wb") as f:
f.write(decodestring(imagestr))
...