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ZeroMQ的学习和研究(PHP代码实例) - C/C++ - 清泛网 - 专注C/C++及内核技术
...着结果搜集的 Sink 机器。因此,我们可以借助这种特性,丰富的扩展原有的三种模式。例如,一个代理 Publisher,作为一个内网的 Subscriber 接受信息,同时将信息,转发到外网,其结构图如图 4 所示。
图4:ZMQ 的扩展模式
六、...
How do I grab an INI value within a shell script?
...
param1=abc
param2=def
param3=ghi
[section3]
param1=000
param2=111
param3=222
Say you want param2 from section2. Run the following:
sed -nr "/^\[section2\]/ { :l /^param2[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" ./file.ini
will give you
def
...
浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
...可,因为没有深入思考过,只知道书上这么写。。于是,我不得不深入思考一下这个被许多人忽视的问题。。
对于无符号整数,很简单,全部位都表示数值,比如 char型,8位,用二进制表示为0000 0000 ~ 1111 1111
1111 1111 最大...
CSS: how to position element in lower right?
...
222
Lets say your HTML looks something like this:
<div class="box">
<!-- stuff -->...
Is it possible to change a UIButtons background color?
...llColorWithColor(context, [color CGColor]);
// [[UIColor colorWithRed:222./255 green:227./255 blue: 229./255 alpha:1] CGColor]) ;
CGContextFillRect(context, rect);
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
Don't forg...
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...://raidenii.net/files/datasheets/misc/qr_code.pdf
基础知识
首先,我们先说一下二维码一共有40个尺寸。官方叫版本Version。Version 1是21 x 21的矩阵,Version 2是 25 x 25的矩阵,Version 3是29的尺寸,每增加一个version,就会增加4的尺寸,公式是...
Creating a CSS3 box-shadow on all sides but one
..._PrimaryNavigation li a.ppStyle_Active
background: #f4f4f4
color: #222
-webkit-border-radius: 6px 6px 0 0
-moz-border-radius: 6px 6px 0 0
border-radius: 6px 6px 0 0
-webkit-box-shadow: 0 0 12px rgba(0,0,0,0.75)
-moz-box-shadow: 0 0 12px rgba(0,0,0,0.75)
box-shadow: 0 ...
What regular expression will match valid international phone numbers?
...240|239|238|237|236|235|234|233|232|231|230|
229|228|227|226|225|224|223|222|221|220|219|
218|217|216|215|214|213|212|211|210|98|95|94|
93|92|91|90|86|84|82|81|66|65|64|63|62|61|60|
58|57|56|55|54|53|52|51|49|48|47|46|45|44|43|
41|40|39|36|34|33|32|31|30|27|20|7|1)[0-9]{0,
14}$
...
How to Truncate a string in PHP to the word closest to a certain number of characters?
...
222
By using the wordwrap function. It splits the texts in multiple lines such that the maximum wi...
Generate colors between red and green for a power meter?
...? For example, the following percentages all return RGB 1,255,0: 0.277, 0.222, 0.111 ... the higher values (for example 1.0) do return the correct RGBs with brighter green, but they stop trailing off after a threshold and I only get shades of green on my scale.
– Patrick
...
