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ZMQ: 基本原理 - 开源 & Github - 清泛网移动版 - 专注C/C++及内核技术
ZMQ: 基本原理0MQ-The-Theoretical-Foundation介绍与其他的基于常规理论基础的（集中）通信系统不同，几乎没有分布式通信系统的什么资料，ØMQ(ZeroMQ)是感兴趣的读者少数能请举出...
介绍
与其他的基于常规理论基础的...
How do I detect what .NET Framework versions and service packs are installed?
...--------------------------------------------------------------------------
1.0 HKLM\Software\Microsoft\.NETFramework\Policy\v1.0\3705
1.1 HKLM\Software\Microsoft\NET Framework Setup\NDP\v1.1.4322\Install
2.0 HKLM\Software\Microsoft\NET Framework Setup\N...
Convert a number range to another range, maintaining ratio
...x - portion
return result
#test cases
print remap( 25.0, 0.0, 100.0, 1.0, -1.0 ), "==", 0.5
print remap( 25.0, 100.0, -100.0, -1.0, 1.0 ), "==", -0.25
print remap( -125.0, -100.0, -200.0, 1.0, -1.0 ), "==", 0.5
print remap( -125.0, -200.0, -100.0, -1.0, 1.0 ), "==", 0.5
#even when value is out...
Why does the 260 character path length limit exist in Windows?
...still own and use a Windows application that was written to run on Windows 3.11. It still runs on 64-bit Windows 10. That is what backwards compatibility gets you.
Microsoft did create a way to use the full 32,768 path names; but they had to create a new API contract to do it. For one, you should u...
Does a valid XML file require an XML declaration?
...le using Sax Parser of Xerces.
Is the XML declaration <?xml version="1.0" encoding="UTF-8"?> required?
3 Answers
...
libevent对比libev的基准测试 - C/C++ - 清泛网 - 专注C/C++及内核技术
...接收数据。
使用的基准程序是bench.c，取自 libevent 发行版，经过修改以收集每次测试迭代的总时间，可选择启用事件观察器的超时以及可选择使用本机 libev API 并以不同方式输出时间。
对于 libevent，使用版本 1.4.3，而对于 libev...
Show DialogFragment with animation growing from a point
...folder:
( the android:pivotY is the key )
anim_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:interpolator="@android:anim/linear_interpolator"
android:fromXScale="0.0"
android...
Why doesn't Python have a sign function?
...just use copysign and forget about it.
>>> math.copysign(1, -4)
-1.0
>>> math.copysign(1, 3)
1.0
If you get sick of passing two whole arguments, you can implement sign this way, and it will still be compatible with the IEEE stuff mentioned by others:
>>> sign = functoo...
Can I change the viewport meta tag in mobile safari on the fly?
...rt]");
viewport.setAttribute('content', 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0');
Just change the parts you need and Mobile Safari will respect the new settings.
Update:
If you don't already have the meta viewport tag in the source, you can append it directly ...
重构理论及实践——用工厂模式重构c++后台代码 - C/C++ - 清泛网 - 专注C/C...
...构的，架构的问题咱们在这儿就不展开聊了：）
代码V1版
遵循tsf4j的tapp写法，ServerCenterApp类是后台程序的主逻辑类，其中process_pkg是消息处理的主逻辑函数。会对不同的消息调用不同的消息processor函数。而每个消息processor函...