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Pinging servers in Python
...bility in cases where your hostname string might not be validated.
import platform # For getting the operating system name
import subprocess # For executing a shell command
def ping(host):
"""
Returns True if host (str) responds to a ping request.
Remember that a host may not respo...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...内存泄露概念
众所周知，在Java中有些对象的生命周期是有限的，当它们完成了特定的逻辑后将会被垃圾回收；但是，如果在对象的生命周期本来该被垃圾回收时这个对象还被别的对象所持有引用，那就会导致内存泄漏；这样的...
Service vs IntentService in the Android platform
I am seeking an example of something that can be done with an IntentService that cannot be done with a Service (and vice-versa)?
...
What exactly is Heroku?
...
Heroku is a cloud platform as a service. That means you do not have to worry about infrastructure; you just focus on your application.
In addition to what Jonny said, there are a few features of Heroku:
Instant Deployment with Git push - bu...
How to measure elapsed time in Python?
...recated since version 3.3: The behaviour of this function depends
on the platform: use perf_counter() or process_time() instead,
depending on your requirements, to have a well defined behaviour.
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移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...移动设备的屏幕像素密度越来越高，从iphone4开始，苹果公司便推出了所谓的Retina屏，分辨率提高了一倍，变成640x960，但屏幕尺寸却没变化，这就意味着同样大小的屏幕上，像素却多了一倍，这时，一个css像素是等于两个物理像...
BLE（一）概述&工作流程&常见问题 - 创客硬件开发 - 清泛IT社区，...
...个人信息到该设备。现在市场上已经出现了很多Bluejacking软件。可以通过把手机设置成不可发现模式来避免此类攻击。
The name does not exist in the namespace error in XAML
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Try changing the build target platform to x86 and building the project.
I noticed via Subversion that I apparently changed the project build Platform target to x64. This was the only change I had made. After making that change, the code was working for a...
What's the right OAuth 2.0 flow for a mobile app
...ferenced triggers a registered "handler" (the details depend on the mobile platform).
If available, use a special "web view", such as the WebAuthenticationBroker on Windows 8, to control and access the HTTP redirect responses.
Hope this helps
Pedro
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How can I develop for iPhone using a Windows development machine?
...an 100K USD in annual revenue). Unity supports iOS, Android and most other platforms. It may be possible to use Unity's "Cloud Build" feature to avoid having to use a Mac for deployment, although by default Unity actually spits out an Xcode project when building for iOS.
Other options:
PhoneGap (h...