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地图组件（高德地图） · App Inventor 2 中文网
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地图 组件提供了三种实用程序，用于通过 App Inventor 操作其边界。
首先，它提供了一个锁定机制，允许地图相对于屏幕上的其他组件移动。其次，解锁后，用户可以将 地图 平移到任意位置。在这个新位置，可以按下“设置...
List of All Locales and Their Short Codes?
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The importance of locales is that your environment/os can provide formatting functionality for all installed locales even if you don't know about them when you write your application. My Windows 7 system has 211 locales installed (listed below), so you wouldn't likely write ...
Design by contract using assertions or exceptions? [closed]
...ulfilled, before starting to work on its responsibilities, right? The two most prominent ways to do these checks are by assert and by exception .
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Difference between framework and static library in xcode4, and how to call them
...built-in frameworks like Foundation and UIKit) and they should just work (most of the time).
Most frameworks contain dynamic libraries; frameworks created in Xcode using the Mac Framework template will create a dynamic library. The iPhone does not support dynamic frameworks which is why it has beco...
How does the main() method work in C?
...ignatures for main, as well as variable-length argument lists, is one of those features.
Programmers noticed that they can pass extra arguments to a function, and nothing bad happens with their given compiler.
This is the case if the calling conventions are such that:
The calling function cleans...
Reference requirements.txt for the install_requires kwarg in setuptools setup.py file
...uirements.txt instead.
Alternatively, even if not advised, it is still possible to parse the requirements.txt file (if it doesn't refer any external requirements by URL) with the following hack (tested with pip 9.0.1):
install_reqs = parse_requirements('requirements.txt', session='hack')
This ...
ListCtrl 重绘（Custom Draw） - C/C++ - 清泛网 - 专注C/C++及内核技术
...ontrols DLL的版本是5.0。我已经对其在WinNT 4上进行了测试。系统要运行这些代码，它的common controls DLL的版本必须至少是4.71。但随着IE4 的发布，这已经不是问题了。(IE会夹带着这个DLL一起发布)
Custom Draw 基础
我将会尽我所能把Cust...
Why is address zero used for the null pointer?
...t as usable by the platform as an address - the C standard simply had to chose something to use to indicate a null pointer, and zero was chosen. I'm honestly not sure if other sentinel values were considered.
The only requirements for a null pointer are:
it's guaranteed to compare unequal to a ...
Why does the 260 character path length limit exist in Windows?
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Quoting this article https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#maximum-path-length-limitation
Maximum Path Length Limitation
In the Windows API (with some exceptions discussed in the following paragraphs), the maximum length f...
How do I disable the security certificate check in Python requests
...):
# Verification happens only once per connection so we need to close
# all the opened adapters once we're done. Otherwise, the effects of
# verify=False persist beyond the end of this context manager.
opened_adapters.add(self.get_adapter(url))
settings = ol...