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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，所以我们首先创建一个名为YYGoogleFinancialRTD的类库：
3.1 创建实体类对象
要将我们的请求的结果保存起来，必须创建一个实体类，来保存TopicID，请求的指标，股票代码，以及返回值的信息，这样再刷新的时候可以根据这些...
How do CDI and EJB compare? interact?
... as MVC framework (just example), and you are limited here, even using EJB 3.1 - you can't use @EJB annotation in Struts action, it is not managed by container. But when you add Struts2-CDI plugin, you can write there @Inject annotation for the same thing (so no more JNDI lookup needed). This way it...
Releasing memory in Python
... easiest way to create a child process is with concurrent.futures (or, for 3.1 and earlier, the futures backport on PyPI):
with concurrent.futures.ProcessPoolExecutor(max_workers=1) as executor:
result = executor.submit(func, *args, **kwargs).result()
If you need a little more control, use th...
What is the difference between a 'closure' and a 'lambda'?
...notherfunc's environment and can access variables inside of it. In Python 3.1+, mutation works too when using the nonlocal keyword.
Another important point - func will continue to close over anotherfunc's environment even when it's no longer being evaluated in anotherfunc. This code will also work...
Is floating point math broken?
...ent at a time (radix 4) would be 2+2= 4 bits (plus a few optional bits).
3.1 Division Rounding Error: Approximation of Reciprocal
What reciprocals are in the quotient selection table depend on the division method: slow division such as SRT division, or fast division such as Goldschmidt division; ...
Auto Scale TextView Text to Fit within Bounds
...t();
}
}
Warning. There is an important fixed bug affecting Android 3.1 - 4.04 causing all AutoResizingTextView widgets not to work. Please read: https://stackoverflow.com/a/21851157/2075875
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Webfonts or Locally loaded fonts?
...ternet Explorer (IE 4+)
TrueType and OpenType: Traditional formats (Safari 3.1+, FF 3.5+, Opera 10+)
WOFF: New standard for web fonts (FF 3.6+, Chrome 5+)
SVG: IOS <4.2
More information at The @Font-Face Rule And Useful Web Font Tricks
All of these services support the major font formats. With...
Java EE 6 @javax.annotation.ManagedBean vs. @javax.inject.Named vs. @javax.faces.ManagedBean
...uture requirements and they made EJB 1.0 and then 2.0 and then 3.0 and now 3.1 but EJB's target was for just some requirements (transaction, distributed component model, etc).
At the same time (in parallel) they realized that they need to support JSF too, then they made JSF managed beans and anothe...
What is an optional value in Swift?
...he provided constant and executes the block. In Xcode 8.3 and later (Swift 3.1), trying to print an optional like this will cause a useless warning. Use the optional's debugDescription to silence it:
print("\(mealPreference.debugDescription)")
What are optionals for?
Optionals have two use cases:
...
Objective-C categories in static library
...this? I'm working on an iOS project using Xcode 4.3.2, compiling with LLVM 3.1 and this was still an issue for me.
– Ashley Mills
Apr 12 '12 at 10:02
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