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Concatenating null strings in Java [duplicate]
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This is behavior specified in the Java API's String.valueOf(Object) method. When you do concatenation, valueOf is used to get the String representation. There is a special case if the Object is null, in which case the string "null" is used.
public static Strin...
Strings in a DataFrame, but dtype is object
...oduction system where continuous package upgrades are necessary, and where API breakage cause an unacceptable maintenance burden, then sure, pay close attention to the word "experimental", but if you're using pandas to perform exploratory analyses in scripts whose life time do not increase a work da...
Reading 64bit Registry from a 32bit application
... AFAIK that's not possible with the Registry class but only when using the API directly.
This might help to get you started.
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When should one use final for method parameters and local variables?
... final fields.
Consider but use judiciously:
Final classes - Framework/API design is the only case where I consider it.
Final methods - Basically same as final classes. If you're using template method patterns like crazy and marking stuff final, you're probably relying too much on inheritance a...
#pragma once vs include guards? [duplicate]
...e, or to rename one of the headers. The names of headers are part of your API contract, so renaming is probably not an option.
(The short version of why this is unfixable is that neither the Unix nor the Windows filesystem API offer any mechanism that guarantees to tell you whether two absolute pa...
How to call asynchronous method from synchronous method in C#?
...d).Result;
*Update 4/14/2014: In more recent versions of the library the API is as follows:
var result = AsyncContext.Run(MyAsyncMethod);
(It's OK to use Task.Result in this example because RunTask will propagate Task exceptions).
The reason you may need AsyncContext.RunTask instead of Task.Wait...
Detect 7 inch and 10 inch tablet programmatically
...lue in both portrait and landscape on my Nexus 7 (600dp). It was added in API level 13.
– Jonik
Dec 11 '13 at 10:19
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BIO与NIO、AIO的区别(这个容易理解) - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
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三、AIO
与NIO不同，当进行读写操作时，只须直接调用API的read或write方法即可。这两种方法均为异步的，对于读操作而言，当有流可读取时，操作系统会将可读的流传入read方法的缓冲区，并通知应用程序；对于写操作而言，当...
Why is spawning threads in Java EE container discouraged?
...is now a standard, and correct way to create threads with the core Java EE API. By using Concurrency Utils, you ensure that your new thread is created, and managed by the container, guaranteeing that all EE services are available. Examples here and here
– Chris Ritchie
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Best practices/guidance for maintaining assembly version numbers
...sion numbers also mean different things depending on the context, is it an API, Web App, etc.
Major.Minor.Build.Revision
Revision This is the number taken from source control to identify what
was actually built.
Build This is an ever increasing number that can be used to find a
particular build ...