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How to clone a case class instance and change just one field in Scala?
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324
case classcomes with a copy method that is dedicated exactly to this usage:
val newPersona = ...
Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...enuBar.add(newMenu);
29 newMenu.add(action1);
30 }
31
32 }
可以看出，我们通过创建cn.blogjava.youxia.actions.Action1类的实例来创建一个菜单项，然后把它加入到菜单newMenu中，然后再把newMenu加入menuBar中，整个过程很容易理解。那...
Should I be concerned about excess, non-running, Docker containers?
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edited Aug 12 '16 at 10:32
answered Jul 9 '14 at 7:58
zer...
Is there a javadoc tag for documenting generic type parameters?
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answered Jan 6 '10 at 20:32
Dave DiFrancoDave DiFranco
1,52799 silver badges99 bronze badges
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Finding the path of the program that will execute from the command line in Windows
...ist is the one that will execute.
C:\> where notepad
C:\Windows\System32\notepad.exe
C:\Windows\notepad.exe
According to this blog post, where.exe is included with Windows Server 2003 and later, so this should just work with Vista, Win 7, et al.
On Linux, the equivalent is the which command,...
Maximum MIMEType Length when storing type in DB
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edited Nov 8 '17 at 9:32
answered Mar 13 '09 at 17:28
a...
How would one call std::forward on all arguments in a variadic function?
...arams)
– UncleBens
May 12 '10 at 17:32
87
On talk like a pirate day I use void f(Ar&& ......
How do you search an amazon s3 bucket?
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32
S3 doesn't have a native "search this bucket" since the actual content is unknown - also, since...
What is float in Java?
...ble. double is a 64-bit precision IEEE 754 floating point, while floatis a 32-bit precision IEEE 754 floating point. As a float is less precise than a double, the conversion cannot be performed implicitly.
If you want to create a float, you should end your number with f (i.e.: 3.6f).
For more exp...
MongoDB aggregation framework match OR
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Balthazar
32.8k1010 gold badges7373 silver badges100100 bronze badges
answered Jun 3 '13 at 18:40
SammayeSammay...