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What is the 'instanceof' operator used for in Java?
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instanceof keyword is a binary operator used to test if an object (instance) is a subtype of a given Type.
Imagine:
interface Domestic {}
class Animal {}
class Dog extends Animal implements Domestic {}
class Cat extends Animal implements Domestic ...
搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
搭建高可用mongodb集群（三）—— 深入副本集内部机制在上一篇文章《搭建高可用mongodb集群（二）—— 副本集》介绍了副本集的配置，这篇文章深入研究一下副本集的内部机制。还是带着副本集的 在上一篇文章《搭建高可用mo...
Unit testing that events are raised in C# (in order)
I have some code that raises PropertyChanged events and I would like to be able to unit test that the events are being raised correctly.
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Is there a shortcut to move between header and source file in VC++?
This is a feature I have grown accustomed to in Eclipse ( Ctrl + Tab ). Is there an equivalent in Visual C++?
16 Answers
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Logging uncaught exceptions in Python
...ical implication of this is that in your code you can override the default behavior of sys.excepthook to do whatever you want (including using logging.exception).
As a straw man example:
>>> import sys
>>> def foo(exctype, value, tb):
... print 'My Error Information'
... pr...
Replace whole line containing a string using Sed
...o make the changes in-place. For example, using GNU sed:
sed -i '/TEXT_TO_BE_REPLACED/c\This line is removed by the admin.' /tmp/foo
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How to add a new audio (not mixing) into a video using ffmpeg?
...s preserved and the process is fast.
If your input audio format is compatible with the output format then change -c:v copy to -c copy to stream copy both the video and audio.
If you want to re-encode video and audio then remove -c:v copy / -c copy.
The -shortest option will make the output the sa...
Automatic vertical scroll bar in WPF TextBlock?
I have a TextBlock in WPF. I write many lines to it, far exceeding its vertical height. I expected a vertical scroll bar to appear automatically when that happens, but it didn't. I tried to look for a scroll bar property in the Properties pane, but could not find one.
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Get the distance between two geo points
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How do I import global modules in Node? I get “Error: Cannot find module ”?
I am trying to setup Node on Mac OSX Lion. It all seems to work ok, but I can't seem to import anything modules from my global modules folder. I get the error,
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