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What are the rules for calling the superclass constructor?
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Base class constructors are automatically called for you if they have no argument. If you want to call a superclass constructor with an argument, you must use the subclass's constructor initialization list. Unlike Java, C++ supports multiple inheritance (for better or worse), so ...
How to set a selected option of a dropdown list control using angular JS
... a selected option of a dropdown list control using angular JS. Forgive me if this is ridiculous but I am new with Angular JS
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What is the difference between atomic / volatile / synchronized?
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You are specifically asking about how they internally work, so here you are:
No synchronization
private int counter;
public int getNextUniqueIndex() {
return counter++;
}
It basically reads value from memory, increments it and pu...
Visual Studio Expand/Collapse keyboard shortcuts [duplicate]
In Visual Studio, if I have a code file open, I can press CTRL + M or CTRL + M + O to collapse all code blocks, regions, namespaces, etc.
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How to automatically start a service when running a docker container?
...ld phase and stops after the build is completed. Instead, you need to specify the command when the container is started using the CMD or ENTRYPOINT commands like below:
CMD mysql start
Secondly, the docker container needs a process (last command) to keep running, otherwise the container will exi...
Use of alloc init instead of new
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There are a bunch of reasons here: http://macresearch.org/difference-between-alloc-init-and-new
Some selected ones are:
new doesn't support custom initializers (like initWithString)
alloc-init is more explicit than new
General opinion seems to be that you should use whatever you...
Mockito + PowerMock LinkageError while mocking system class
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Still needed to add some more paths but you saved my life man! @PowerMockIgnore({"javax.management.*", "org.apache.http.conn.ssl.*", "com.amazonaws.*", "javax.net.ssl.*","com.sun.*"})
– Francisco López-Sancho
Aug 4 '16 at 12:29
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How can I delete multiple lines in vi?
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I find this easier
Go VISUAL mode Shift+v
Select lines
d to delete
https://superuser.com/questions/170795/how-can-i-select-and-delete-lines-of-text-in-vi
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Base64 encoding and decoding in client-side Javascript
...tions.
For server-side JavaScript (Node), you can use Buffers to decode.
If you are going for a cross-browser solution, there are existing libraries like CryptoJS or code like:
http://ntt.cc/2008/01/19/base64-encoder-decoder-with-javascript.html
With the latter, you need to thoroughly test the f...
What is the purpose of the : (colon) GNU Bash builtin?
...e case for some ancient Bourne shells). This leaves the else clause of the if statement as the only means for branching based on exit status:
if command; then :; else ...; fi
Since if requires a non-empty then clause and comments don't count as non-empty, : serves as a no-op.
Nowadays (that is: ...