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How should I have explained the difference between an Interface and an Abstract class?
...Implement the same default behavior here
// that is shared by all subclasses.
}
// Each subclass needs to provide their own implementation of this only:
public abstract void checkDBforUser();
}
Now in each child class, we only need to implement one method - the method that i...
Can Java 8 code be compiled to run on Java 7 JVM?
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No, I don't think it will. Java has a small share of the desktop market, but keeps that little share in a pretty tight grip. But it does hamper the adoption of new versions and features. I will not be able to use Java 8 features in the code I write for quite some t...
How to draw vertical lines on a given plot in matplotlib?
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Calling axvline in a loop, as others have suggested, works, but can be inconvenient because
Each line is a separate plot object, which causes things to be very slow when you have many lines.
When you create the legend each li...
Concatenate multiple files but include filename as section headers
... Of note, passing -n to grep also yields line numbers which allows you to write simple linters with pinpointing that could be picked up by, e.g., emacs.
– DepressedDaniel
Mar 13 '17 at 3:23
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Maven: Failed to read artifact descriptor
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You can always try mvn -U clean install
-U forces a check for updated releases and snapshots on remote repositories.
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How to get start and end of day in Javascript?
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@MartynDavis when all is normal operation, usually about 0-2 ticks happen in between but it depends on how busy the cpu is so then it makes sense to do that if you are worried about 1 tick precision.
– Jason Sebring
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Does const mean thread-safe in C++11?
...:
[17.6.5.9/1]
This section specifies requirements that implementations shall meet to prevent data races (1.10). Every standard library function shall meet each requirement unless otherwise specified. Implementations may prevent data races in cases other than those specified below.
[17.6.5.9/3]
A C...
SQL Update with row_number()
...able and made the CTE look as if it was a recursive CTE, because it essentially referenced itself. A recursive CTE must have a specific structure which requires the use of the UNION ALL set operator.
Instead, you could just have given the CTE a different name as well as added the target column to i...
Interview questions: WPF Developer [closed]
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Personally I would sit them down in front of a standard developer build machine and ask them to complete some task. No questions, just see what their code is like after a couple of hours (or more if the task is longer).
I have had...
Passing ssh options to git clone
...D takes precedence over $GIT_SSH, and is
interpreted by the shell, which allows additional arguments to be
included.
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