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What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]
Two questions about using a question mark "?" and colon ":" operator within the parentheses of a print function: What do they do? Also, does anyone know the standard term for them or where I can find more information on their use? I've read that they are similar to an 'if' 'else' statement.
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How to use Git?
I am an engineering student who spends most of his spare time watching TV rather than coding. So basically I have zero experience with any kind of version control system. My understanding is somehow they make distribution of projects easier.
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How to get the filename without the extension from a path in Python?
...xt.zip.asc")[0])
Prints:
/path/to/some/file.txt.zip
See other answers below if you need to handle that case.
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Can overridden methods differ in return type?
...re specific return type. That is, as long as the new return type is assignable to the return type of the method you are overriding, it's allowed.
For example:
class ShapeBuilder {
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public Shape build() {
....
}
class CircleBuilder extends ShapeBuilder{
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@Override
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Linq code to select one item
I find myself writing a lot of code like this to select one item that matches
7 Answers
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It is more efficient to use if-return-return or if-else-return?
...nt function, the two forms are equivalent (although the second one is arguably more readable than the first).
The efficiency of both forms is comparable, the underlying machine code has to perform a jump if the if condition is false anyway.
Note that Python supports a syntax that allows you to use...
Using relative URL in CSS file, what location is it relative to?
When defining something like a background image URL in a CSS file, when using a relative URL, where is it relative to? For example:
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Copy file remotely with PowerShell
...hell script that I want to run from Server A.
I want to connect to Server B and copy a file to Server A as a backup.
5 Ans...
Dynamic instantiation from string name of a class in dynamically imported module?
In python, I have to instantiate certain class, knowing its name in a string, but this class 'lives' in a dynamically imported module. An example follows:
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Retrieve CPU usage and memory usage of a single process on Linux?
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ps -p <pid> -o %cpu,%mem,cmd
(You can leave off "cmd" but that might be helpful in debugging).
Note that this gives average CPU usage of the process over the time it has been running.
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