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What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
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General numeric sort compares the numbers as floats, this allows scientific notation eg 1.234E10 but is slower and subject to rounding error (1.2345678 could come after 1.2345679), numeric sort is just a regular alphabetic sort that knows 10 comes after 9.
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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() {
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}
class CircleBuilder extends ShapeBuilder{
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@Override
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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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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...
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.
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Can someone explain the traverse function in Haskell?
I am trying and failing to grok the traverse function from Data.Traversable . I am unable to see its point. Since I come from an imperative background, can someone please explain it to me in terms of an imperative loop? Pseudo-code would be much appreciated. Thanks.
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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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How do I use extern to share variables between source files?
I know that global variables in C sometimes have the extern keyword. What is an extern variable? What is the declaration like? What is its scope?
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What's the actual use of 'fail' in JUnit test case?
...e:
Since JUnit4, there is a more elegant way to test that an exception is being thrown:
Use the annotation @Test(expected=IndexOutOfBoundsException.class)
However, this won't work if you also want to inspect the exception, then you still need fail().
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Counter increment in Bash loop not working
...script where I am running a loop and want to maintain a COUNTER . I am unable to figure out why the counter is not updating. Is it due to subshell thats getting created? How can I potentially fix this?
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