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Efficiency of premature return in a function
This is a situation I encounter frequently as an inexperienced programmer and am wondering about particularly for an ambitious, speed-intensive project of mine I'm trying to optimize. For the major C-like languages (C, objC, C++, Java, C#, etc) and their usual compilers, will these two functions ru...
How can I randomize the lines in a file using standard tools on Red Hat Linux?
...iner you get!
perl -MList::Util -e 'print List::Util::shuffle <>'
It uses a module, but the module is part of the Perl code distribution. If that's not good enough, you may consider rolling your own.
I tried using this with the -i flag ("edit-in-place") to have it edit the file. The docume...
How to output in CLI during execution of PHP Unit tests?
When running a PHPUnit test, I would like to be able to dump output so I can debug one or two things.
17 Answers
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How should the ViewModel close the form?
I'm trying to learn WPF and the MVVM problem, but have hit a snag.
This question is similar but not quite the same as this one (handling-dialogs-in-wpf-with-mvvm) ...
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How can I restart a Java application?
...
Of course it is possible to restart a Java application.
The following method shows a way to restart a Java application:
public void restartApplication()
{
final String javaBin = System.getProperty("java.home") + File.separator + "b...
Calculate age given the birth date in the format YYYYMMDD
...can I calculate an age in years, given a birth date of format YYYYMMDD? Is it possible using the Date() function?
40 Answ...
.gitignore and “The following untracked working tree files would be overwritten by checkout”
So I added a folder to my .gitignore file.
29 Answers
29
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How to run a single RSpec test?
...nfig.filter_run_when_matching :focus
end
And then add a focus tag to the it, context or describe to run only that block:
it 'runs a test', :focus do
...test code
end
RSpec documentation:
https://www.rubydoc.info/github/rspec/rspec-core/RSpec/Core/Configuration#filter_run_when_matching-instan...
How should equals and hashcode be implemented when using JPA and Hibernate
...ss's equals and hashcode be implemented in Hibernate? What are the common pitfalls? Is the default implementation good enough for most cases? Is there any sense to use business keys?
...
Where and why do I have to put the “template” and “typename” keywords?
...r can yield vastly different interpretations depending on what t means. If it's a type, then it will be a declaration of a pointer f. However if it's not a type, it will be a multiplication. So the C++ Standard says at paragraph (3/7):
Some names denote types or templates. In general, whenever a...