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Difference between exit(0) and exit(1) in Python
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Note that according to the docs, exit() is added by the site module, and should not be used by programs. Instead, use sys.exit(), or even raise SystemExit, if you don't want to import another module.
– daviewales
Aug 22 '19 at 5:00
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What is the exact meaning of IFS=$'\n'?
... linebreak - it's the letter n (in the first case) or a backslash followed by the letter n (in the other two cases).
$'somestring' is a syntax for string literals with escape sequences. So unlike '\n', $'\n' actually is a linebreak.
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Uses for Optional
...it's rather clumsy. Suppose you have a method that takes a string followed by an optional second string. Accepting an Optional as the second arg would result in code like this:
foo("bar", Optional.of("baz"));
foo("bar", Optional.empty());
Even accepting null is nicer:
foo("bar", "baz");
foo("bar...
Using only CSS, show div on hover over
...inside the same parent display:block. It might be a better idea to select by .class-name or by #id. Otherwise, good post.
– Nate
Jun 6 '12 at 22:59
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What is the relationship between the docker host OS and the container base image OS?
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As mentioned by BraveNewCurrency, the only relationship between the host OS and the container is the Kernel.
It is one of the main difference between docker and 'regular' virtual machines, there is no overhead, everything takes place dir...
How to avoid null checking in Java?
... statement throws an Error (AssertionError) if the condition is not true. By default, Java ignores assertions. You can enable assertions by passing the option -ea to the JVM. You can enable and disable assertions for individual classes and packages. This means that you can validate code with the...
How can I view an old version of a file with Git?
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Doing this by date looks like this:
git show HEAD@{2013-02-25}:./fileInCurrentDirectory.txt
Note that HEAD@{2013-02-25} means "where HEAD was on 2013-02-25" in this repository (using the reflog), not "the last commit before 2013-02-2...
How to get current page URL in MVC 3
...lugin on a blog I am building. It has some FBXML tags that are interpreted by the facebook javascript that is referenced on the page.
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AngularJS access scope from outside js function
... @MarcM. I think it has to do with Angular's scope recreation. By the time you're using the change function, the previous scope the global var was pointing to may no longer exist (due to the recreation).
– dk123
Dec 14 '13 at 3:43
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How to stop C++ console application from exiting immediately?
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The solution by James works for all Platforms.
Alternatively on Windows you can also add the following just before you return from main function:
system("pause");
This will run the pause command which waits till you press a key and...