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What is the purpose of “&&” in a shell command?
...is the logical or, and also ; which is just a separator which doesn't care what happend to the command before.
$ false || echo "Oops, fail"
Oops, fail
$ true || echo "Will not be printed"
$
$ true && echo "Things went well"
Things went well
$ false && echo "Will not be printed"...
What does the term “porcelain” mean in Git?
The term "porcelain" appears occasionally in the Git documentation. What does it mean?
9 Answers
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In Windows Azure: What are web role, worker role and VM role?
...cation in Windows Azure, so I created a web role. I actually want to know what these roles are for. What is their significance coding wise or storage wise?
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What is the difference between ng-app and data-ng-app?
I have begun to learn about AngularJS and am confused about what the differences are between the ng-app and data-ng-app directives.
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What is the difference between a cer, pvk, and pfx file?
What is the difference between a cer, pvk, and pfx file? Also, which files do I keep and which am I expected to give to my counter-parties?
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What is PECS (Producer Extends Consumer Super)?
...ing>, Collection<? super Thing> can always hold a Thing no matter what the actual parameterized type is. Here you don't care what is already in the list as long as it will allow a Thing to be added; this is what ? super Thing guarantees.
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What does 'useLegacyV2RuntimeActivationPolicy' do in the .NET 4 config?
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What if I've added this to both the config for my application and a config for my UnitTest project and I am still receiving a file load error when running tests. Should I post a new question?
– CodenameC...
What does {0} mean when initializing an object?
When {0} is used to initialize an object, what does it mean? I can't find any references to {0} anywhere, and because of the curly braces Google searches are not helpful.
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What does “Git push non-fast-forward updates were rejected” mean?
... push command, you should only do so if you are absolutely certain this is what you want to do.
Force-pushes can cause issues for other users that have fetched the remote branch, and is considered bad practice. When in doubt, don’t force-push.
Git cannot make changes on the remote like a fas...
Regex doesn't work in String.matches()
...-z]");
Matcher m = p.matcher(inputstring);
if (m.find())
// match
If what you want is indeed to see if an input only has lowercase letters, you can use .matches(), but you need to match one or more characters: append a + to your character class, as in [a-z]+. Or use ^[a-z]+$ and .find().
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