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What's a concise way to check that environment variables are set in a Unix shell script?

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How can I check if a value is a json object?

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Make .gitignore ignore everything except a few files

...ctories !*/ # if the files to be tracked are in subdirectories !*/a/b/file1.txt !*/a/b/c/* share | improve this answer | follow | ...
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Best way to specify whitespace in a String.Split operation

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C# using streams

... 81 A stream is an object used to transfer data. There is a generic stream class System.IO.Stream, f...
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Is there a VB.NET equivalent of C# out parameters?

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Multiple variables in a 'with' statement?

... It is possible in Python 3 since v3.1 and Python 2.7. The new with syntax supports multiple context managers: with A() as a, B() as b, C() as c: doSomething(a,b,c) Unlike the contextlib.nested, this guarantees that a and b will have their __exit__()'s c...
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How do I get a file's directory using the File object?

... 174 In either case, I'd expect file.getParent() (or file.getParentFile()) to give you what you wan...
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Fastest Way of Inserting in Entity Framework

... 1014 To your remark in the comments to your question: "...SavingChanges (for each record)......
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Any reason to write the “private” keyword in C#?

... 171 AFAIK, private is the default everywhere in C# (meaning that if I don't write public, prote...