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Test if a variable is set in bash when using “set -o nounset”
The following code exits with a unbound variable error. How to fix this, while still using the set -o nounset option?
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What is the “volatile” keyword used for?
...of the scope of the program itself. The compiler will then avoid any optimisations that may result in problems if the variable changes "outside of its control".
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Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
...unwrapped then why create an optional in the first place?
For example, why is this:
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Database development mistakes made by application developers [closed]
What are common database development mistakes made by application developers?
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Is there any reason to use a synchronous XMLHttpRequest?
...synchronous requests with XMLHttpRequest but obviously the fact that there is the ability to do synchronous requests indicates there might be a valid reason to do so. So what might that valid reason be?
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Most efficient way to determine if a Lua table is empty (contains no entries)?
What's the most efficient way to determine if a table is empty (that is, currently contains neither array-style values nor dict-style values)?
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Why should C++ programmers minimize use of 'new'?
...n Stack Overflow question Memory leak with std::string when using std::list<std::string> , and one of the comments says this:
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SQL left join vs multiple tables on FROM line?
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The old syntax, with just listing the tables, and using the WHERE clause to specify the join criteria, is being deprecated in most modern databases.
It's not just for show, the old syntax has the possibility of being ambiguous when you use both INNER ...
What is an AngularJS directive?
... AngularJS documentation and several tutorials, and I have been quite surprised at how unapproachable the documentation is.
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What is Bootstrap?
... a download section and a few words after that. Nothing that explains what is it for... I just understood that it is a front-end helper. I have tried to find something by Googling, but found nothing specific. Everything I found is related to the computer science definition.
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