... It depends what you are looking for, if you are just looking to see if it is empty just use empty as it checks whether it is set as well, if you want to know whether something is set or not use isset. Empty checks if the var...

...generic way to have a single line (or anonymous delegate) of code execute with a timeout. 7 Answers ...

I'm a bit confused with JavaScript's delete operator. Take the following piece of code: 11 Answers ...

... Currently, no, it doesn't look like it is possible to center a view in the superview using only VFL. It is, however, not that difficult to do it using a single VFL string and a single extra constraint (per axis): VFL: "|-(>=20)-[view]-(...

... Add a Resource file to your project (you can call it "strings.resx") by doing the following: Right-click Properties in the project, select Add -> New Item... in the context menu, then in the list of Visual C# Items pick "Resources file" and name it strings.resx. Add a str...

I have heard that the Liskov Substitution Principle (LSP) is a fundamental principle of object oriented design. What is it and what are some examples of its use? ...

...le loop, otherwise you would not be asking the question, because declaring it inside the while loop would not be an option, since it would not compile. So, since str is not used outside the loop, the smallest possible scope for str is within the while loop. So, the answer is emphatically that str ...

...as in the "opt" directory)? I commonly see this directory in Unix systems with development tools inside. 5 Answers ...

I was working with a new C++ developer a while back when he asked the question: "Why can't variable names start with numbers?" ...

...n your user code. As you say, when the variable is declared on the stack, its destructor is automatically called when it goes out of scope, which is your main tool for tracking resource lifetime and avoiding leaks. So in general, every time you need to allocate a resource, whether it's memory (by ...