XPath find if node exists
Using a XPath query how do you find if a node (tag) exists at all? For example if I needed to make sure … Read more
expression
How to make Regular expression into non-greedy?
I’m using jQuery. I have a string with a block of special characters (begin and end). I want get the text from that … Read more
Combining two expressions (Expression)
I have two expressions of type Expression<Func<T, bool>> and I want to take to OR, AND or NOT of these and get a … Read more
What is this smiley-with-beard expression: “”?
I came across the following program, which compiles without errors or even warnings: int main(){ <:]{%>; // smile! } Live example. What does … Read more
What is the difference between an expression and a statement in Python?
In Python, what is the difference between expressions and statements? 15 Answers 15
Expression Versus Statement
I’m asking with regards to c#, but I assume its the same in most other languages. Does anyone have a good definition of … Read more
What are rvalues, lvalues, xvalues, glvalues, and prvalues?
In C++03, an expression is either an rvalue or an lvalue. In C++11, an expression can be an: rvalue lvalue xvalue glvalue prvalue … Read more
Insert Dimensions to complete Expression/ReferenceType
Insert Dimensions to complete Expression/ReferenceType