Top "Expression" questions

Combination of several programming symbols and values intending to produce a result

What is the purpose of the unary plus (+) operator in C?

In C, it's legal to write something like: int foo = +4; However, as far as I can tell, the unary plus (+) …

c expression evaluation unary-operator
Qlikview, how to create an expression which does not change with listbox selection?

Example, I have table below.. Week, Quantity 1, 10 1, 15 1, 10 2, 20 2, 30 3, 10 3, 50 I also have a list box for 'Week' which is current selected on …

expression qlikview
Angularjs ngDisabled comparison expression not evaluating correctly

I am attempting to have a button be enabled or disabled in an angularjs app based on whether a comparison …

javascript angularjs button expression disabled-input
Arithmetic expressions in Bash?

I had used several ways to do some simple integer arithmetic in BASH (3.2). But I can't figure out the best (…

bash floating-point math expression
How to check if two Expression<Func<T, bool>> are the same

Is it possible to find out if two expressions are the same? Like given the following four expressions: Expression<…

c# expression equality
Where is the expression window in Xcode 4?

How can I add an expression to watch in Xcode 4? This should be very obvious, but it is not. It …

debugging xcode4 expression watch
In R, how do I replace a string that contains a certain pattern with another string?

I'm working on a project involving cleaning a list of data on college majors. I find that a lot are …

string r expression gsub
C#: An item with the same key has already been added, when compiling expression

Ok, here's a tricky one. Hopefully there is an expression guru here who can spot what I am doing wrong …

c# exception lambda expression expression-trees
Expression references a method that does not belong to the mocked object

I have an api service that calls another api service. When I set up the Mock objects, it failed with …

c# linq unit-testing expression moq
The LINQ expression node type 'Invoke' is not supported in LINQ to Entities in entity framework

can anyone help me out in solving my issue. I am using the code given below: public IEnumerable<InvoiceHeader&…

c# linq entity-framework expression predicate