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In Visual Basic a procedure argument can be declared to be optional by prefixing it with the Optional keyword. When the argument is omitted Visual Basic passes a special value to the procedure, called Missing in the table above, indicating that the argument is missing. Since the value could either be a supplied value or a special value, a ...
In programming languages (especially functional programming languages) and type theory, an option type or maybe type is a polymorphic type that represents encapsulation of an optional value; e.g., it is used as the return type of functions which may or may not return a meaningful value when they are applied.
Note that in this case some parameters are case-sensitive; exclusive options: f, g (denoted by the vertical bar) options with operands: n; exclusive options with operands: b, c; required arguments: req1, req2; optional argument opt1, which may be used with or without opt2 (marked optional within the group by using another set of square brackets)
When discussing the code inside the subroutine definition, the variables in the subroutine's parameter list are the parameters, while the values of the parameters at runtime are the arguments. For example, in C, when dealing with threads it is common to pass in an argument of type void* and cast it to an expected type:
VBA code interacts with the spreadsheet through the Excel Object Model, [33] a vocabulary identifying spreadsheet objects, and a set of supplied functions or methods that enable reading and writing to the spreadsheet and interaction with its users (for example, through custom toolbars or command bars and message boxes).
Common examples are the use of reserved values, where, for example, a function returning a positive number may return -1 to indicate failure, and sentinel values, most often used in tagged pointers. Sometimes, untagged unions are used to perform bit-level conversions between types, called reinterpret casts in C++.
In a programming language, an evaluation strategy is a set of rules for evaluating expressions. [1] The term is often used to refer to the more specific notion of a parameter-passing strategy [2] that defines the kind of value that is passed to the function for each parameter (the binding strategy) [3] and whether to evaluate the parameters of a function call, and if so in what order (the ...
Office XP and Office 2003 comes with an optional Unbind utility that, upon execution, extracts the contents of the Binder document to a directory of the user’s choosing. [7] This utility may be installed either through the Add or Remove Features functionality of Microsoft Office’s installation wizard or online from Microsoft Download Center.