How to use actual parameter in a sentence? Find typical usage patterns (collocations)/phrases/context for "actual parameter" and check conjugation/comparative form for "actual parameter". Mastering all the usages of "actual parameter" from sentence examples published by news publications.
Bind-class `LIKE` causes a parameter to be passed by reference if possible and by value if not (e.g., if the actual parameter is a pure value, or a variable to which a type conversion must be applied). Bind-class `UNEVAL` specifies that an abstract syntax tree for the actual parameter is to be passed to the formal parameter; this provides extraordinary flexibility for programmers to invent their own notations, with their own evaluation semantics, for certain procedure parameters. Bind-class `LISTED` is similar to `UNEVAL`, but provides a capability similar to that of varargs in C: the `LISTED` bind-class can only appear in the last formal parameter of the procedure, and that formal parameter is bound to a list of abstract syntax tree representations, one for each remaining actual parameter.
|
|
The lambda abstraction operator, λ, takes a formal parameter variable and a body expression. When evaluated the formal parameter variable is identified with the value of the actual parameter. Variables in a lambda expression may either be "bound" or "free". Bound variables are variable names that are already attached to formal parameter variables in the expression.
|
|
In computer programming, two notions of parameter are commonly used, and are referred to as parameters and arguments—or more formally as a formal parameter and an actual parameter. For example, in the definition of a function such as : y = f(x) = x + 2, x is the formal parameter (the parameter) of the defined function. When the function is evaluated for a given value, as in :f(3): or, y = f(3) = 3 + 2 = 5, 3 is the actual parameter (the argument) for evaluation by the defined function; it is a given value (actual value) that is substituted for the formal parameter of the defined function. (In casual usage the terms parameter and argument might inadvertently be interchanged, and thereby used incorrectly.) These concepts are discussed in a more precise way in functional programming and its foundational disciplines, lambda calculus and combinatory logic.
|
|
It is also possible to have 'constrained' formal parameters, for which the actual parameter must inherit from a given class, the "constraint". For example, in class HASH_TABLE [G, KEY -> HASHABLE] a derivation `HASH_TABLE [INTEGER, STRING]` is valid only if `STRING` inherits from `HASHABLE` (as it indeed does in typical Eiffel libraries). Within the class, having `KEY` constrained by `HASHABLE` means that for `x: KEY` it is possible to apply to `x` all the features of `HASHABLE`, as in `x.hash_code`.
|
|
The concept of slicing was surely known even before the invention of compilers. Slicing as a language feature probably started with FORTRAN (1957), more as a consequence of non-existent type and range checking than by design. The concept was also alluded to in the preliminary report for the IAL (ALGOL 58) in that the syntax allowed one or more indices of an array element (or, for that matter, of a procedure call) to be omitted when used as an actual parameter. Kenneth Iverson's APL (1957) had very flexible multi- dimensional array slicing, which contributed much to the language's expressive power and popularity.
|
|
Some languages (such as Algol) have a formal notion of "upgrading" or "widening" or "promotion", whereby a procedure that expects say a double-precision parameter may be invoked with it as a single precision variable, and in this case the compiler generates code that stores the single precision variable into a temporary double-precision variable which becomes the actual parameter. This however changes the parameter passing mechanism to copy-in, copy-out which may lead to subtle differences in behaviour. Far less subtle are the consequences when a procedure receives the address of a single precision variable when it expects a double precision parameter, or other size variations. When within the procedure the parameter's value is read, more storage will be read than that of its given parameter and the resulting value is unlikely to be an improvement.
|
|
No results under this filter, show 6 sentences.