(Function | Operator | Map | Mapping | Transformation | Method | Rule | Task | Subroutine)
Table of Contents
About
Section about computable function.
A function is a callable unit that may be called:
- a procedure,
- a subrontine
- a routine,
- a method (belong to an object)
- a subprogram
- a task
- a map
- a mapping
- a transformation
- a macro
A function is computable if there exists an algorithm that can do the job of the function.
A function is a reusable block (section|chunk) of code written that:
- accepts arguments as input,
- performs a specific task,
- and returns some other information as output.
Catalog and type of function that you can meet in any development language.
See also:
In real life, all functions are continuous and smooth.
The clarity of examples, and the software’s decipherability and debuggability in the real world, are likely far more important. Form must communicate function.
Functions that take many arguments are obviously bad design. Named properties can be enhanced by using method chaining and single-argument getter-setter methods.
Function property. See (Function|Operator) - Algebraic (Laws|properties) - Axioms
The concept of function is defined as a special kind of binary relation.
Articles Related
Syntax
input -> Rule -> Output
where rule:
Declaration
A function declaration has generally:
Execution
Execution of the function begins with the first statement and continues until it encounters a return statement or reaches the end of a function that has no results. Control and any results are then returned to the caller.
Parallel
Type
User Defined Functions (UDF)
Analytics Function
Time serie function
Aggregate functions
Aggregate functions return a single value, calculated from values in a column.
Scalar functions
Deterministic function
Did they return always the same result ? deterministic properties
Documentation / Reference
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