Package functions

Create custom Function objects, directly or by combining existing functions. More...

Packages
package	custom

Classes
class	AddNumbers
	Add two numbers with the Addition function. More...
class	ConstantUsage
	Basic usage of the ca.uqac.lif.cep.functions.Constant function. More...
class	CumulateAnd
	Use a cumulative processor to perform the conjunction of a stream of Boolean values. More...
class	FixedInterval
	Creates a compound function (a FunctionTree) that checks if a number lies between two fixed bounds. More...
class	FunctionBinary
	Apply a binary function on an input stream using the ApplyFunction processor. More...
class	FunctionChain
	Pipe multiple ApplyFunction processors to perform a more complex computation over a stream. More...
class	FunctionTreeUsage
	Use a FunctionTree to create a complex function. More...
class	FunctionUsage
	Show the basic usage of Function objects. More...
class	Interval
	Creates a compound function (a FunctionTree) that checks if a number lies between two other numbers. More...
class	IsPrime
	Create a custom unary function that checks if a number is prime. More...
class	Maximum
	Binary function that returns the maximum of two values. More...
class	PlaceholderUsage
	Use the ArgumentPlaceholder function to refer to the i-th argument of a function. More...
class	Polynomial
	Use an StreamVariable and a FunctionTree to create the polynomial function x2+3. More...

Detailed Description

Create custom Function objects, directly or by combining existing functions.

A particular aspect of BeepBeep 3 is the fact that functions are themselves objects. For example, the ApplyFunction applies a function (any function) to each incoming event. The actual function that it uses is chosen by passing to this processor a Function object.

BeepBeep and its supplemental palettes already define plenty of functions for specific uses. However, if no function suits your needs, it also provides simple means for creating your own function objects. This can be done in two ways:

• By creating a new class that inherits from Function or one of its descendents
• By combining (i.e. composing) existing functions in an expression. For example, the function f(x,y) = 2x + y is a function of two arguments, defined by composing existing functions, namely multiplication and addition. In BeepBeep, writing such an expression is done by creating an instance of a FunctionTreeUsage.

Author

Sylvain Hallé