63 lines
1.1 KiB
Racket
63 lines
1.1 KiB
Racket
#lang scribble/manual
|
|
@(require (for-label racket))
|
|
|
|
@title{BinaryOpFunction}
|
|
represent a binary operation on a function@section{categories}
|
|
Core
|
|
@section{related}
|
|
Classes/UnaryOpFunction, Classes/NAryOpFunction, Classes/BinaryOpStream, Classes/Pbinop, Overviews/Operators
|
|
|
|
@section{description}
|
|
|
|
|
|
Operating on functions instead of numbers, what results is not a result of the calculation, but a structure that represents that calculation.
|
|
|
|
@section{instanceMethods}
|
|
|
|
|
|
@section{private}
|
|
storeOn
|
|
|
|
@section{method}
|
|
value
|
|
|
|
Executes each of the operand functions and then performs the selector on the result.
|
|
|
|
@section{method}
|
|
valueArray
|
|
|
|
the same as link::#-value::
|
|
|
|
@section{examples}
|
|
|
|
|
|
|
|
@racketblock[
|
|
// example
|
|
a = 5 + 7; // result is 12.
|
|
a = { b } + 7; // result is a BinaryOpFunction
|
|
b = 5;
|
|
a.value; // now it is evaluated, and the result is calculated
|
|
b = 8;
|
|
a.value; // again, with a different value.
|
|
::
|
|
|
|
]
|
|
|
|
@racketblock[
|
|
// sound example
|
|
(
|
|
var a = { 19.rand };
|
|
var b = { [5, 8, 9].choose };
|
|
var c = a + b;
|
|
fork {
|
|
15.do {
|
|
(instrument: \default, note: [c.value, a.value]).play;
|
|
0.3.wait;
|
|
}
|
|
}
|
|
)
|
|
::
|
|
]
|
|
|
|
|