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jstrigger

Execute Javascript instructions sequentially

Description

The jstrigger object is similar to the trigger object, except that typed-in arguments within parentheses are passed to the Javascript evaluator. For more information on the Max implementation of Javascript, refer to the Javascript in Max manual. For complete information about Javascript itself, consult a reference book such as Javascript: The Definitive Guide by David Flanagan, published by O'Reilly.

Arguments

Name Type Opt Description
sequential-Javascript-instructions numbers symbols or expressions The arguments to the jstrigger object may be either constants or expressions. Constants are numbers or symbols. For each constant, an outlet will be created, and the constant value will be sent out the corresponding outlet when the object receives a message in its left inlet. For example, jstrigger with the arguments ready set 74 would send 74 out the right outlet, followed by set out the middle outlet, followed by ready out the left outlet.

Expressions are Javascript expressions contained within parentheses. You can include more than one Javascript statement can be contained within the parentheses, but you must separate the statements by semicolons (;). A semicolon after the last statements is not required, and the word return is not required either. To return a list, you can either create an array object or place items in square brackets separated by commas. Javascript allows you to enter expressions between the commas. See the Examples section.

For each expression, an outlet will be created, and the value of the expression will be sent out the corresponding outlet when the jstrigger object receives a message in its left inlet.

Note that any use of semicolons or commas in an object box require a preceding backslash (\) character, otherwise you will see the following error message in the Max window and the object will not be created:

* error: object box has comma or semicolon

In addition, it is strongly recommended to use single quotes (') rather than double quotes to define string literals. The use of double quotes can produce unexpected results in jstrigger when the object is saved and recreated in a patcher.

Messages

bang The most recently stored values for each argument are assigned to the a array. Then the expressions in the object are evaluated, right to left, and the value of each expression or constant is sent out the outlet corresponding to each expression.
int input [int]
 Contextual/User-specified according to Javascript arguments.
float input [float]
 Contextual/User-specified according to Javascript arguments.
list input [list]
 Contextual/User-specified according to Javascript arguments.
anything input [list]
 Contextual/User-specified according to Javascript arguments.

Information for box attributes common to all objects

Output

anything: When the jstrigger object receives a message in its inlet, the expressions are evaluated from right to left and their results are sent out the corresponding outlets from right to left.

Examples

See Also

Name Description
bangbang Send a bang to many places, in order
js Execute Javascript
jsui Javascript user interface and OpenGL graphics