Selectors

Selectors are identifiers for properties and methods of classes and instances. Each property and method has a selector index, which points to its name in vocab.997.

Examples of selectors are: x, y, doit, init, dispose, changeState.

Example:

// Using the x selector to retrieve a property:
FormatPrint("The x is %d" (send gEgo:x))

// Using the z selector to set a property:
(myView:z(10))

// Calling a method selector:
(myView:init())

However, you are also able to retrieve the numerical selector index of a property or method selector. To do this, you can use the # character:

FormatPrint("The init selector index is %d" #init)

One place this is useful is when you want to test if an object supports a particular property or method:

// Test if the object has a cue method before calling that cue method:
(if (send theObject:respondsTo(#cue))
        (send theObject:cue())
)