set a var to a function in another script

Questions & Answers
1

How can I set a var to a function in another script ?

The function is called “function SwingSound()” and is in a script called MouseSoundController on a object called Camera.
The below works fine.

#var mouseSound = GameObject; // Set link to the Mouse Sound Controller, I've put it on the camera

mouseSound.GetComponent.< MouseSoundController >().SwingSound();

I’ve tried the below with no luck, I get the message (Cannot convert ‘void’ to ‘UnityEngine.GameObject’.)

#var mouseSound = GameObject; // Set link to the Mouse Sound Controller, I've put it on the camera
private var myVar : GameObject;

myVar = mouseSound.GetComponent.< MouseSoundController >().SwingSound();
2

I really don’t know what you are trying to do here. But if you want to call a function in another script, you could do like this:

MouseSoundController.js:

// this returns the AudiSource from the gameObject this script is attached
function SwingSound () : AudioSource {
	return audio;
}

OtherScript.js

var mouseSound : GameObject; // The object that has the MouseSoundController attached
private var myAudio : AudioSource;
function Start() {
    myAudio = mouseSound.GetComponent("MouseSoundController").SwingSound();
    myAudio.Play();
}

EDIT: The solution of the problem:

If the function SwingSound in MouseSoundController is a void and don’t return a value, and it don’t take any parameters, then use this:

var mouseSound : GameObject;
function Start () {
	var myVar: System.Action;
	var swooshSoundEvent = new AnimationEvent();
    myVar = mouseSound.GetComponent(MouseSoundController).SwingSound;
    swooshSoundEvent.functionName = myVar.Method.Name;
    Debug.Log(swooshSoundEvent.functionName);
}

and: this is an example if the function SwingSound in MouseSoundController takes a parameter int, and return a value of float:

var mouseSound : GameObject;
function Start () {
	var myVar: System.Func.<int,float>; // where int is the type of variable put into the function, and float is the variable the function returns.
	var swooshSoundEvent = new AnimationEvent();
    myVar = mouseSound.GetComponent(MouseSoundController).SwingSound;
    swooshSoundEvent.functionName = myVar.Method.Name;
    Debug.Log(swooshSoundEvent.functionName);
}

The last script is the case where SwingSound looks similar to this:

function SwingSound (t:int) : float{
    return 1.0223; 
}
3

You can declare myVar: Function, like this (other script):

var myVar: Function; // myVar is a function reference

function Start(){
  // get the function reference (no parenthesis!)
  myVar = mouseSound.GetComponent(MouseSoundController).SwingSound;
}

// and use it like this:

  myVar();

You can even pass parameters and receive the function result, if you want.

NOTE: This version of GetComponent is better than the generic and string ones.