使局部功能成为全局函数

Question

In Javascript with ProcessingJS.

If I define a function outside the draw function, how can I pass this function to the draw function (without copying and pasting inside the draw function)?

var myFunction = function()
{
    code;
}

var draw = function(){ 
    myFunction(); 
};

How do you make a function global?

I use a limited environment, Khan Academy, and only the simplest functions and commands are available.

Thanks for your replies, and sorry to be a beginner.

Answer 1

You could pass your function as a parameter. For example:

var myFunction = function() {code;}

var draw = function(f) { f(); };

draw(myFunction);

Answer 2

I use Khan Academy too. There are strict syntax rules that don't make sense anywhere else. To answer the question,

var myFunction = function () {
    /* Stuff */
}, draw = function () {
    myFunction();
};

will work just fine.

Answer 3

You're using invalid syntax. If you want to make a global function and call it inside draw() , just declare it like a regular function:

var myFunction = function () {   // <-- note the "=" sign and "function" keyword here
    code;
};

var draw = function (){ 
    myFunction(); 
};

Answer 4

What you are asking for is to call myFunction inside the draw function.

Here is how you would do that:

var myFunction = function(){
    //your code here
}   

var draw = function(fun){
   fun();
}

Basically, if you want to call myFunction() inside the draw() function, you have to pass a function into draw(), this is called a parameter. Like so: var draw = (fun) Here, fun is a function being passed into draw. Now you just need to call it using fun();

Good luck!