JS-如何在不调用函数的情况下将函数作为参数传递（带有参数）

Question

I have this method:

myFunction: function(a,b,c) { 
   ... 
}

Now, I want to pass it as parameter to another method so it can be executed inside that method:

...
var a = "bla";
var b = "ble";
var c = "bli";
someFunction(myFunction(a,b,c),true,"test");

And then inside someFunction I would like to call myFunction like:

someFunction: function(func,bool,str){
   func();
}

Is that possible?

Thanks

Answer 1

Yes, but you have to create a function that makes the function call, ie bind (aka "curry") the function reference with the parameters:

someFunction(myFunction.bind(this, a, b, c), true, "test");

Some older browsers (eg IE 8) doesn't support the bind method, but you can do basically the same with a function expression:

someFunction(function() { myFunction(a, b, c); }, true, "test");

If you are using jQuery there is a $.proxy method that takes care of making it browser independent:

someFunction($.proxy(myFunction, this, a, b, c), true, "test");

Answer 2

Yes, this is possible in JavaScript.

someFunction(function () {
    myFunction(a,b,c);
}, true, "test");

You can even do:

var myFunc = function () {
    myFunction(a,b,c);
};
someFunction(myFunc, true, "test");