How to create a function with parameters based on array

Question

I have an array with would simbolize parameters of a function.

For Example:

var params = ['name', 'age', 'email'];

and this information is created by another endpoint which return this array. and from this array I would like to create a function like this:

function (name, age, email) {
 //...
 //my custom code
 return result;
}

So as you can see I would like to automatically create functions and use each array element as an argument to that function.

Is there any way to achieve that without using eval?

It seems new Function('name', 'age', 'email', 'fn body') can't be generated on the fly as well.

Thanks in advance

• Alex Turpin: What you want to do doesn't make any sense. There's no point in "creating" functions with named parameters. What is the real problem here?
• Radoslav Georgiev: Do you really need to do this ? You can just expect an array or object as a parameter, and get what you need from there.

Answer 1

var a = Function.apply( {}, ["name", "age", "email", "return email;"] );
/*function anonymous(name,age,email) {
return email;
}*/
a(1,2,3);
//3

This has no concrete benefits over eval though and what you are trying to do could probably be done differently without needing to evaluate strings into code on the fly

Answer 2

You can use .apply(). Make sure the function body is the last member of the array.

Function.apply( null, your_array );

Answer 3

If you want to call a function with an array of parameters, use apply. For example:

function foo(a, b, c) {
 alert(a + b + c);
}
foo.apply(null, [1, 2, 3]);