Is it possible to set a variable to be equal to a function without using a shell?
In JavaScript, you can set a variable equal to a method like this:
variable = function () { alert("My name is bob"); };
Or like this:
function SayMyName() {
alert("My name is bob");
}
variable = SayMyName;
You can also wrap a function with arguments like this:
function SayMyName(name) {
alert("My name is "+ name);
}
variable = function () { SayMyName("bob"); };
But when trying to store the variable, the following call will call the function rather than store it as a variable:
function SayMyName(name) {
alert("My name is "+ name);
}
variable = SayMyName("bob");
There was a clever way you could work using [callee] [1], but the callable is deprecated and won't work in most modern browsers.
Is there a way to set a variable equal to a function with arguments without using a shell?
You can use the method bind
to fix some parameters
var variable = SayMyName.bind(null, "bob");
However, this doesn't work in IE <= 8, so you'll have to use a similar replacement or polyfilm in this case.
Can't you use a nested anonymous function for this?
var variable = function(name) {
return function() {
alert('My name is ' + name);
};
};
Calling this result gives the desired result:
var test = variable('bob');
test(); // Alerts "My name is bob"
You can return a function like:
function SayMyName(x) { return function() { alert("My name is Bob.");}};
var x = SayMyName('bob');
x();
var name = (function sayMyName(name) {
return alert('My name is: ' + name);
});
name('Mike');
public class ToyProgram{
public static void main(String[] args){
String funcCallVar = aFunc();
System.out.println(funcCallVar);
}
public static String aFunc(){
String aVariable = "yes you can set a variale equal to a function";
return aVariable;
}
}