naming a function on a global scale

Question

naming a function on a global scale

Looking for a JavaScript function f that can take an anonymous function g and a name n, and assign g to that name in the global scope or current scope. The function should be usable in this way:

f(function(){ /* code */ }, "foo");

foo(); // this call should now work!

Is there a way to achieve this using only JavaScript, without involving any DOM manipulation? This code is not meant for browser execution.

Note: Whether or not there is a valid reason for this functionality is irrelevant. Please refrain from discussing the importance of maintaining a clean global scope.

javascript metaprogramming jint

Answer 1

Answer №1

According to Reid

function insertValueIntoArray(value, index) {
    this[index] = value;
}

For added security:

function insertValueIntoArray(value, index) {
    (function() { return this; })()[index] = value;
}

Answer 2

According to Reid

function insertValueIntoArray(value, index) {
    this[index] = value;
}

For added security:

function insertValueIntoArray(value, index) {
    (function() { return this; })()[index] = value;
}

Answer 3

Answer №2

To ensure compliance with ES5 strict mode, you must include the following code:

var addGlobalFunction = (function(global) {
    return function (fn, name) {
        global[name] = fn;
    };
})(this);

This code keeps a reference to the global object within a closure. The necessity of such a function may not be immediately apparent.

Answer 4

To ensure compliance with ES5 strict mode, you must include the following code:

var addGlobalFunction = (function(global) {
    return function (fn, name) {
        global[name] = fn;
    };
})(this);

This code keeps a reference to the global object within a closure. The necessity of such a function may not be immediately apparent.

naming a function on a global scale

Answer №1

Answer №2

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