IIFE (Immediately Invoked Function Expression)

What will an IIFE that processes arguments using array methods output?

var result = (function() {
  return Array.prototype.slice.call(arguments).map(function(x) {
    return x * 2;
  });
})(1, 2, 3);

console.log(result);

[1, 2, 3]
[2, 4, 6]
The output will be [2, 4, 6]. This code demonstrates an IIFE that accepts arguments and processes them. When the IIFE is invoked with (1, 2, 3), these values are passed as arguments to the function. Inside the function, Array.prototype.slice.call(arguments) converts the arguments object into a regular array. Then, the map method is called on this array, creating a new array where each element is doubled. The resulting array [2, 4, 6] is returned from the IIFE and assigned to 'result'. This pattern is useful when you need to process arguments in a functional manner immediately upon function invocation. It combines the benefits of immediate execution with the ability to accept and transform input parameters.
[]
Error

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