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How can a function be emulated within another function?

asked 2022-07-12 11:00:00 +0000

qstack gravatar image

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answered 2022-05-04 08:00:00 +0000

lakamha gravatar image

One way to emulate a function within another function is to define the inner function within the outer function and return the inner function. The inner function can access variables and parameters of the outer function, and can be called and passed arguments from outside the outer function. Here is an example:

function outerFunction(x) {
  function innerFunction(y) {
    return x + y;
  }
  return innerFunction;
}

var addTwo = outerFunction(2);
console.log(addTwo(3)); // 5
console.log(addTwo(5)); // 7

In this example, outerFunction takes a parameter x and returns innerFunction, which takes a parameter y and returns the sum of x and y. When outerFunction(2) is called, it returns innerFunction with x set to 2. The resulting function can be stored in a variable addTwo and used to add 2 to any number passed as an argument.

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Asked: 2022-07-12 11:00:00 +0000

Seen: 1 times

Last updated: May 04 '22