Demonstrating a closure

simple-closure.js

// Closure Example

function exponent (x) {
  // returns a new function to be called later
  // this function remembers the x argument
  return function (y) {
    // ** is the exponentiation operator
    // same thing as Math.pow() or y to the power of x
    return y ** x
  }
}

// creates a function that squares a number
// it *remembers* that x is 2
// or in other words, it still has access to the
// lexical environment that it was created in
const square = exponent(2)

console.log(square(2), square(3)) // 4, 9

// cubed
console.log(exponent(3)(2)) // 8

// same thing as Math.pow() or x to the power of y

Should say y to the power of x
Innocuous mixup but it did confuse me for a good 5 minutes as I was reading the example.

// same thing as Math.pow() or x to the power of y

Should say y to the power of x
Innocuous mixup but it did confuse me for a good 5 minutes as I was reading the example.

Thanks, updated it