bind(), call(), and apply()

What functional programming concept is demonstrated here?

function multiply(rate, num) {
  return rate * num;
}

const double = multiply.bind(null, 2);
const triple = multiply.bind(null, 3);

console.log(double(5));
console.log(triple(5));

Method chaining
Function currying
This demonstrates function currying through bind(): 1) Creates specialized functions from a general function, 2) Pre-sets the first argument while leaving the second flexible, 3) null is used as context since this isn't needed, 4) Enables creation of reusable, specialized functions, 5) Common in functional programming for function transformation, 6) Improves code reusability and readability.
Function composition
Recursive binding

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