Provide some examples of how currying and partial application can be used

Currying transforms a function with multiple arguments into a sequence of functions, each taking a single argument. Partial application fixes a few arguments of a function, producing another function with a smaller number of arguments. For example, currying a function add(a, b) would look like add(a)(b), while partial application of add(2, b) would fix the first argument to 2, resulting in a function that only needs the second argument.

Currying example:

const add = (a) => (b) => a + b;
const addTwo = add(2);
console.log(addTwo(3)); // 5

Partial application example:

const add = (a, b) => a + b;
const addTwo = add.bind(null, 2);
console.log(addTwo(3)); // 5