Currying JavaScript Sum

Currying is a technique in functional programming where we can transform a function with multiple arguments into a sequence of functions that each take a single argument. In JavaScript, we can use currying to create reusable functions that become more flexible with each parameter.

Say we have a simple function that takes two arguments and returns their sum:

function sum(x, y) {
  return x + y;
}

We can curry this function to create a new function that takes one argument and returns a function that takes another argument:

function curriedSum(x) {
  return function(y) {
    return x + y;
  };
}

We can then call this function in different ways:

curriedSum(1)(2); // returns 3
const addOne = curriedSum(1);
addOne(2); // returns 3

By currying the sum function, we've made it more flexible and able to be used in different situations.

Benefits of Currying

Currying can be very useful in situations where we have functions that take many arguments and may need to be reused with different parameters. Here are some benefits of currying:

• Code reuse: By currying a function, we can create new versions of that function that can be used with different parameters. This reduces the amount of code we need to write and makes our code more modular.
• Flexibility: Curried functions are more flexible than non-curried functions because they can be partially applied with some arguments, leaving the rest of the arguments open to be filled in later. This makes curried functions more adaptable to different situations.
• Improved readability: Currying can make our code more readable by breaking down complex functions into simpler components that can be combined together.

Conclusion

Currying is a powerful technique in functional programming that can make our code more flexible, modular, and readable. By breaking functions down into simpler components, we can create new versions of those functions that are more adaptable to different use cases.