Javascript Currying | Benefits of Currying in Javascript

Currying is an advanced technique used in functional programming to transform a function. It is useful for creating reusable and composable functions, and it can help make code more modular and easier to reason about. Currying is used not only in JavaScript, but in other languages as well.

It is about breaking down a function that takes multiple arguments into a series of functions that each take a single argument.

If you have worked with React JS and 'Higher Order Components', you may have used this pattern already. In the context of React and Higher Order Components (HOCs), currying can be used to create a reusable Higher Order Components that can be applied to multiple components to enhance the functionality of existing components.

Currying is also used in conjunction with Redux to create reusable functions for handling state updates. In Redux, 'action creators' are functions that return an action object, that describes an event in the application. Currying can be used to create action creator functions that can be reused with different arguments to update different parts of the state.

- Benefits of Currying in Javascript

Currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of functions, each with a single argument. It's useful for creating specialized versions of general functions. Here are some benefits of using currying in JavaScript:

1. Code Reusability and Composition: Curry functions help break down complex functions into simpler ones, leading to code that is more reusable and composable. For example, you can curry a `multiply` function to create a `double` or `triple` function without having to rewrite the entire logic.

2. Delayed Execution: Currying allows you to create functions that can get their arguments and be called later. This is helpful when you need to delay a calculation until you have all the necessary input.

3. Enhanced Functionality: With currying, you can hold or freeze some portion of a function and create a new function with predefined arguments, effectively enhancing the functionality of the original function. This is known as partial application.

4. Readability and Maintainability: By breaking down complex functions into smaller ones, the resulting code becomes more readable and maintainable. It also aids in writing self-documenting code, as each function does a specific task.

5. Cleaner Syntax: JavaScript supports first-class functions which can be assigned to variables, stored in data structures, and passed as arguments or returned from other functions. This, combined with currying, can lead to cleaner and more elegant code.

6. Pipeline of Operations: Curried functions are great for creating a pipeline of operations, where each function takes the output of the previous one as its input. This can be extremely useful for data transformation.

Remember, though, currying comes with its own set of drawbacks such as potential performance issues (due to the additional function calls) and potential readability issues for those not familiar with the concept. Hence, its use should be judicious and balanced.

I hope this explanation will also help you with currying in javascript interview questions.

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