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What are the benefits of using currying and partial application?

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TL;DR

Currying transforms a function with multiple arguments into a sequence of functions, each taking a single argument. This allows for more flexible and reusable code. Partial application, on the other hand, allows you to fix a few arguments of a function and generate a new function. Both techniques help in creating more modular and maintainable code.


Benefits of using currying and partial application

Currying

Currying is a technique where a function with multiple arguments is transformed into a sequence of functions, each taking a single argument. This can lead to more flexible and reusable code.

Benefits

  • Function reusability: Currying allows you to create specialized functions from general ones by fixing some arguments.
  • Code readability: It can make the code more readable and expressive by breaking down complex functions into simpler ones.
  • Functional programming: Currying is a core concept in functional programming, which can lead to more predictable and testable code.

Example

function add(a) {
return function (b) {
return a + b;
};
}
const addFive = add(5);
console.log(addFive(3)); // Output: 8

Partial application

Partial application is a technique where you fix a few arguments of a function and generate a new function. This can be useful for creating more specific functions from general ones.

Benefits

  • Code reuse: Like currying, partial application allows you to create specialized functions from general ones.
  • Improved readability: It can make the code more readable by reducing the number of arguments needed when calling a function.
  • Simplified function calls: By pre-filling some arguments, you can simplify the function calls in your code.

Example

function multiply(a, b) {
return a * b;
}
const double = multiply.bind(null, 2);
console.log(double(5)); // Output: 10

Further reading

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