functional programming

Introduction to Functional Programming Functional Programming (FP) is a programming paradigm that includes specific techniques. There are both purely functional programming languages like Haskell, Clojure, and Scala, as well as programming languages that support functional programming techniques, such as JavaScript, Python, and Ruby. While the concept of functional programming dates back to the 1930s with the birth of lambda calculus, it has gained significant momentum recently. This is the perfect time to learn about functional programming, especially through JavaScript examples....

In Python, there are three useful global functions - map(), filter(), and reduce() - that we can use to work with collections. map() is specifically used to apply a function to each item in an iterable, such as a list, and create a new list with the same number of items, but with modified values. Let’s take a look at an example that demonstrates the use of map(). Suppose we have a list of numbers [1, 2, 3], and we want to double each number in the list....

The map() function in JavaScript is a crucial method when it comes to programming in a functional manner. An example of using the map() function involves iterating through an array, applying a specified function (f()) to each element, and building a new array with the results: const b = a.map(f); Using map(), we can create a new array from an existing array, and then further filter the result using the filter() function....

Learn how to perform common operations in JavaScript using map(), filter(), reduce(), and find() instead of using loops. Loops are commonly used in programming languages to perform operations on arrays. You can iterate over the elements of an array and perform calculations or operations on them. In this blog post, we’ll explore alternative approaches to using loops by leveraging functional programming concepts. We’ll specifically look at four powerful array functions: map(), filter(), reduce(), and find()....