This post is a continuation of series of posts started in previous article. Previously we’ve talked about one of the most awesome, innovative and pleasant projects that we had the honor to develop here in FlatStack. In this article I will tell you about the problems we’ve faced and how the right choice of technologies stack helped us to solve them.

Database queries are common when you develop web applications. Ruby on Rails and it’s ActiveRecord liberates you from writing tons of boilerplate SQL code and results in creation of elegant, eloquent queries in plain Ruby.

Markov chains

Pattern matching is a key feature of functional programming. It allows you to check a given sequence of tokens for the presence of the constituents of some pattern. Using pattern matching you can easily operate with complex data structures in most expressive and eloquent way. Elixir provides pattern matching like any other functional programming language.

If you want to use all features of functional programming with Ruby-like syntax to write modern fast, fault-tolerant applications, you may take a look at Elixir programming language.

Currying and partial function application are common concepts of the functional programming. They look similar, but have differences in realization and using. Ruby allows you to easily operate with both of them.

Ruby has much in common with functional programming languages. For example, Ruby supports high-order functions, lambdas, currying and recursion, but not the immutability - Ruby’s types and data structures are mutable and can be changed at any time.

Node.js has a simple and powerful stream API. Streams in Node.js are unix pipes that let you perform asynchronous I/O operations by reading source data and pipe it to destination. If your application operates not with streams only, but promises, callbacks or synchronous code, you may want to use more deeper abstraction that fits your needs. In this case you may take a look at Highland.

As we know, functional programming in JavaScript is not the best experience, unlike the plain functional languages (Haskell, Lisp, etc). But new standards of JavaScript - ES6 (ECMAScript 2015) and ES7(ECMAScript 2016) introduce some improvements and allows you to write code in more functional style:

Ruby is a great example of multi-paradigm programming language: it allows you to write code in object-oriented, imperative or functional styles. Ruby have much in common with functional programming languages: high-order functions, closures, anonymous functions, continuations, statements all values. If you want to use more functional programming patterns and tools, you might want to take a look on Functional Ruby gem.

Ruby is dynamically and strong typed programming language. In the most of the cases it gives you required level of type safety with minimal code. But if you want build more secure applications or you’re like static typing, then you need to check every variable or method for it’s type or class:

JavaScript is one of the most dynamic, flexible and powerful programming languages. It supports multiple programming paradigms - imperative, object (prototype) oriented, scripting, and functional.
Let’ see what JavaScript has common with functional programming languages:

If you’re using Jekyll to generate your static website, you may want to deploy it as simple and fast, as Jekyll works. For this case, Ruby ecosystem has remote server automation and deployment tool that called Capistrano .

Jekyll is the great static website generator, that can be easily used for blogs, portfolio pages, galleries and others simple projects. It`s very simple, flexible tool that can be upgraded with hundreds powerful plugins.

Welcome! This is my blog about web development, functional programming and others geeky themes.