A Guide to Currying in JavaScript

<p class="graf graf--p">Hello everyone, I&rsquo;m back with yet another article, this time on a concept in JavaScript which is called currying.</p> <p class="graf graf--p">Before I start on the concept itself, let&rsquo;s first dive into the origins of currying.</p> <p class="graf graf--p">The name &ldquo;currying&rdquo; was coined by <a class="markup--anchor markup--p-anchor" title="Christopher Strachey" href="https://en.wikipedia.org/wiki/Christopher_Strachey" target="_blank" rel="noopener" data-href="https://en.wikipedia.org/wiki/Christopher_Strachey">Christopher Strachey</a> in 1967. Currying has a lot of mathematical and computer science theories behind it. The concept is named after the mathematician <a class="markup--anchor markup--p-anchor" href="https://en.wikipedia.org/wiki/Haskell_Curry" target="_blank" rel="noopener" data-href="https://en.wikipedia.org/wiki/Haskell_Curry">Haskell Curry</a>.</p> <p class="graf graf--p">Currying is a concept that is used in functional programming. Functional programming is a <a class="markup--anchor markup--p-anchor" href="https://en.wikipedia.org/wiki/Programming_paradigm" target="_blank" rel="noopener" data-href="https://en.wikipedia.org/wiki/Programming_paradigm">programming paradigm</a>. A style of building the structure and elements of computer programs that treat computation as the evaluations of mathematical functions and avoids changing state and mutable data.</p> <p class="graf graf--p">Now back to the main topic: what is currying?</p> <p class="graf graf--p">Currying is a process in functional programming in which we can transform a function with multiple arguments into a sequence of nesting functions. It returns a new function that expects the next argument inline.</p>