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https://github.com/rjNemo/functional-programming-jargon
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97 lines
1.3 KiB
Markdown
97 lines
1.3 KiB
Markdown
# Functional Programming Jargons
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> The whole idea of this repos is to try and define jargons from combinatorics and category theory jargons that are used in functional programming in a easier fashion.
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__Let's try and define these with examples, this is a WIP please feel free to send PR ;)__
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## Arity
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> The number of arguments a function takes.
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```js
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const sum = (a, b) => a + b;
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const arity = sum.length;
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console.log(arity);
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// => 2
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// The arity of sum is 2
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```
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---
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## Higher Order Functions (HOF)
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> A function for which both the input and the output are functions.
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```js
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let greet = (name) => () => `Hello ${name}!`;
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```
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```js
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greet("HOF")(); // Hello HOF!
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```
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## Partial Application
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---
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## Currying
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---
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## Purity
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---
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## Side effects
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---
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## Idempotency
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---
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## Referential Transparency
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> An expression that can be replaced with its value without changing the
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behaviour of the program is said to be referential transparent.
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Say we have function greet:
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```js
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let greet = () => "Hello World!";
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```
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Any invocation of `greet()` can be replaced with `Hello World!` hence greet is
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referential transparent.
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---
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## Monoid
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---
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## Monad
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---
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## Functor
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> Structure that can be mapped over.
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Simplest functor in javascript is an `Array`
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```js
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[2,3,4].map( function(n) {
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return n + 2;
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}); // [4,6,8]
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```
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---
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## Applicative Functor
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---
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## Morphism
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---
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