Introduction

Why another standard library ?

@w5s/std is a collection of packages for strictly typed functional programming in TypeScript. It focuses on strong typing, immutability, simplicity and restricted set of functionalities. Advanced functional programming patterns and immutability should not be used if it degrades significantly type safety and simplicity.

Summary :

	Balance
Loose typing	□□□□□□■	Strong typing
Impure, Mutable	□□□□□■□	Pure, Immutable
Simple Functional Programming	□□■□□□□	Advanced Functional Programming
Lean API	□□■□□□□	Complete API

Comparison with other libraries

fp-ts

Pros:

• Complete and Standardized API
• Strict typing
• If you love FP, you will feel at home (monad, monoid, semi-group)

Cons:

• Too many functions (sometimes lack of documentation, examples)
• Trying to look like Haskell without operators and compiler leads to a weird JS syntax, hard to understand
• If you do not know FP, learning curve is steep

Summary :

	Balance
Loose typing	□□□□□□■	Strong typing
Impure, Mutable	□□□□□□■	Pure, Immutable
Simple Functional Programming	□□□□□□■	Advanced Functional Programming
Lean API	□□□□□□■	Complete API

Ramda

Pros:

• Complete and Standardized API
• Nice learning curve
• Currying

Cons:

• Does not always play well with Typescript

Summary :

	Balance
Loose typing	□■□□□□□	Strong typing
Impure, Mutable	□□□□■□□	Pure, Immutable
Simple Functional Programming	□□□□■□□	Advanced Functional Programming
Lean API	□□□■□□□	Complete API