javascript 功能编程概念

Posted 2021-05-04

// PURE FUNCTIONS

/// For example, this is a pure function:
function add2 (x){
  return x + 2
}
/// And this is not:
var y = 2
function adder (x){
  return x + y
}

// CURRYING
///...


// FUNCTOR

/// if a data type has map function it's a functor
arr.map(x=>x*2) // etc
/// rule: given x=>x should not make any change

// MONAD