Molecules

Molecules are selector functions -- functions that select certain aspects of state and returns them.

This is what a molecule is internally:

type Molecule<T> = () -> T

What is considered a molecule?

• Computeds

• Flecs

  The read operation of a flec can be considered a molecule.

  local count = flec(0)
  
  local display_count = function()
      print(`count: {count()}`)
  end
  
  effect(function()
      display_count()
  end)

• Functions

  As long as you have a state object that's being read inside a function, that function is considered a molecule.

  local subscribe = Teisu.subscribe
  
  local text = flec("hi there reader!")
  
  local uppercase = function()
      return string.upper(text())
  end
  
  subscribe(uppercase, function(new)
      print(new)
  end)