keyword arguments for boolean arguments

[ruba-ruba]

I found that i often see methods which consume a boolean argument and depends on it method define some logic. However i every time have to check the source because ...

some dummy example

def load_posts(include_unpublished = false)
  if include_unpublished?
    MyDataStorage.load_all
  else
    MyDataStorage.published
  end
end

# in code method invoked as
1) load_posts(false) 
2) load_posts
3) load_posts(true)
# and it is not meaningful for me

# however if we define method like => def load_posts(include_unpublished: false)
4) load_posts(include_unpublished: true)
# now i know what will happen without reading source code of method

---

i also have the same thoughts about numbers as arguments, and keyword arguments is a nice thing to use.

[bbatsov]

I think a much more general point can be made - keyword arguments usually give the best readability. Now that Ruby 1.9 is not supported anymore and few people still use it I'd wouldn't suggest the usage of option hashes.