> Boolean
[Function: Boolean]
> Boolean()
false
> Boolean('true')
true
> new Boolean('true')
[Boolean: true]

> process.cwd()
'/home/dse'
> new process.cwd()
cwd {}

def System.getEnv # Java 这里比较 emmmmm.... 没有用标准的方法名风格
  return System.getenv() # Just an alias of System#getenv

System.env::HOME #=> "/home/dse"
# instead of
System.getEnv()::HOME

import android.widget
import android.view
def LinearLayout.add(view)
  self.addView view

def Button.new
  return Button(ctx) # or Button(lite[:ctx])

layout << Button.new
# instead of
layout.addView(Button(ctx))

a = { self: nil }
def a.new(obj)
  a->self { obj: obj }
  a->print { print self.obj }
aa = a.new 1 + 1
aa.print()
如果是 @a 就直接用
@a->new do |obj| 吧