This would be a nice way to define a method in CoffeeScript...

Ruby.coffeescript

# The current way to define and run a method in CoffeeScript:

hello = (name) -> 
  alert 'Hello ' + name

hello 'Chris'

# JavaScript output:

var hello;
hello = function(name) {
  return alert('Hello ' + name);
};
hello('Chris');

# ---

# Wouldn't it be great to define a CoffeeScript method using Ruby syntax like this:

def hello(name)
  alert "Hello #{name}"
end

hello 'Chris'

# JavaScript output would be the same:

var hello;
hello = function(name) {
  return alert('Hello ' + name);
};
hello('Chris');

# If we used keywords like def, end, and perhaps also the proc syntax to define CoffeeScript methods
# we wouldn't need the whitespace and the overall syntax would be more like Ruby.

# Of course, this is just my initial opinion after a quick browse through the language.