defineProperty.coffee

Function.prototype.define = (prop, desc) ->
    Object.defineProperty(this.prototype, prop, desc)

class Name
    constructor: ({@first, @last}) ->
    	
    @define "full",
        get: ->
            return "#{@first} #{@last}"
			
        set: (value) -> 
            array = value.split(" ")
            @first = array[0]
            @last  = array[1]
		
name = new Name
    first: "Anton"
    last:  "Kartashov"

print name.full
# » "Anton Kartashov"

name.full = "Clark Kent"
print name.first
print name.last
# » "Clark"
# » "Kent"

name.last = "Gable"
print name.full
# » "Clark Gable"